/* Modern Premium Design System for Goethe A1 Learning Portal */

/* CSS Variables & Theme Setup */
:root {
    /* Fonts */
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Accessibility sizing ratio */
    --font-scale: 1;

    /* Transition Speeds */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows */
    --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 16px -2px rgba(0, 0, 0, 0.1), 0 4px 8px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 15px 2px var(--color-accent-glow);

    /* Base Dimensions */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* Dark Theme Variables */
body.dark-mode {
    --color-bg-grad-1: #090d16;
    --color-bg-grad-2: #111827;
    --color-bg-solid: #0d121f;
    --color-panel: rgba(22, 28, 45, 0.75);
    --color-panel-solid: #161c2d;
    --color-panel-hover: rgba(30, 41, 59, 0.85);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-focus: rgba(99, 102, 241, 0.5);
    
    --color-text-primary: #f3f4f6;
    --color-text-secondary: #9ca3af;
    --color-text-muted: #6b7280;

    --color-accent: #6366f1; /* Indigo */
    --color-accent-hover: #4f46e5;
    --color-accent-light: rgba(99, 102, 241, 0.15);
    --color-accent-glow: rgba(99, 102, 241, 0.35);

    --color-success: #10b981; /* Emerald */
    --color-success-light: rgba(16, 185, 129, 0.15);
    
    --color-warning: #f59e0b; /* Amber */
    --color-warning-light: rgba(245, 158, 11, 0.15);
    
    --color-danger: #ef4444; /* Rose */
    --color-danger-light: rgba(239, 68, 68, 0.15);
}

/* Light Theme Variables */
body.light-mode {
    --color-bg-grad-1: #f3f4f6;
    --color-bg-grad-2: #e5e7eb;
    --color-bg-solid: #ffffff;
    --color-panel: rgba(255, 255, 255, 0.85);
    --color-panel-solid: #ffffff;
    --color-panel-hover: rgba(243, 244, 246, 0.95);
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-focus: rgba(79, 70, 229, 0.5);
    
    --color-text-primary: #1f2937;
    --color-text-secondary: #4b5563;
    --color-text-muted: #9ca3af;

    --color-accent: #4f46e5;
    --color-accent-hover: #4338ca;
    --color-accent-light: rgba(79, 70, 229, 0.08);
    --color-accent-glow: rgba(79, 70, 229, 0.2);

    --color-success: #059669;
    --color-success-light: rgba(5, 150, 105, 0.08);
    
    --color-warning: #d97706;
    --color-warning-light: rgba(217, 119, 6, 0.08);
    
    --color-danger: #dc2626;
    --color-danger-light: rgba(220, 38, 38, 0.08);
}

/* --- Base Styles & Resets --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: calc(16px * var(--font-scale));
}

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, var(--color-bg-grad-1) 0%, var(--color-bg-grad-2) 100%);
    background-attachment: fixed;
    color: var(--color-text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background var(--transition-slow), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
}

/* --- Touch Targets Accessibility --- */
/* Enforces minimum 44px x 44px clickable boxes for mobile accessibility */
button, 
select, 
input[type="text"],
input[type="date"],
input[type="number"],
.q-btn,
.nav-tab,
.option-item,
.practice-topic-card,
.module-card {
    min-height: 44px;
    min-width: 44px;
}

/* Accessibility Focus States */
button:focus-visible, 
input:focus-visible, 
select:focus-visible, 
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    top: -80px;
    left: 20px;
    background: var(--color-accent);
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    z-index: 99999;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: top var(--transition-fast);
}
.skip-link:focus {
    top: 0;
}

/* Utility Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* Layout Framework */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Glassmorphism Panel base */
.glass-panel {
    background: var(--color-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: background var(--transition-normal), border var(--transition-normal), transform var(--transition-normal);
}

/* --- Global Header --- */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: rgba(var(--color-bg-solid), 0.35);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
    z-index: 1000;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    background: var(--color-accent);
    color: #ffffff;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-glow);
}

.logo-text h1 {
    font-size: 1.15rem;
    letter-spacing: -0.5px;
}
.logo-text span {
    font-size: 0.7rem;
    color: var(--color-accent);
    font-weight: 700;
    letter-spacing: 1.5px;
}

/* Header status indicators */
.header-stats {
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.streak-badge {
    border-color: rgba(245, 158, 11, 0.25);
    background: var(--color-warning-light);
    color: var(--color-warning);
    font-weight: 700;
}
.streak-emoji {
    animation: bounce 0.6s ease infinite alternate;
}

.level-badge {
    color: var(--color-text-primary);
    font-weight: 600;
}

.module-badge .badge-label {
    color: var(--color-text-secondary);
}
.module-badge .badge-value {
    color: var(--color-accent);
    font-weight: 700;
}

.timer-badge {
    background: var(--color-danger-light);
    border-color: rgba(239, 68, 68, 0.25);
    color: var(--color-danger);
    font-weight: 700;
    min-width: 90px;
    justify-content: center;
}
.timer-badge.warning-time {
    animation: pulse 1s infinite alternate;
}

.icon {
    width: 18px;
    height: 18px;
}

/* Control Buttons (Font scale & scheme) */
.header-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-btn {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    transition: all var(--transition-fast);
}
.control-btn:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent);
    color: var(--color-accent);
}
.font-btn {
    font-size: 0.85rem;
}

/* Main progress bar */
.progress-bar-container {
    width: 100%;
    height: 6px;
    background: var(--color-border);
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-success) 100%);
    width: 0%;
    transition: width var(--transition-normal);
}

/* --- Main Layout Grid --- */
.main-layout {
    display: flex;
    flex: 1;
    position: relative;
}

/* Sidebar panel styling */
.app-sidebar {
    width: 320px;
    border-right: 1px solid var(--color-border);
    background: rgba(var(--color-bg-solid), 0.2);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
}

.sidebar-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
}
.sidebar-header h2 {
    font-size: 1.1rem;
}
.sidebar-header .subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.module-nav-tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-panel);
}
.nav-tab {
    padding: 12px 4px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}
.nav-tab:hover {
    color: var(--color-text-primary);
    background: rgba(255,255,255,0.02);
}
.nav-tab.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
    background: var(--color-accent-light);
}

/* Question grid navigation */
.question-navigator {
    padding: 16px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    overflow-y: auto;
    overflow-x: hidden;
    width: 100%;
    flex: 1;
}

.q-btn {
    width: 100%;
    min-width: 0;
    padding: 0;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-panel);
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition-fast);
}
.q-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}
.q-btn.active {
    box-shadow: 0 0 0 2px var(--color-accent);
    color: var(--color-text-primary);
}
.q-btn.answered {
    background: var(--color-success-light);
    color: var(--color-success);
    border-color: rgba(16, 185, 129, 0.3);
}
.q-btn.unanswered {
    background: var(--color-panel);
}
.q-btn.review {
    border-color: var(--color-warning);
}
.q-btn.review::after {
    content: '';
    position: absolute;
    top: 2px;
    right: 2px;
    width: 6px;
    height: 6px;
    background: var(--color-warning);
    border-radius: var(--radius-full);
}

.sidebar-legend {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}
.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    display: inline-block;
}
.status-answered { background: var(--color-success); }
.status-unanswered { background: var(--color-text-muted); }
.status-review { background: var(--color-warning); }

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
}

/* Button UI presets */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    gap: 8px;
}
.btn-primary {
    background: var(--color-accent);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
    background: var(--color-accent-hover);
    box-shadow: var(--shadow-glow);
}
.btn-secondary {
    background: var(--color-panel);
    border-color: var(--color-border);
    color: var(--color-text-primary);
}
.btn-secondary:hover {
    background: var(--color-panel-hover);
    border-color: var(--color-text-muted);
}
.btn-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
    border-color: rgba(245, 158, 11, 0.3);
}
.btn-warning:hover {
    background: var(--color-warning);
    color: #ffffff;
}
.btn-danger {
    background: var(--color-danger);
    color: #ffffff;
}
.btn-danger:hover {
    background: #be123c;
}
.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
}
.full-width-btn {
    width: 100%;
}
.icon-right {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}
.btn:hover .icon-right {
    transform: translateX(4px);
}
.icon-left {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}
.btn:hover .icon-left {
    transform: translateX(-4px);
}

/* --- Main content panels --- */
.main-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.view-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    animation: fadeIn 0.35s ease-out;
}
.view-panel.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== 1. LANDING DASHBOARD STYLING ==================== */
.dashboard-hero-title {
    text-align: center;
    margin-bottom: 30px;
    margin-top: 10px;
}
.dashboard-hero-title h2 {
    font-size: 2.5rem;
    font-family: var(--font-heading);
    letter-spacing: -1px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--color-text-primary) 30%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.credit-line {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-style: italic;
}
.credit-line strong {
    font-size: 1.15rem; /* ~25-30% larger */
    color: var(--color-accent);
    display: inline-block;
    margin-left: 4px;
}

.dashboard-stats-row {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 24px;
    margin-bottom: 32px;
}
.dashboard-stat-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.widget-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}
.widget-icon {
    font-size: 1.5rem;
}
.challenge-desc {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}
.challenge-status-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.challenge-status-badge {
    font-size: 0.8rem;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: var(--radius-full);
}
.status-pending {
    background: var(--color-warning-light);
    color: var(--color-warning);
}
.status-completed {
    background: var(--color-success-light);
    color: var(--color-success);
}

.streak-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    text-align: center;
}
.streak-item {
    display: flex;
    flex-direction: column;
    background: rgba(var(--color-bg-solid), 0.2);
    padding: 10px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}
.streak-item .num {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent);
}
.streak-item .lbl {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-top: 4px;
    line-height: 1.3;
}

.dashboard-modules-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.module-card {
    display: flex;
    align-items: flex-start;
    padding: 28px;
    gap: 20px;
    cursor: pointer;
}
.module-card-icon {
    font-size: 2.25rem;
    background: var(--color-accent-light);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}
.module-card-body h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}
.module-card-body p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}
.module-card-action {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-accent);
    display: inline-block;
    transition: transform var(--transition-fast);
}
.module-card:hover .module-card-action {
    transform: translateX(4px);
}

.practice-btn, .btn-touch {
    min-height: 44px;
}

.mistakes-quick-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 28px;
    gap: 20px;
    margin-bottom: 20px;
    border-left: 4px solid var(--color-danger);
}
.banner-left {
    display: flex;
    align-items: center;
    gap: 16px;
}
.banner-icon {
    font-size: 1.75rem;
}
.banner-text h3 {
    font-size: 1.05rem;
    margin-bottom: 4px;
}
.banner-text p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* Hover/Touch Micro-Animations */
.practice-topic-card:hover, 
.module-card:hover, 
.practice-topic-card:focus-visible, 
.module-card:focus-visible {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}
.practice-topic-card:active, 
.module-card:active {
    transform: translateY(-1px) scale(0.99);
}

/* ==================== 2. PRACTICE MODULE MENU ==================== */
.panel-header-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 28px;
    gap: 16px;
}
.panel-header-nav h2 {
    font-size: 1.5rem;
    flex: 1;
    margin-left: 12px;
}

.practice-topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.practice-topic-card {
    padding: 24px;
    cursor: pointer;
}
.topic-icon {
    font-size: 2rem;
    margin-bottom: 14px;
}
.practice-topic-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.practice-topic-card p {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}
.mistakes-topic {
    border-color: rgba(239, 68, 68, 0.25);
    background: var(--color-danger-light);
}

/* ==================== 3. PRACTICE WORKSPACE ==================== */
.practice-score-badge {
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 700;
}
.practice-score-badge span {
    color: var(--color-accent);
}

/* Option selections correction states */
.option-item.correct-answer {
    border-color: var(--color-success);
    background: var(--color-success-light);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}
.option-item.correct-answer .option-radio {
    border-color: var(--color-success);
    background: var(--color-success);
}
.option-item.incorrect-answer {
    border-color: var(--color-danger);
    background: var(--color-danger-light);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
}
.option-item.incorrect-answer .option-radio {
    border-color: var(--color-danger);
    background: var(--color-danger);
}

/* Color Accent presets */
.font-indigo { color: #6366f1 !important; }
.font-orange { color: #f59e0b !important; }
.font-emerald { color: #10b981 !important; }
.font-muted { color: var(--color-text-secondary) !important; }

/* ==================== 4. MISTAKES CENTER PORTAL ==================== */
.mistakes-card {
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all var(--transition-fast);
}
.mistakes-card:hover {
    border-color: var(--color-danger);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.08);
}
.mistakes-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 8px;
}
.mistakes-card-meta {
    display: flex;
    gap: 8px;
}
.mistakes-card-body p {
    font-size: 0.9rem;
    margin-bottom: 6px;
}
.mistakes-card-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 8px;
}

/* ==================== 5. PROGRESS & DASHBOARD STATS ==================== */
.progress-tallies-grid {
    margin-bottom: 40px;
}

/* ==================== 7. START SCREEN STYLING ==================== */
.start-card {
    max-width: 1000px;
    margin: auto;
    width: 100%;
    overflow: hidden;
}

.start-card-hero {
    padding: 40px;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, rgba(22, 28, 45, 0.4) 100%);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}
.lang-tag {
    background: var(--color-accent);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.start-card-hero h2 {
    font-size: 2.25rem;
    margin-top: 12px;
    margin-bottom: 8px;
}
.start-card-hero .subtitle {
    color: var(--color-text-secondary);
}

.start-card-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    border-top: 1px solid transparent;
}

.start-form-section {
    padding: 40px;
    border-right: 1px solid var(--color-border);
}

.start-form-section h3 {
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text-secondary);
}
.form-group input, 
.form-group select {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    transition: all var(--transition-fast);
}
.form-group input:focus, 
.form-group select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 1px var(--color-accent);
}
.input-error {
    display: none;
    font-size: 0.75rem;
    color: var(--color-danger);
    margin-top: 4px;
}
.help-text {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 6px;
    line-height: 1.4;
}

.required {
    color: var(--color-danger);
}

.start-btn {
    width: 100%;
    margin-top: 16px;
    padding: 14px;
    font-size: 1rem;
}

.start-instructions {
    padding: 40px;
    background: rgba(var(--color-bg-solid), 0.15);
}
.start-instructions h3 {
    margin-bottom: 24px;
}
.rules-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.rules-list li {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.rule-icon {
    font-size: 1.5rem;
    line-height: 1.2;
}
.rule-desc {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}
.rule-desc strong {
    color: var(--color-text-primary);
    display: block;
    margin-bottom: 2px;
}

/* ==================== 8. EXAM WORKSPACE ==================== */
.exam-workspace-grid {
    display: grid;
    grid-template-columns: 0.6fr 0.4fr;
    gap: 24px;
    flex: 1;
}

.workspace-stimulus, 
.workspace-qa {
    padding: 24px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    max-height: calc(100vh - 160px);
}

.stimulus-content {
    display: none;
    flex-direction: column;
    flex: 1;
}
.stimulus-content.active {
    display: flex;
}

/* Hören: Custom Audio Player card */
.audio-control-card {
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin: auto 0;
    box-shadow: var(--shadow-sm);
}

.audio-status {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

/* Micro visual waveform animation */
.audio-waveform-animation {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 30px;
    width: 45px;
}
.audio-waveform-animation span {
    display: block;
    width: 4px;
    height: 15%;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    transition: height 0.1s ease;
}
.audio-waveform-animation.playing span {
    animation: wave-bounce 0.8s ease infinite alternate;
}
.audio-waveform-animation.playing span:nth-child(2) { animation-delay: 0.15s; }
.audio-waveform-animation.playing span:nth-child(3) { animation-delay: 0.3s; }
.audio-waveform-animation.playing span:nth-child(4) { animation-delay: 0.45s; }
.audio-waveform-animation.playing span:nth-child(5) { animation-delay: 0.6s; }

@keyframes wave-bounce {
    0% { height: 15%; }
    100% { height: 100%; }
}

.play-indicator-text {
    display: flex;
    flex-direction: column;
}
.status-badge {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.status-badge.pulse {
    color: var(--color-accent);
}
.play-counter {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.audio-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}
.audio-btn {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background: var(--color-panel);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}
.audio-btn svg {
    width: 24px;
    height: 24px;
}
.audio-btn:hover:not(:disabled) {
    background: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
    transform: scale(1.05);
}
.audio-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.audio-track-slider {
    display: flex;
    align-items: center;
    gap: 12px;
}
.time-stamp {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
}
.audio-slider-bar {
    flex: 1;
    height: 6px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    position: relative;
    cursor: pointer;
}
.audio-slider-fill {
    height: 100%;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    width: 0%;
}

/* Fallback Speech Transcription Styles */
.transcription-details {
    margin-top: 24px;
    border-top: 1px dashed var(--color-border);
    padding-top: 16px;
}
.transcription-details summary {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    cursor: pointer;
    font-weight: 600;
}
.transcription-details summary:hover {
    color: var(--color-text-primary);
}
.transcription-text-box {
    margin-top: 12px;
    padding: 16px;
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

/* Lesen Text display styles */
.lesen-document-view,
.schreiben-document-view {
    display: flex;
    flex-direction: column;
    flex: 1;
}
.doc-label {
    align-self: flex-start;
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}
.lesen-document-body,
.schreiben-prompt-display {
    flex: 1;
    line-height: 1.6;
    font-size: 0.95rem;
    color: var(--color-text-primary);
    overflow-y: auto;
}
.lesen-document-body p,
.schreiben-prompt-display p {
    margin-bottom: 16px;
}
.document-box {
    border: 1px solid var(--color-border);
    background: var(--color-panel-solid);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}
.document-box.email {
    font-family: var(--font-body);
}
.email-meta {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 8px;
    margin-bottom: 12px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}
.email-meta div {
    margin-bottom: 4px;
}
.document-box.notice {
    border-left: 4px solid var(--color-warning);
    background: var(--color-panel-solid);
}
.document-box.timetable {
    font-family: monospace;
    font-size: 0.85rem;
}

/* Sprechen Card UI styling */
.sprechen-card-display {
    margin: auto 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}
.speaking-card-wrapper {
    width: 280px;
    height: 180px;
    perspective: 1000px;
}
.speaking-card-front {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-panel-solid) 0%, var(--color-bg-solid) 100%);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.speaking-card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--color-accent-light) 0%, transparent 60%);
    opacity: 0.3;
    pointer-events: none;
}
.card-badge {
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--radius-full);
}
.card-main-symbol {
    font-size: 3rem;
}
.card-word {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}
.card-instruction {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}
.speaking-tips {
    max-width: 320px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* Right Panel: Interactive Q&A Area */
.qa-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 24px;
}
.qa-meta {
    display: flex;
    gap: 8px;
}
.qa-tag {
    background: var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}
.qa-tag.category-tag {
    background: var(--color-accent-light);
    color: var(--color-accent);
}
.mark-review-btn {
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color var(--transition-fast);
}
.mark-review-btn:hover {
    color: var(--color-warning);
}
.mark-review-btn.flagged {
    color: var(--color-warning);
}

.question-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}
.question-body h3 {
    font-size: 1.15rem;
    margin-bottom: 20px;
    line-height: 1.4;
}

/* MC Option card selectors */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.option-item {
    display: flex;
    align-items: center;
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    user-select: none;
}
.option-item:hover {
    border-color: var(--color-text-muted);
    background: var(--color-panel-hover);
}
.option-item.selected {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
    box-shadow: 0 0 0 1px var(--color-accent);
}
.option-radio {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-border);
    margin-right: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}
.option-item.selected .option-radio {
    border-color: var(--color-accent);
}
.option-item.selected .option-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}
.option-content {
    font-size: 0.9rem;
    font-weight: 500;
}
.option-letter {
    font-weight: 700;
    color: var(--color-accent);
    margin-right: 6px;
}

/* Matching Questions drop down selector styling */
.matching-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.matching-row {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 16px;
    padding: 12px;
    border-bottom: 1px solid var(--color-border);
}
.matching-desc {
    font-size: 0.9rem;
}
.matching-select {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-family: var(--font-body);
}

/* Form Filling Part A fields */
.schreiben-form-inputs {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.schreiben-form-row {
    display: grid;
    grid-template-columns: 180px 1fr;
    align-items: center;
    gap: 16px;
}
.schreiben-form-row label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}
.schreiben-form-row input {
    padding: 10px;
    border-radius: var(--radius-md);
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

/* Schreib Text Editor Part B */
.schreiben-editor-wrapper {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}
.text-editor {
    flex: 1;
    min-height: 220px;
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    resize: none;
    line-height: 1.6;
}
.editor-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}
.save-status {
    color: var(--color-success);
}
.editor-actions {
    display: flex;
    gap: 12px;
}

/* Sprechen Voice Recorder interface */
.recorder-card {
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    text-align: center;
}

.recording-state-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.duration-label {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
}

/* Live recorder audio wave effect */
.recording-wave {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 40px;
}
.recording-wave span {
    display: block;
    width: 6px;
    height: 10px;
    background: var(--color-danger);
    border-radius: var(--radius-full);
    animation: bounce 0.6s ease infinite alternate;
}
.recording-wave span:nth-child(2) { animation-delay: 0.15s; }
.recording-wave span:nth-child(3) { animation-delay: 0.3s; }
.recording-wave span:nth-child(4) { animation-delay: 0.45s; }
.recording-wave span:nth-child(5) { animation-delay: 0.6s; }

@keyframes bounce {
    0% { height: 10px; }
    100% { height: 40px; }
}

.recorder-controls {
    display: flex;
    gap: 16px;
}
.recorder-btn {
    padding: 12px 24px;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    font-weight: 700;
    font-family: var(--font-body);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
    transition: all var(--transition-fast);
}
.recorder-btn.record {
    background: var(--color-danger);
}
.recorder-btn.record:hover:not(:disabled) {
    background: #be123c;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}
.recorder-btn.stop {
    background: var(--color-text-secondary);
}
.recorder-btn.stop:hover:not(:disabled) {
    background: var(--color-text-primary);
}
.recorder-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}
.audio-playback-section {
    width: 100%;
    border-top: 1px dashed var(--color-border);
    padding-top: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.audio-playback-section p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}
.audio-playback-section audio {
    width: 100%;
    border-radius: var(--radius-full);
}
.download-link {
    font-size: 0.8rem;
    padding: 8px 16px;
}

/* ==================== 9. REVIEW BOARD ==================== */
.review-dashboard {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 40px;
}
.review-dashboard h2 {
    font-size: 2rem;
    margin-bottom: 4px;
}

.review-summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 24px;
    margin-bottom: 40px;
}
.summary-card {
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
}
.summary-card .num {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-success);
    line-height: 1.1;
}
.summary-card.warning .num {
    color: var(--color-danger);
}
.summary-card.info .num {
    color: var(--color-warning);
}
.summary-card .label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: 8px;
}

.review-grids-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}
.review-module-block {
    background: rgba(var(--color-bg-solid), 0.1);
    border-radius: var(--radius-lg);
}
.review-module-block h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--color-text-secondary);
    border-left: 4px solid var(--color-accent);
    padding-left: 12px;
}
.review-question-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
    gap: 10px;
}

.review-submission-box {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}
.warning-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}
.submit-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* ==================== 10. RESULTS DASHBOARD ==================== */
.results-dashboard {
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    padding: 40px;
}

/* Printable Certificate Card */
.certificate-container {
    background: #ffffff;
    color: #111827;
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 40px;
    position: relative;
    border: 1px solid #e5e7eb;
}

.cert-border {
    border: 4px double #4b5563;
    padding: 30px;
    border-radius: var(--radius-md);
}

.cert-header {
    text-align: center;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 24px;
    margin-bottom: 24px;
}
.cert-logo {
    display: inline-block;
    background: #4f46e5;
    color: #ffffff;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}
.cert-header h2 {
    font-size: 1.5rem;
    letter-spacing: 2px;
    color: #374151;
}
.cert-header h3 {
    font-size: 1rem;
    color: #6b7280;
    margin-top: 4px;
}

.cert-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.cert-candidate {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: #1f2937;
}
.cert-date {
    font-size: 0.95rem;
    color: #6b7280;
    margin-bottom: 30px;
}

.cert-score-main {
    margin-bottom: 30px;
}
.score-circle {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-full);
    border: 6px solid #4f46e5;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}
.score-num {
    font-family: var(--font-heading);
    font-size: 1.45rem;
    font-weight: 700;
    color: #111827;
}
.score-percent {
    font-size: 0.95rem;
    color: #4f46e5;
    font-weight: 600;
}
.score-label {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: #10b981;
}
.score-label.fail {
    color: #ef4444;
}

.results-breakdown-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    width: 100%;
    margin-top: 16px;
}
.breakdown-card {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: var(--radius-md);
    padding: 16px 12px;
}
.breakdown-card h4 {
    font-size: 0.85rem;
    color: #4b5563;
    margin-bottom: 8px;
}
.breakdown-score {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}
.breakdown-status.completed {
    color: #10b981;
    font-size: 0.8rem;
    font-weight: 600;
}
.progress-bar-small {
    height: 6px;
    background: #e5e7eb;
    border-radius: var(--radius-full);
    margin-top: 8px;
    overflow: hidden;
}
.progress-bar-small .fill {
    height: 100%;
    background: #4f46e5;
}

/* Online Analytics dashboard styling */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.dashboard-card {
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
}
.dashboard-card h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.stat-detail-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.strength-weakness-lists {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.list-column h4 {
    font-size: 0.85rem;
    margin-bottom: 12px;
}
.tag-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag-list li {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }

#grammar-strengths-list li, #vocab-strengths-list li, #portal-strengths-list li {
    background: var(--color-success-light);
    color: var(--color-success);
}
#grammar-weaknesses-list li, #vocab-weaknesses-list li, #portal-weaknesses-list li {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

/* Topic accuracy chart styling using SVG styles */
.svg-chart-card {
    grid-column: span 2;
}
.svg-chart-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.chart-bar-row {
    display: grid;
    grid-template-columns: 150px 1fr 50px;
    align-items: center;
    gap: 16px;
}
.chart-bar-label {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.chart-bar-track {
    height: 12px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.chart-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-success) 100%);
    border-radius: var(--radius-full);
    width: 0%;
    transition: width var(--transition-slow);
}
.chart-bar-val {
    font-size: 0.85rem;
    font-weight: 600;
    text-align: right;
}

.results-actions {
    margin-top: 32px;
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* --- Sticky Bottom Navigation Footer --- */
.app-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: rgba(var(--color-bg-solid), 0.35);
    border-top: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
    z-index: 1000;
}
.footer-center-indicator {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 600;
}

/* --- Confirmation Modals --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-card {
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    max-width: 450px;
    width: calc(100% - 40px);
    padding: 32px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}
.modal-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.modal-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
}
.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
}

/* Animations */
@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.03); opacity: 0.85; }
}

@keyframes bounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-4px); }
}

/* Responsive Overrides */
@media (max-width: 900px) {
    .dashboard-stats-row {
        grid-template-columns: 1fr;
    }
    .dashboard-modules-grid {
        grid-template-columns: 1fr;
    }
    .start-card-grid {
        grid-template-columns: 1fr;
    }
    .start-form-section {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }
    .exam-workspace-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .workspace-stimulus, 
    .workspace-qa {
        max-height: none;
    }
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .svg-chart-card {
        grid-column: span 1;
    }
    .app-sidebar {
        position: absolute;
        left: -320px;
        top: 0;
        bottom: 0;
        z-index: 100;
        background: var(--color-bg-solid);
        box-shadow: var(--shadow-lg);
    }
    .app-sidebar.open {
        left: 0;
    }
}

@media (max-width: 600px) {
    .app-header {
        padding: 12px 16px;
    }
    .logo-text {
        display: none;
    }
    .header-stats {
        gap: 8px;
    }
    .stat-item {
        padding: 4px 8px;
        font-size: 0.75rem;
    }
    .results-breakdown-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .results-actions .btn {
        width: 100%;
    }
    .streak-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .mistakes-quick-banner {
        flex-direction: column;
        align-items: flex-start;
    }
    .mistakes-quick-banner button {
        width: 100%;
    }
}

/* --- Printer Friendly certificate styling --- */
@media print {
    body {
        background: #ffffff !important;
        color: #000000 !important;
        font-size: 12pt;
    }
    .app-header, 
    .progress-bar-container, 
    .app-sidebar, 
    .app-footer, 
    .no-print,
    .modal-overlay,
    .skip-link {
        display: none !important;
    }
    .main-layout {
        display: block !important;
    }
    .main-content {
        padding: 0 !important;
        overflow: visible !important;
    }
    .view-panel {
        display: none !important;
    }
    .view-panel#view-results-screen {
        display: block !important;
    }
    .results-dashboard {
        padding: 0 !important;
        max-width: 100% !important;
    }
    .certificate-container {
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
        width: 100% !important;
    }
    .cert-border {
        border: 4px double #000000 !important;
        padding: 20px !important;
    }
    .cert-logo {
        background: #000000 !important;
        color: #ffffff !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    .score-circle {
        border-color: #000000 !important;
    }
    .breakdown-card {
        background: #ffffff !important;
        border: 1px solid #000000 !important;
    }
    .progress-bar-small {
        border: 1px solid #000000 !important;
        background: #ffffff !important;
    }
    .progress-bar-small .fill {
        background: #000000 !important;
    }
}

/* ==================== 10. V2.1 LEARNING EXPERIENCE UPDATES ==================== */

/* Translation Assistant */
.english-text {
    font-size: 0.95rem;
    font-style: italic;
    color: var(--color-success) !important;
    background: rgba(16, 185, 129, 0.05);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin-top: 10px;
    border-left: 3px solid var(--color-success);
    animation: fadeIn 0.2s ease-out;
}

.btn-translate-assist {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
    min-height: 36px; /* Touch target helper for inline buttons */
}
.btn-translate-assist:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    border-color: var(--color-text-secondary);
}

/* Topic Hub */
.hub-action-card {
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    gap: 8px;
    height: 100%;
}
.hub-action-card:hover, .hub-action-card:focus-visible {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}
.hub-action-card:active {
    transform: translateY(-1px) scale(0.99);
}

/* Learning Workspace */
.learning-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

/* Vocab Learn card */
.vocab-learn-card {
    text-align: center;
    padding: 24px 0;
}
.vocab-learn-german {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 16px;
    font-family: var(--font-display);
    letter-spacing: -0.5px;
}

/* Vocab Support grid */
.vocab-support-section {
    margin-top: 28px;
}
.vocab-support-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}
.vocab-support-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    transition: background var(--transition-fast);
}
.vocab-support-item:hover {
    background: rgba(255, 255, 255, 0.04);
}

/* Large Speak Buttons for Vocabulary */
.btn-touch-audio {
    min-height: 48px;
    min-width: 140px;
    font-size: 0.95rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
}

/* Keyframe animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsiveness overrides */
@media (max-width: 768px) {
    .learning-container {
        padding: 20px;
    }
    .vocab-learn-german {
        font-size: 2.25rem;
    }
    .vocab-support-list {
        grid-template-columns: 1fr;
    }
    .learning-navigation {
        flex-direction: column;
    }
    .learning-navigation button {
        width: 100% !important;
    }
}

/* ==================== 11. V2.2 LEARNING ACCELERATION EXPERIENCE ==================== */

/* Pronunciation Helper Guide */
.pronunciation-subtext {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-success);
    margin-top: 4px;
    letter-spacing: 0.02em;
    font-style: normal;
    text-transform: none;
    opacity: 0.9;
}
body.light-mode .pronunciation-subtext {
    color: #047857; /* Darker green for readability in light mode */
}

/* Phrase cards & Bank layout */
.phrase-card {
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    transition: all var(--transition-fast);
}
.phrase-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}
.phrase-card-german {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}
.phrase-card-english {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-top: 8px;
}
.phrase-favorite-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--color-text-muted);
    transition: transform 0.2s;
    padding: 4px;
}
.phrase-favorite-btn.active {
    color: #eab308;
    transform: scale(1.15);
}
.phrase-favorite-btn:hover {
    transform: scale(1.1);
}

/* Category pills */
.category-pill {
    padding: 8px 16px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--color-text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
    font-size: 0.85rem;
    font-weight: 600;
}
.category-pill:hover, .category-pill.active {
    background: var(--color-primary);
    border-color: var(--color-primary-light);
    color: var(--color-text-primary);
}

/* Picture cards grid & layout */
.vocab-picture-card {
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all var(--transition-fast);
}
.vocab-picture-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}
.vocab-picture-wrapper {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.1);
    border: 2px solid var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin-bottom: 16px;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.2);
}

/* Subtitle and dialog transcripts */
.transcript-bubble {
    display: flex;
    flex-direction: column;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    background: rgba(255,255,255,0.02);
    border-left: 3px solid var(--color-border);
    transition: background var(--transition-fast);
}
.transcript-bubble.active-speaker {
    background: rgba(99, 102, 241, 0.04);
    border-left-color: var(--color-primary);
}
.transcript-german-line {
    font-weight: 600;
    color: var(--color-text-primary);
}
.transcript-english-line {
    font-size: 0.88rem;
    font-style: italic;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* Tab buttons for lessons/scenarios */
.tab-btn {
    border-radius: var(--radius-md);
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

/* Settings Checkbox target helper */
#settings-pronunciation-helper-checkbox {
    min-width: 24px;
    min-height: 24px;
}

/* Option Card styling for V2.2 quiz panels to fix text readability */
.option-card {
    background: var(--color-panel-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-primary) !important;
    font-family: var(--font-body);
    font-weight: 500;
}
.option-card:hover {
    border-color: var(--color-text-muted);
    background: var(--color-panel-hover);
}
.option-card.selected {
    border-color: var(--color-accent) !important;
    background: var(--color-accent-light) !important;
    box-shadow: 0 0 0 1px var(--color-accent);
}