/* English Quest - Abitur Preparation Game Styles */

:root {
    /* Colors - Educational & Modern */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --danger: #ef4444;
    --success: #22c55e;

    /* Neutrals */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;

    /* Topic Colors */
    --american-dream: #dc2626;
    --british-culture: #2563eb;
    --globalization: #059669;
    --shakespeare: #7c3aed;
    --grammar: #0891b2;
    --stylistic-devices: #c026d3;
    --text-analysis: #ea580c;
    --utopia-dystopia: #4f46e5;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;

    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Admin Page */
.admin-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.admin-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.admin-subtitle {
    color: var(--text-muted);
}

.admin-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.admin-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.admin-form {
    display: grid;
    gap: var(--spacing-sm);
    max-width: 320px;
}

.admin-form input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.admin-metric {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
}

.admin-metric-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.admin-metric-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.admin-table th,
.admin-table td {
    text-align: left;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.admin-mono {
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.admin-muted {
    color: var(--text-muted);
}

.admin-error {
    color: var(--danger);
    margin-bottom: var(--spacing-sm);
}

@media (max-width: 720px) {
    .admin-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* App Container */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.player-stats {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.stat-icon {
    font-size: 1rem;
}

.stat-label {
    color: var(--text-muted);
    display: none;
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

.user-menu {
    cursor: pointer;
    text-decoration: none;
}

.user-menu:hover {
    background: var(--primary-light);
    background: rgba(37, 99, 235, 0.1);
}

.logo-link {
    text-decoration: none;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Screens */
.screen {
    display: none;
    animation: fadeIn 0.3s ease;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Welcome Card */
.welcome-card {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.welcome-card h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.welcome-card p {
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.xp-bar-container {
    max-width: 400px;
    margin: 0 auto;
}

.xp-bar {
    height: 12px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.xp-progress {
    height: 100%;
    background: var(--accent);
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
}

.xp-text {
    font-size: 0.875rem;
    opacity: 0.9;
    display: block;
    margin-top: var(--spacing-xs);
}

/* Topic Grid */
.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.topic-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all 0.2s ease;
}

.topic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.topic-card[data-topic="american_dream"] { border-left: 4px solid var(--american-dream); }
.topic-card[data-topic="british_culture"] { border-left: 4px solid var(--british-culture); }
.topic-card[data-topic="globalization"] { border-left: 4px solid var(--globalization); }
.topic-card[data-topic="shakespeare"] { border-left: 4px solid var(--shakespeare); }
.topic-card[data-topic="grammar"] { border-left: 4px solid var(--grammar); }
.topic-card[data-topic="stylistic_devices"] { border-left: 4px solid var(--stylistic-devices); }
.topic-card[data-topic="text_analysis"] { border-left: 4px solid var(--text-analysis); }
.topic-card[data-topic="utopia_dystopia"] { border-left: 4px solid var(--utopia-dystopia); }

.topic-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.topic-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.topic-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.topic-progress {
    margin-top: var(--spacing-sm);
}

.progress-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar .progress {
    height: 100%;
    background: var(--secondary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 0.5s ease;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--border);
}

.btn-tertiary {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-tertiary:hover:not(:disabled) {
    background: var(--primary);
    color: white;
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

.btn-icon {
    background: transparent;
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    font-size: 1.25rem;
}

.btn-icon:hover {
    color: var(--text-primary);
}

.btn-hint {
    background: var(--accent);
    color: white;
}

.btn-hint:hover:not(:disabled) {
    background: var(--accent-dark);
}

.btn-formula {
    background: var(--secondary);
    color: white;
}

.btn-formula:hover:not(:disabled) {
    background: var(--secondary-dark);
}

.btn-submit {
    min-width: 180px;
}

/* Quest Screen */
.quest-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.quest-meta {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.quest-topic {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}

.quest-difficulty {
    color: var(--accent);
    letter-spacing: 2px;
}

.quest-timer {
    font-size: 1.25rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.quest-timer.warning {
    color: var(--danger);
    background: #fef2f2;
}

.quest-content {
    max-width: 800px;
    margin: 0 auto;
}

.quest-question-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.quest-question {
    font-size: 1.125rem;
    line-height: 1.8;
}

/* Multiple Choice Options */
.quest-options {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.option-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.option-btn:hover {
    border-color: var(--primary-light);
    background: var(--bg-tertiary);
}

.option-btn.selected {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.option-letter {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-weight: 600;
    color: var(--text-secondary);
}

.option-btn.selected .option-letter {
    background: var(--primary);
    color: white;
}

.option-text {
    flex: 1;
}

/* Answer Input */
.answer-input-container {
    margin-bottom: var(--spacing-lg);
}

.answer-input-container label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.answer-input {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.125rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color 0.2s ease;
}

.answer-input:focus {
    outline: none;
    border-color: var(--primary);
}

.input-help {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* Quest Actions */
.quest-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

/* Hint Display */
.hint-display {
    background: #fef3c7;
    border: 1px solid #fcd34d;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.hint-display.hidden {
    display: none;
}

.hint-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.hint-item:last-child {
    margin-bottom: 0;
}

.hint-number {
    font-weight: 600;
    color: var(--accent-dark);
}

/* Result Screen */
.result-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.result-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.result-icon.correct {
    color: var(--success);
}

.result-icon.incorrect {
    color: var(--danger);
}

.result-card h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.result-feedback {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.correct-answer,
.explanation {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.correct-answer h4,
.explanation h4 {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.answer-display {
    font-size: 1.125rem;
}

.rewards-display {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.reward-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.reward-icon {
    font-size: 1.5rem;
}

.reward-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--success);
}

.achievements-display {
    margin-bottom: var(--spacing-lg);
}

.achievement-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: white;
    border-radius: var(--radius-full);
    margin: var(--spacing-xs);
    animation: popIn 0.3s ease;
}

@keyframes popIn {
    from { transform: scale(0); }
    to { transform: scale(1); }
}

.level-up-display {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    animation: glow 1s ease infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 20px rgba(37, 99, 235, 0.5); }
    to { box-shadow: 0 0 40px rgba(37, 99, 235, 0.8); }
}

.level-up-animation {
    font-size: 3rem;
    animation: bounce 0.5s ease infinite alternate;
}

@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(-10px); }
}

.result-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Vocabulary Screen */
.formula-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.formula-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    border-color: var(--primary-light);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.vocabulary-list {
    display: grid;
    gap: var(--spacing-md);
}

.vocab-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.vocab-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.vocab-meaning {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.vocab-de, .vocab-en {
    flex: 1;
}

.vocab-de strong, .vocab-en strong {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.vocab-example {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-lg);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
}

.related-vocab {
    padding: var(--spacing-lg);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.info {
    border-left: 4px solid var(--primary);
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .player-stats {
        width: 100%;
        justify-content: center;
    }

    .stat-item {
        padding: var(--spacing-xs);
        font-size: 0.75rem;
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .welcome-card {
        padding: var(--spacing-lg);
    }

    .welcome-card h2 {
        font-size: 1.25rem;
    }

    .topic-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
    }

    .quest-header {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .quest-question-card {
        padding: var(--spacing-lg);
    }

    .quest-actions {
        flex-direction: column;
    }

    .quest-actions .btn {
        width: 100%;
    }

    .result-card {
        padding: var(--spacing-lg);
    }

    .rewards-display {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .formula-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--spacing-sm);
    }

    .tab-btn {
        white-space: nowrap;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .logo {
        font-size: 1.25rem;
    }

    .stat-item .stat-icon {
        font-size: 0.875rem;
    }

    .topic-icon {
        font-size: 2rem;
    }

    .quest-timer {
        font-size: 1rem;
    }
}

/* Desktop Improvements */
@media (min-width: 1024px) {
    .stat-label {
        display: inline;
    }

    .main-content {
        padding: var(--spacing-xl);
    }

    .welcome-card {
        padding: var(--spacing-2xl);
    }

    .topic-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1400px) {
    .main-content {
        max-width: 1400px;
    }
}

/* ========================
   Auth Pages (Login/Register)
   ======================== */
.auth-body {
    background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 50%, #f5f7fa 100%);
    min-height: 100vh;
}

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    text-decoration: none;
}

.auth-brand-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.auth-brand-text {
    display: flex;
    flex-direction: column;
}

.auth-brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e293b;
}

.auth-brand-tagline {
    font-size: 0.875rem;
    color: #64748b;
}

.auth-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.auth-card-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-card-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.auth-card-header p {
    color: #64748b;
    font-size: 0.9375rem;
}

.auth-alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.auth-alert-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
}

.auth-alert-icon {
    width: 20px;
    height: 20px;
    background: #dc2626;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.auth-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.auth-field label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
}

.auth-optional {
    color: #9ca3af;
    font-weight: 400;
}

.auth-field input {
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
    color: #1e293b;
    transition: all 0.15s ease;
    background: white;
}

.auth-field input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.auth-field input::placeholder {
    color: #9ca3af;
}

.auth-submit {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    margin-top: 0.5rem;
}

.auth-submit:hover {
    background: linear-gradient(135deg, #1d4ed8, #1e40af);
    transform: translateY(-1px);
}

.auth-submit:active {
    transform: translateY(0);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e5e7eb;
}

.auth-divider span {
    color: #9ca3af;
    font-size: 0.875rem;
}

.auth-links {
    text-align: center;
}

.auth-links p {
    color: #6b7280;
    font-size: 0.9375rem;
}

.auth-links a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
}

.auth-links a:hover {
    text-decoration: underline;
}

.auth-back {
    display: block;
    text-align: center;
    margin-top: 1.5rem;
    color: #6b7280;
    font-size: 0.875rem;
    text-decoration: none;
}

.auth-back:hover {
    color: #2563eb;
}

/* ========================
   Profile Page
   ======================== */
.profile-hero {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    color: white;
}

.profile-hero-avatar {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.profile-hero-info h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.profile-hero-email {
    opacity: 0.9;
    margin-bottom: 0.25rem;
}

.profile-hero-date {
    font-size: 0.875rem;
    opacity: 0.75;
}

.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.profile-stat-box {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
}

.profile-stat-header {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
    margin-bottom: 0.5rem;
}

.profile-stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: #2563eb;
}

.profile-stat-bar {
    height: 6px;
    background: #e5e7eb;
    border-radius: 3px;
    margin: 0.75rem 0;
    overflow: hidden;
}

.profile-stat-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #2563eb, #3b82f6);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.profile-stat-sub {
    font-size: 0.75rem;
    color: #6b7280;
}

.profile-section {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.profile-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.profile-topics {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.profile-topic-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: #f8fafc;
    border-radius: 8px;
}

.profile-topic-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.profile-topic-icon {
    font-size: 1.25rem;
}

.profile-topic-name {
    font-weight: 500;
    color: #374151;
}

.profile-topic-stats {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.profile-topic-count {
    color: #6b7280;
    font-size: 0.875rem;
}

.profile-topic-pct {
    font-weight: 600;
    font-size: 0.875rem;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
}

.profile-topic-pct.good {
    background: #dcfce7;
    color: #16a34a;
}

.profile-topic-pct.low {
    background: #fef3c7;
    color: #d97706;
}

.profile-activity {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.profile-activity-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    background: #f8fafc;
    border-radius: 6px;
    font-size: 0.875rem;
}

.profile-activity-row.correct {
    border-left: 3px solid #22c55e;
}

.profile-activity-row.wrong {
    border-left: 3px solid #ef4444;
}

.profile-activity-icon {
    font-weight: 700;
    width: 20px;
    text-align: center;
}

.profile-activity-row.correct .profile-activity-icon {
    color: #22c55e;
}

.profile-activity-row.wrong .profile-activity-icon {
    color: #ef4444;
}

.profile-activity-quest {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #374151;
}

.profile-activity-topic {
    color: #6b7280;
}

.profile-activity-xp {
    color: #22c55e;
    font-weight: 500;
}

.profile-activity-time {
    color: #9ca3af;
    font-size: 0.75rem;
}

.profile-empty {
    text-align: center;
    padding: 3rem 1.5rem;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
}

.profile-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.profile-empty h2 {
    font-size: 1.25rem;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.profile-empty p {
    color: #6b7280;
    margin-bottom: 1.5rem;
}

/* Responsive Auth/Profile */
@media (max-width: 640px) {
    .auth-card {
        padding: 1.5rem;
    }

    .profile-hero {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
    }

    .profile-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .profile-activity-row {
        flex-wrap: wrap;
    }

    .profile-activity-quest {
        order: 5;
        width: 100%;
        margin-top: 0.25rem;
    }
}

/* Print Styles */
@media print {
    .header,
    .action-buttons,
    .btn,
    .toast-container {
        display: none !important;
    }

    .vocab-card {
        break-inside: avoid;
        border: 1px solid #000;
    }
}

/* ========================
   AI Assistant Styles
   ======================== */

/* AI Button */
.btn-ai {
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
    color: white;
    border: none;
}

.btn-ai:hover {
    background: linear-gradient(135deg, #7c3aed, #5b21b6);
    transform: translateY(-1px);
}

/* AI Analysis Display */
.ai-analysis {
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    border: 1px solid #c4b5fd;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    text-align: left;
}

.ai-analysis h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #5b21b6;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ai-analysis-content {
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.ai-analysis-content p {
    margin-bottom: var(--spacing-sm);
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #c4b5fd;
    border-radius: 50%;
    border-top-color: #7c3aed;
    animation: spin 0.8s linear infinite;
    margin-right: 0.5rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Chat Modal */
.chat-modal-content {
    max-width: 500px;
    height: 500px;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background: #f8fafc;
}

.chat-welcome {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-xl);
    font-size: 0.9375rem;
}

.chat-message {
    max-width: 85%;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    line-height: 1.5;
    font-size: 0.9375rem;
}

.chat-message.user {
    align-self: flex-end;
    background: var(--primary);
    color: white;
    border-bottom-right-radius: var(--radius-sm);
}

.chat-message.assistant {
    align-self: flex-start;
    background: white;
    border: 1px solid var(--border);
    border-bottom-left-radius: var(--radius-sm);
}

.chat-message.loading {
    color: var(--text-muted);
    font-style: italic;
}

.chat-input-container {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-top: 1px solid var(--border);
    background: white;
}

.chat-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-family: var(--font-sans);
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary);
}

.chat-send-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    white-space: nowrap;
}

/* Responsive Chat */
@media (max-width: 640px) {
    .chat-modal-content {
        height: 80vh;
        max-height: 500px;
    }

    .chat-message {
        max-width: 90%;
    }
}

/* ========================
   Guest Mode Styles
   ======================== */

/* Guest Banner */
.guest-banner {
    background: linear-gradient(90deg, #fef3c7, #fde68a);
    border-bottom: 1px solid #f59e0b;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    font-size: 0.875rem;
    color: #92400e;
}

.guest-banner a {
    color: #d97706;
    font-weight: 600;
    text-decoration: underline;
}

.guest-banner a:hover {
    color: #b45309;
}

/* Guest Register Prompt (in result screen) */
.guest-register-prompt {
    background: linear-gradient(135deg, #ecfdf5, #d1fae5);
    border: 2px solid #10b981;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.register-prompt-content h3 {
    font-size: 1.25rem;
    color: #065f46;
    margin-bottom: var(--spacing-sm);
}

.register-prompt-content p {
    color: #047857;
    margin-bottom: var(--spacing-lg);
}

.register-prompt-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.register-prompt-actions .btn-primary {
    background: linear-gradient(135deg, #10b981, #059669);
    font-size: 1.125rem;
    padding: var(--spacing-md) var(--spacing-xl);
}

.register-prompt-actions .btn-primary:hover {
    background: linear-gradient(135deg, #059669, #047857);
}

.register-prompt-actions .btn-secondary {
    font-size: 0.875rem;
}

/* Login Required Modal */
.login-modal-content {
    max-width: 420px;
    text-align: center;
}

.login-modal-body {
    padding: var(--spacing-lg);
}

.login-modal-body > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.login-modal-benefits {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.benefit-item {
    padding: var(--spacing-xs) 0;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.login-modal-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.login-modal-actions .btn-primary {
    font-size: 1.0625rem;
    padding: var(--spacing-md) var(--spacing-xl);
}

.login-modal-actions .btn-secondary {
    font-size: 0.875rem;
    background: transparent;
    color: var(--primary);
}

.login-modal-actions .btn-secondary:hover {
    background: var(--bg-tertiary);
}

/* Responsive Guest Styles */
@media (max-width: 640px) {
    .guest-register-prompt {
        padding: var(--spacing-lg);
    }

    .register-prompt-content h3 {
        font-size: 1.125rem;
    }

    .login-modal-content {
        margin: var(--spacing-md);
    }
}