/**
 * BEGAT - Biblical Genealogy Game
 * Main Stylesheet
 *
 * CSS Variables define the color scheme and can be overridden
 * for accessibility modes (high contrast, colorblind).
 */

/* ==============================================
   CSS RESET & VARIABLES
   ============================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

:root {
    --parchment: #f4e4bc;
    --parchment-dark: #d4c4a0;
    --ink: #2c1810;
    --gold: #d4af37;
    --gold-glow: rgba(212, 175, 55, 0.6);
    --night-sky: #1a1a2e;
    --night-deep: #0f0f1a;
    --star-white: #fffef0;
    --success: #4a7c59;
    --error: #8b4049;
    --slot-empty: rgba(244, 228, 188, 0.2);
    --slot-ready: rgba(212, 175, 55, 0.4);
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: 'Georgia', 'Times New Roman', serif;
    background: var(--night-deep);
}

body {
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--night-sky) 0%, var(--night-deep) 100%);
    position: relative;
}

/* ==============================================
   STARRY BACKGROUND ANIMATION
   ============================================== */

.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.star {
    position: absolute;
    background: var(--star-white);
    border-radius: 50%;
    animation: twinkle 3s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* ==============================================
   HEADER & SCORE DISPLAY
   ============================================== */

.header {
    padding: 1rem;
    text-align: center;
    z-index: 10;
    background: linear-gradient(180deg, rgba(26, 26, 46, 0.95) 0%, transparent 100%);
}

.header h1 {
    font-size: 2rem;
    color: var(--gold);
    letter-spacing: 0.2em;
    margin-bottom: 0.25rem;
}

.header .subtitle {
    font-size: 1rem;
    color: var(--parchment);
    opacity: 0.8;
}

.score-display {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 0.5rem;
    font-size: 1.1rem;
    color: var(--gold);
}

/* ==============================================
   TIMER DISPLAY
   ============================================== */

.timer-display {
    font-family: 'Courier New', monospace;
    font-size: 1.3rem;
    color: var(--gold);
    background: rgba(0, 0, 0, 0.3);
    padding: 0.3rem 0.8rem;
    border-radius: 8px;
    border: 2px solid var(--gold);
    margin-top: 0.5rem;
    display: inline-block;
}

.timer-display.warning {
    animation: timer-flash 0.5s ease-in-out infinite;
    border-color: #ff4444;
    color: #ff4444;
}

@keyframes timer-flash {
    0%, 100% { opacity: 1; background: rgba(255, 68, 68, 0.2); }
    50% { opacity: 0.6; background: rgba(255, 68, 68, 0.4); }
}

.timer-display.bonus-eligible {
    color: #4aff4a;
    border-color: #4aff4a;
}

/* ==============================================
   MAIN GAME CONTAINER
   ============================================== */

.game-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    z-index: 5;
}

/* ==============================================
   TIMELINE AREA (Upper section - 65%)
   ============================================== */

.timeline-area {
    flex: 0 0 65%;
    padding: 1rem;
    overflow-x: auto;
    overflow-y: hidden;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    -webkit-overflow-scrolling: touch;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

.timeline-wrapper {
    display: flex;
    flex-direction: column;
    min-width: max-content;
}

.timeline {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    min-width: max-content;
    align-items: center;
}

.timeline-slot {
    width: 5rem;
    height: 7rem;
    min-width: 5rem;
    border: 3px dashed var(--parchment-dark);
    border-radius: 12px;
    background: var(--slot-empty);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

.timeline-slot.fixed {
    background: var(--parchment);
    border: 3px solid var(--gold);
}

.timeline-slot.ready {
    background: var(--slot-ready);
    border-color: var(--gold);
}

.timeline-slot.filled {
    background: var(--parchment);
    border: 3px solid var(--success);
}

/* Slot contents - pointer-events none to allow touch to pass through */
.slot-name {
    font-size: 0.85rem;
    color: var(--ink);
    text-align: center;
    font-weight: bold;
    padding: 0.25rem;
    pointer-events: none;
}

.slot-icon {
    width: 2.5rem;
    height: 2.5rem;
    margin-bottom: 0.25rem;
    pointer-events: none;
}

.connector {
    width: 1.5rem;
    height: 3px;
    background: linear-gradient(90deg, var(--gold), var(--parchment-dark));
    flex-shrink: 0;
}

/* ==============================================
   CARD POOL AREA (Lower section - 35%)
   ============================================== */

.card-pool-area {
    flex: 0 0 35%;
    background: linear-gradient(0deg, rgba(15, 15, 26, 0.95) 0%, rgba(26, 26, 46, 0.8) 100%);
    border-top: 2px solid var(--gold);
    padding: 0.75rem;
    overflow-y: auto;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

.card-pool-label {
    color: var(--parchment);
    font-size: 1rem;
    text-align: center;
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.card-pool {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    padding-bottom: 1rem;
}

/* Time scale with date markers */
.time-scale {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 0 1rem;
    margin-bottom: 0.5rem;
    height: 2rem;
    border-bottom: 2px solid var(--gold);
    position: relative;
    min-width: max-content;
    width: 100%;
}

.time-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.time-marker::after {
    content: '';
    width: 2px;
    height: 8px;
    background: var(--gold);
    position: absolute;
    bottom: -2px;
}

.time-marker-label {
    font-size: 0.65rem;
    color: var(--gold);
    white-space: nowrap;
    margin-bottom: 4px;
}

/* ==============================================
   CARDS (Draggable ancestor cards)
   ============================================== */

.card {
    width: 4.5rem;
    height: 6rem;
    min-width: 4.5rem;
    background: linear-gradient(135deg, var(--parchment) 0%, var(--parchment-dark) 100%);
    border: 2px solid var(--gold);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

.card.locked {
    background: linear-gradient(135deg, #3a3a5a 0%, #2a2a4a 100%);
    -webkit-user-drag: none;
}

.card.locked .card-icon {
    opacity: 0.5;
}

.card.unlocked {
    border-color: var(--gold);
}

.card.dragging {
    transform: scale(1.1);
    z-index: 100;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.card-icon {
    width: 2rem;
    height: 2rem;
    margin-bottom: 0.25rem;
}

.card-name {
    font-size: 0.7rem;
    color: var(--ink);
    text-align: center;
    font-weight: bold;
    padding: 0 0.25rem;
}

.card.locked .card-name {
    color: var(--parchment);
    opacity: 0.6;
}

.card-question-mark {
    font-size: 1.5rem;
    color: var(--gold);
    opacity: 0.8;
}

/* ==============================================
   QUIZ MODAL
   ============================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.quiz-modal {
    background: var(--parchment);
    border-radius: 20px;
    padding: 1.5rem;
    max-width: 95%;
    width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    border: 4px solid var(--gold);
}

.quiz-header {
    text-align: center;
    margin-bottom: 1rem;
}

.quiz-header h2 {
    color: var(--ink);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.quiz-description {
    font-size: 1.25rem;
    color: var(--ink);
    line-height: 1.6;
    padding: 1rem;
    background: rgba(212, 175, 55, 0.2);
    border-radius: 10px;
    margin-bottom: 1rem;
    text-align: center;
}

.quiz-question {
    font-size: 1.1rem;
    color: var(--ink);
    text-align: center;
    margin-bottom: 1rem;
    font-style: italic;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.quiz-option {
    padding: 1rem 1.5rem;
    font-size: 1.25rem;
    background: linear-gradient(135deg, #f8f0e0 0%, var(--parchment) 100%);
    border: 3px solid var(--parchment-dark);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    color: var(--ink);
    min-height: 3.5rem;
}

.quiz-option:active {
    transform: scale(0.98);
}

.quiz-option.correct {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.quiz-option.wrong {
    background: var(--error);
    color: white;
    border-color: var(--error);
    animation: shake 0.5s ease;
}

.quiz-option.assisted-highlight {
    background: var(--gold);
    color: var(--ink);
    border-color: var(--gold);
    animation: pulse-gold 1s ease-in-out infinite;
}

@keyframes pulse-gold {
    0%, 100% { box-shadow: 0 0 5px var(--gold); }
    50% { box-shadow: 0 0 20px var(--gold), 0 0 30px var(--gold-glow); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-10px); }
    40%, 80% { transform: translateX(10px); }
}

.quiz-feedback {
    text-align: center;
    margin-top: 1rem;
    font-size: 1.25rem;
    font-weight: bold;
}

.quiz-feedback.success {
    color: var(--success);
}

.quiz-feedback.error {
    color: var(--error);
}

/* ==============================================
   NAVIGATION BUTTONS (Menu, Home, Share)
   ============================================== */

.menu-btn {
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: 3rem;
    height: 3rem;
    background: var(--parchment);
    border: 2px solid var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    font-size: 1.5rem;
    color: var(--ink);
}

.home-btn {
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 3rem;
    height: 3rem;
    background: var(--parchment);
    border: 2px solid var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    font-size: 1.2rem;
    color: var(--ink);
    text-decoration: none;
}

.music-btn {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: var(--parchment);
    border: 2px solid var(--gold);
    border-radius: 8px;
    cursor: pointer;
    z-index: 100;
    font-size: 0.9rem;
    color: var(--ink);
    font-family: 'Georgia', 'Times New Roman', serif;
}

.music-btn.playing {
    background: var(--gold);
}

.share-btn {
    position: fixed;
    bottom: 1rem;
    left: 1rem;
    width: 3rem;
    height: 3rem;
    background: var(--parchment);
    border: 2px solid var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    font-size: 1.3rem;
    color: var(--ink);
}

/* ==============================================
   SHARE MODAL
   ============================================== */

.share-modal {
    background: var(--parchment);
    border-radius: 20px;
    padding: 1.5rem;
    max-width: 95%;
    width: 350px;
    border: 4px solid var(--gold);
    text-align: center;
}

.share-title {
    font-size: 1.5rem;
    color: var(--ink);
    margin-bottom: 1rem;
}

.share-preview {
    max-width: 100%;
    max-height: 200px;
    border: 2px solid var(--gold);
    border-radius: 10px;
    margin-bottom: 1rem;
}

.share-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.share-option {
    padding: 1rem;
    font-size: 1.1rem;
    background: linear-gradient(135deg, #f8f0e0 0%, var(--parchment) 100%);
    border: 2px solid var(--parchment-dark);
    border-radius: 10px;
    cursor: pointer;
    text-align: center;
    color: var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.share-option:active {
    transform: scale(0.98);
}

.share-status {
    margin-top: 1rem;
    font-size: 1rem;
    color: var(--success);
}

/* ==============================================
   MENU MODAL
   ============================================== */

.menu-modal {
    background: var(--parchment);
    border-radius: 20px;
    padding: 1.5rem;
    max-width: 95%;
    width: 350px;
    max-height: 90vh;
    overflow-y: auto;
    border: 4px solid var(--gold);
}

.menu-title {
    text-align: center;
    font-size: 1.5rem;
    color: var(--ink);
    margin-bottom: 1rem;
}

.menu-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.instructions-content {
    text-align: left;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.instructions-content p {
    margin: 0.75rem 0;
}

.instructions-content ol,
.instructions-content ul {
    margin: 0.5rem 0 0.5rem 1.5rem;
    padding: 0;
}

.instructions-content li {
    margin: 0.4rem 0;
}

.menu-option {
    padding: 1rem;
    font-size: 1.2rem;
    background: linear-gradient(135deg, #f8f0e0 0%, var(--parchment) 100%);
    border: 2px solid var(--parchment-dark);
    border-radius: 10px;
    cursor: pointer;
    text-align: center;
    color: var(--ink);
}

.menu-option:active {
    transform: scale(0.98);
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--error);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==============================================
   WIN SCREEN MODAL
   ============================================== */

.win-modal {
    background: linear-gradient(135deg, var(--parchment) 0%, #fff8e7 100%);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    border: 4px solid var(--gold);
    animation: win-appear 0.5s ease;
}

@keyframes win-appear {
    from { transform: scale(0.5); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.win-title {
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 1rem;
}

.win-subtitle {
    font-size: 1.25rem;
    color: var(--ink);
    margin-bottom: 1rem;
}

.win-score {
    font-size: 1.5rem;
    color: var(--success);
    margin-bottom: 1.5rem;
}

.win-btn {
    padding: 1rem 2rem;
    font-size: 1.25rem;
    background: var(--gold);
    color: var(--ink);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
}

.win-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.win-camera-btn {
    padding: 0.8rem 1.2rem;
    font-size: 1.5rem;
    background: var(--parchment-dark);
    color: var(--ink);
    border: 2px solid var(--gold);
    border-radius: 10px;
    cursor: pointer;
}

.win-camera-btn:hover {
    background: var(--gold);
}

/* ==============================================
   HIGH SCORES SECTION
   ============================================== */

.high-scores {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    border: 1px solid var(--gold);
}

.high-scores h3 {
    color: var(--gold);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.high-scores-list {
    list-style: none;
    font-size: 0.9rem;
    color: var(--ink);
}

.high-scores-list li {
    padding: 0.3rem 0;
    display: flex;
    justify-content: space-between;
}

.high-scores-list .rank {
    color: var(--gold);
    font-weight: bold;
    width: 1.5rem;
}

.high-scores-list .name {
    flex: 1;
    text-align: left;
    margin-left: 0.5rem;
}

.high-scores-list .score {
    font-weight: bold;
}

/* ==============================================
   NAME ENTRY (High Score Input)
   ============================================== */

.name-entry {
    margin-top: 1rem;
    display: none;
}

.name-entry.active {
    display: block;
}

.name-entry label {
    display: block;
    color: var(--gold);
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
}

.name-entry input {
    padding: 0.5rem;
    font-size: 1rem;
    border: 2px solid var(--gold);
    border-radius: 5px;
    background: var(--parchment);
    color: var(--ink);
    width: 150px;
    text-align: center;
}

.name-entry button {
    margin-left: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    background: var(--gold);
    color: var(--ink);
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

/* ==============================================
   ACCESSIBILITY - Speaker Button
   ============================================== */

.speak-btn {
    background: var(--gold);
    border: none;
    border-radius: 50%;
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    font-size: 1.2rem;
    margin-left: 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ==============================================
   HINT DISPLAY (Feedback messages)
   ============================================== */

.hint-display {
    position: fixed;
    bottom: 40%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--parchment);
    color: var(--ink);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    font-size: 1.1rem;
    z-index: 500;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    border: 2px solid var(--gold);
    text-align: center;
    max-width: 90%;
}

.hint-display.visible {
    opacity: 1;
}

/* ==============================================
   LEVEL INDICATOR
   ============================================== */

.level-indicator {
    text-align: center;
    color: var(--parchment);
    font-size: 0.9rem;
    padding: 0.5rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    margin: 0 auto 0.5rem;
    max-width: 200px;
}

/* ==============================================
   PWA INSTALL PROMPT
   ============================================== */

.install-prompt {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--parchment);
    padding: 1rem;
    text-align: center;
    z-index: 1000;
    border-top: 2px solid var(--gold);
    display: none;
}

.install-prompt.visible {
    display: block;
}

.install-btn {
    background: var(--gold);
    color: var(--ink);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    margin-right: 0.5rem;
}

.dismiss-btn {
    background: transparent;
    border: 2px solid var(--ink);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
}

/* ==============================================
   LOADING SCREEN
   ============================================== */

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--night-deep);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: opacity 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-title {
    font-size: 3rem;
    color: var(--gold);
    margin-bottom: 1rem;
}

.loading-text {
    color: var(--parchment);
    font-size: 1.2rem;
}

/* ==============================================
   START SCREEN
   ============================================== */

.start-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--night-sky) 0%, var(--night-deep) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1500;
    transition: opacity 0.5s ease;
}

.start-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.start-title {
    font-size: 4rem;
    color: var(--gold);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 20px var(--gold-glow);
}

.start-subtitle {
    font-size: 1.5rem;
    color: var(--parchment);
    margin-bottom: 2rem;
    opacity: 0.9;
}

.start-btn {
    padding: 1.2rem 3rem;
    font-size: 1.5rem;
    background: #d4af37;
    color: #1a1a2e;
    border: 3px solid #d4af37;
    border-radius: 15px;
    cursor: pointer;
    font-weight: bold;
    font-family: inherit;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.5);
    animation: pulse-start 2s ease-in-out infinite;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.start-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px var(--gold-glow);
}

@keyframes pulse-start {
    0%, 100% { box-shadow: 0 5px 20px var(--gold-glow); }
    50% { box-shadow: 0 5px 35px var(--gold-glow); }
}

.start-level-info {
    margin-top: 2rem;
    color: var(--parchment);
    font-size: 1.1rem;
    opacity: 0.8;
}

.start-time-limit {
    margin-top: 0.5rem;
    color: var(--gold);
    font-size: 1rem;
}

.start-music-btn {
    margin-top: 2rem;
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
    background: transparent;
    color: var(--parchment);
    border: 2px solid var(--parchment);
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.3s ease;
    opacity: 0.7;
}

.start-music-btn:hover {
    opacity: 1;
    border-color: var(--gold);
    color: var(--gold);
}

.start-music-btn.playing {
    background: rgba(212, 175, 55, 0.2);
    border-color: var(--gold);
    color: var(--gold);
    opacity: 1;
}

/* ==============================================
   ACCESSIBILITY MODES
   ============================================== */

/* High contrast mode */
body.high-contrast {
    --parchment: #ffffff;
    --parchment-dark: #cccccc;
    --ink: #000000;
    --gold: #ffcc00;
}

/* Color blind mode */
body.colorblind {
    --success: #0066cc;
    --error: #cc6600;
}

/* ==============================================
   DATE TOOLTIP
   ============================================== */

.date-tooltip {
    position: fixed;
    background: rgba(15, 15, 26, 0.95);
    color: var(--gold);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: bold;
    z-index: 2000;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
    border: 2px solid var(--gold);
    white-space: nowrap;
    text-align: center;
}

.date-tooltip.visible {
    opacity: 1;
}

.date-tooltip .tooltip-date {
    display: block;
    margin-bottom: 0.25rem;
}

.date-tooltip .tooltip-note {
    display: block;
    font-size: 0.65rem;
    color: var(--parchment);
    font-weight: normal;
    font-style: italic;
    opacity: 0.8;
}

/* ==============================================
   RESPONSIVE - Tablet (768px+)
   ============================================== */

@media (min-width: 768px) {
    .card {
        width: 5.5rem;
        height: 7rem;
    }
    .timeline-slot {
        width: 6rem;
        height: 8rem;
    }
}

/* ==============================================
   RESPONSIVE - Mobile (600px and below)
   ============================================== */

@media (max-width: 600px) {
    /* Header */
    .header {
        padding: 0.5rem;
    }

    .header h1 {
        font-size: 1.3rem;
        letter-spacing: 0.1em;
        margin-bottom: 0.1rem;
    }

    .header .subtitle {
        font-size: 0.75rem;
    }

    .score-display {
        gap: 1rem;
        margin-top: 0.25rem;
        font-size: 0.85rem;
    }

    /* Level indicator */
    .level-indicator {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    /* Navigation buttons */
    .home-btn {
        width: 2.2rem;
        height: 2.2rem;
        font-size: 0.9rem;
        top: 0.5rem;
        left: 0.5rem;
    }

    .menu-btn {
        width: 2.2rem;
        height: 2.2rem;
        font-size: 1.2rem;
        top: 0.5rem;
        right: 0.5rem;
    }

    /* Timeline area */
    .timeline-area {
        flex: 0 0 55%;
        padding: 0.5rem;
    }

    .timeline {
        gap: 0.3rem;
        padding: 0.5rem;
    }

    .timeline-slot {
        width: 3.2rem;
        height: 4.5rem;
        min-width: 3.2rem;
        border-width: 2px;
        border-radius: 8px;
    }

    .slot-name {
        font-size: 0.55rem;
        padding: 0.15rem;
    }

    .slot-icon {
        width: 1.5rem;
        height: 1.5rem;
        margin-bottom: 0.15rem;
    }

    .connector {
        width: 0.8rem;
        height: 2px;
    }

    /* Card pool area */
    .card-pool-area {
        flex: 0 0 45%;
        padding: 0.4rem;
    }

    .card-pool-label {
        font-size: 0.7rem;
        margin-bottom: 0.3rem;
    }

    .time-scale {
        height: 1.5rem;
        padding: 0 0.5rem;
        margin-bottom: 0.3rem;
    }

    .time-marker-label {
        font-size: 0.5rem;
    }

    .card-pool {
        gap: 0.3rem;
        padding-bottom: 0.5rem;
    }

    .card {
        width: 2.8rem;
        height: 3.8rem;
        min-width: 2.8rem;
        border-width: 2px;
        border-radius: 6px;
    }

    .card-icon {
        width: 1.3rem;
        height: 1.3rem;
        margin-bottom: 0.1rem;
    }

    .card-name {
        font-size: 0.45rem;
        padding: 0 0.1rem;
    }

    .card-question-mark {
        font-size: 1rem;
    }

    /* Quiz Modal */
    .quiz-modal {
        padding: 1rem;
        border-width: 3px;
        border-radius: 15px;
    }

    .quiz-header h2 {
        font-size: 1.1rem;
        margin-bottom: 0.3rem;
    }

    .quiz-description {
        font-size: 0.95rem;
        line-height: 1.4;
        padding: 0.75rem;
    }

    .quiz-question {
        font-size: 0.9rem;
        margin-bottom: 0.75rem;
    }

    .quiz-options {
        gap: 0.5rem;
    }

    .quiz-option {
        padding: 0.7rem 1rem;
        font-size: 0.95rem;
        border-width: 2px;
        border-radius: 8px;
        min-height: 2.5rem;
    }

    .quiz-feedback {
        font-size: 0.9rem;
        padding: 0.5rem;
        margin-top: 0.75rem;
    }

    /* Menu Modal */
    .menu-modal {
        padding: 1rem;
    }

    .menu-modal h2 {
        font-size: 1.2rem;
    }

    .menu-option {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    /* Share button */
    .share-btn {
        width: 2.2rem;
        height: 2.2rem;
        font-size: 1rem;
        bottom: 0.5rem;
        left: 0.5rem;
    }

    /* Music toggle */
    .music-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.75rem;
        bottom: 0.5rem;
        right: 0.5rem;
    }

    /* Hint display */
    .hint-display {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
    }

    /* Date tooltip */
    .date-tooltip {
        font-size: 0.7rem;
        padding: 0.4rem 0.6rem;
    }

    .date-tooltip .tooltip-note {
        font-size: 0.55rem;
    }
}

/* ==============================================
   RESPONSIVE - Extra Small (380px and below)
   ============================================== */

@media (max-width: 380px) {
    .header h1 {
        font-size: 1.1rem;
    }

    .score-display {
        font-size: 0.75rem;
        gap: 0.5rem;
    }

    .timeline-slot {
        width: 2.8rem;
        height: 4rem;
        min-width: 2.8rem;
    }

    .slot-name {
        font-size: 0.5rem;
    }

    .slot-icon {
        width: 1.3rem;
        height: 1.3rem;
    }

    .card {
        width: 2.5rem;
        height: 3.4rem;
        min-width: 2.5rem;
    }

    .card-icon {
        width: 1.1rem;
        height: 1.1rem;
    }

    .card-name {
        font-size: 0.4rem;
    }

    .quiz-description {
        font-size: 0.85rem;
    }

    .quiz-option {
        font-size: 0.85rem;
        padding: 0.6rem 0.8rem;
    }
}

/* ==============================================
   KEYBOARD NAVIGATION FOCUS STYLES (WCAG)
   ============================================== */

/* Visible focus indicator for keyboard navigation */
.card:focus,
.timeline-slot:focus,
.quiz-option:focus,
.menu-option:focus,
.share-option:focus,
.start-btn:focus,
.win-btn:focus,
.menu-btn:focus,
.home-btn:focus,
.share-btn:focus,
.music-btn:focus {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

/* Remove focus outline on mouse click */
.card:focus:not(:focus-visible),
.timeline-slot:focus:not(:focus-visible),
.quiz-option:focus:not(:focus-visible),
.menu-option:focus:not(:focus-visible),
.share-option:focus:not(:focus-visible),
.start-btn:focus:not(:focus-visible),
.win-btn:focus:not(:focus-visible),
.menu-btn:focus:not(:focus-visible),
.home-btn:focus:not(:focus-visible),
.share-btn:focus:not(:focus-visible),
.music-btn:focus:not(:focus-visible) {
    outline: none;
}

/* Keyboard focus visible (modern browsers) */
.card:focus-visible,
.timeline-slot:focus-visible,
.quiz-option:focus-visible,
.menu-option:focus-visible,
.share-option:focus-visible,
.start-btn:focus-visible,
.win-btn:focus-visible,
.menu-btn:focus-visible,
.home-btn:focus-visible,
.share-btn:focus-visible,
.music-btn:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

/* Keyboard drag mode indicator */
.card.dragging {
    outline: 3px dashed var(--gold);
    outline-offset: 4px;
    animation: keyboard-drag-pulse 1s ease-in-out infinite;
}

@keyframes keyboard-drag-pulse {
    0%, 100% { box-shadow: 0 0 10px var(--gold-glow); }
    50% { box-shadow: 0 0 25px var(--gold-glow); }
}

/* Skip to main content link (screen readers) */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--gold);
    color: var(--ink);
    padding: 8px 16px;
    z-index: 9999;
    text-decoration: none;
    font-weight: bold;
}

.skip-link:focus {
    top: 0;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .star,
    .card,
    .timeline-slot,
    .quiz-option,
    .timer-display.warning,
    .quiz-option.assisted-highlight {
        animation: none !important;
        transition: none !important;
    }
}