/* =============================================================================
   MANDARIN QUEST - Stylesheet
   Ported from Lesson_html Google Apps Script template
   ============================================================================= */

/* === CSS VARIABLES === */
:root {
    --hero-gold: #FFD700;
    --paper: #fafafa;
    --red-ink: #c0392b;
    --glass: rgba(0,0,0,0.85);
}

/* === BASE STYLES === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #111;
    color: #222;
    font-family: 'Noto Sans SC', sans-serif;
    margin: 0;
    height: 100vh;
    overflow: hidden;
}

/* === BACKGROUND SCENERY === */
#scenery {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: -1;
}

/* === ENTRY PAGE === */
#entry-page {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.2), rgba(0,0,0,0.7));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.start-btn {
    padding: 20px 60px;
    font-size: 2rem;
    font-weight: bold;
    color: #000;
    background: var(--hero-gold);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.5);
    transition: transform 0.3s;
}

.start-btn:hover {
    transform: scale(1.1);
}

/* === MAIN GAME CONTAINER === */
#main-game-container {
    display: none;
    opacity: 0;
    transition: opacity 1s;
}

/* === HUD (Header) === */
#hud {
    position: relative;
    z-index: 100;
    background: var(--glass);
    border-bottom: 3px solid var(--hero-gold);
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
}

.hero-name {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--hero-gold);
}

/* === CHARACTER TRACKER === */
.task-box {
    display: flex;
    gap: 8px;
}

.char-slot {
    width: 45px;
    height: 50px;
    border: 2px solid #555;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.6);
    color: #777;
    transition: 0.3s;
}

.char-main {
    font-size: 1.2rem;
}

.char-count {
    font-size: 0.6rem;
    color: #999;
}

.char-slot.done {
    background: var(--hero-gold);
    color: #000;
    border-color: white;
    box-shadow: 0 0 15px var(--hero-gold);
    transform: scale(1.05);
}

.char-slot.done .char-count {
    color: #333;
    font-weight: bold;
}

/* === BOOK VIEWPORT === */
#book-viewport {
    height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
}

#page-wrapper {
    position: relative;
    width: 95vw;
    max-width: 900px;
    height: 100%;
}

.story-page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--paper);
    border-radius: 8px 16px 16px 8px;
    padding: 40px;
    box-sizing: border-box;
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    font-size: 1.8rem;
    line-height: 2.8;
    box-shadow: 0 10px 40px rgba(0,0,0,0.7);
    border-left: 12px solid #e0e0e0;
    overflow-y: auto;
}

.story-page.visible {
    display: flex !important;
    animation: fadeIn 0.4s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* === INTERACTIVE TEXT === */
ruby {
    margin: 0 4px;
}

rt {
    color: #888;
    font-size: 0.5em;
}

.vocab-word {
    border-bottom: 3px solid #00BCD4;
    cursor: pointer;
    color: #00BCD4;
    font-weight: bold;
    background: rgba(0, 188, 212, 0.08);
    padding: 0 2px;
    border-radius: 4px;
}

/* Hint reveal highlight (distinct from normal found) */
.hidden-char.hint-reveal {
    color: #6C63FF !important; /* playful indigo */
    font-weight: 700 !important;
    text-shadow: 0 0 8px rgba(108, 99, 255, 0.5) !important;
    background: rgba(108, 99, 255, 0.08);
    border-radius: 4px;
    padding: 0 3px;
}

.hidden-char {
    cursor: pointer;
    transition: all 0.3s ease;
}

/* Found character highlighting - kid-friendly bright coral */
ruby.hidden-char.found,
.hidden-char.found {
    color: #FF6B6B !important;
    font-weight: 700 !important;
    text-shadow: 0 0 8px rgba(255, 107, 107, 0.5) !important;
    filter: none !important;
}

/* === SPARKLE ANIMATION === */
.sparkle {
    position: fixed;
    width: 6px;
    height: 6px;
    background: var(--hero-gold);
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    box-shadow: 0 0 10px #fff;
}

@keyframes sparkle-out {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    100% { transform: translate(var(--tx), var(--ty)) scale(0); opacity: 0; }
}

/* === VOCABULARY POPUP (SENSEI GUIDE) === */
#p-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 400;
    display: none;
}

#popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    width: 85%;
    max-width: 450px;
    padding: 25px;
    border-radius: 15px;
    border: 4px solid var(--hero-gold);
    text-align: center;
    display: none;
    z-index: 500;
}

#popup button {
    background: var(--hero-gold);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: 0.3s;
}

#popup button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
}

/* === VICTORY FIREWORKS === */
#firework-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8) url('https://media.giphy.com/media/26tOZ42Mg6pbTUPHW/giphy.gif') center;
    background-size: cover;
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.victory-text {
    color: var(--hero-gold);
    font-size: 5rem;
    font-weight: bold;
    text-shadow: 0 0 20px #fff, 0 0 30px var(--hero-gold);
    animation: rainbow 2s infinite, pulse 1s infinite alternate;
}

@keyframes rainbow {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

@keyframes pulse {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

/* === CONTROLS === */
#controls {
    position: fixed;
    bottom: 30px;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 40px;
}

.nav-btn {
    background: var(--hero-gold);
    border: none;
    padding: 12px 40px;
    border-radius: 30px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.nav-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.nav-btn:disabled {
    background: #555;
    color: #888;
    cursor: not-allowed;
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
    .story-page {
        font-size: 1.4rem;
        line-height: 2.4;
        padding: 25px;
    }
    
    .victory-text {
        font-size: 3rem;
    }
    
    .hero-name {
        font-size: 1rem;
    }
    
    .char-slot {
        width: 40px;
        height: 45px;
    }
}
/* =============================================================================
   BOOKSHELF VIEW - Main Entry Point
   ============================================================================= */

#bookshelf {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: url('https://www.transparenttextures.com/patterns/clouds.png'), linear-gradient(180deg, #87CEEB 0%, #E0F7FA 100%);
    color: white;
    overflow: hidden;
}

.bookshelf-header {
    text-align: center;
    padding: 30px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 3px solid #FFD700;
}

.bookshelf-header h1 {
    font-size: 3rem;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.bookshelf-header p {
    font-size: 1.5rem;
    margin: 10px 0 0 0;
    opacity: 0.9;
}

.bookshelf-grid {
    flex: 1;
    overflow-y: auto;
    padding: 60px 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 40px;
    align-content: start;
    justify-items: center;
}

.book-card {
    position: relative;
    width: 240px;
    height: 320px;
    border-radius: 25px;
    overflow: hidden;
    cursor: pointer;
    border: 8px solid white;
    transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
    background: #ffffff;
}

.book-card.unlocked {
    cursor: pointer;
}

.book-card.unlocked:hover {
    transform: scale(1.05) rotate(1deg);
    box-shadow: 0 20px 40px rgba(0,0,0,0.25);
    border-color: var(--hero-gold);
}

.book-card.locked {
    filter: saturate(0.2) brightness(0.85);
    cursor: not-allowed;
}

.book-cover {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.book-cover.grayscale {
    filter: grayscale(100%) brightness(0.8);
}

.lock-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3.5rem;
    filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.5));
}

.star-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 2.5rem;
    color: var(--hero-gold);
    filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.5));
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.book-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px;
    background: white;
    border-top: 4px solid #FFD70022;
}

.book-title {
    font-size: 1rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-hero {
    font-size: 0.9rem;
    color: #666;
}

.bookshelf-footer {
    padding: 20px;
    background: rgba(0, 0, 0, 0.2);
    text-align: center;
    border-top: 2px solid #FFD700;
}

.reset-btn {
    padding: 10px 20px;
    font-size: 0.9rem;
    background: #FF6B6B;
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.reset-btn:hover {
    background: #FF5252;
    box-shadow: 0 4px 10px rgba(255, 107, 107, 0.4);
}

/* === POPUP STYLES === */
.popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.popup-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    max-width: 400px;
    text-align: center;
}

.close-btn {
    float: right;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: #000;
}

/* === PAGE CONTAINER === */
.page-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

/* === VOCAB AND SEEK STYLES === */
.vocab-word {
    color: #E8860F;
    text-decoration: none !important;
    border-bottom: none;
    display: inline-block;
    padding-bottom: 2px;
    background-image: linear-gradient(#E8860F, #E8860F);
    background-size: 100% 2px;
    background-repeat: no-repeat;
    background-position: 0 100%;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s ease;
}

.vocab-word:hover {
    background: #FFF59D;
    padding: 2px 5px;
    border-radius: 3px;
}
/* Ensure proper ruby annotation display */
ruby {
    display: inline-ruby;
    ruby-position: over;
    -webkit-ruby-position: before;
    ruby-align: center;
    margin: 0 4px;
}

ruby > rt {
    display: ruby-text;
    font-size: 0.5em;
    color: #888;
    line-height: 1;
}

/* iOS WebKit (Chrome/Safari) ruby positioning fix */
@supports (-webkit-touch-callout: none) {
    ruby {
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-end;
        line-height: 1.1;
    }

    ruby > rt {
        display: block;
        order: -1;
        margin-bottom: 0.1em;
    }
}

/* For browsers that don't support ruby well */
@supports not (display: ruby) {
    ruby {
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-end;
        text-align: center;
        vertical-align: bottom;
    }
    
    ruby > rt {
        display: block;
        order: -1;
        font-size: 0.5em;
        line-height: 1.2;
    }
}