/* TaraOno Alphabet - Interactive Showcase */

:root {
    /* Category Colors - Using only our navy and blue palette */
    --color-vowel: #364568;      /* Primary Navy */
    --color-stop: #5F7FA3;       /* Secondary Blue */
    --color-fricative: #5F7FA3;  /* Secondary Blue */
    --color-nasal: #364568;      /* Primary Navy */
    --color-approximant: #5F7FA3; /* Secondary Blue */
    --color-affricate: #364568;  /* Primary Navy */
    --color-advanced: #5F7FA3;   /* Secondary Blue */

    /* Gradients - Navy and Blue only */
    --gradient-vowel: linear-gradient(135deg, #364568 0%, #5F7FA3 100%);
    --gradient-stop: linear-gradient(135deg, #5F7FA3 0%, #7A9BBB 100%);
    --gradient-fricative: linear-gradient(135deg, #5F7FA3 0%, #7A9BBB 100%);
    --gradient-nasal: linear-gradient(135deg, #364568 0%, #5F7FA3 100%);
    --gradient-approximant: linear-gradient(135deg, #5F7FA3 0%, #7A9BBB 100%);
    --gradient-affricate: linear-gradient(135deg, #364568 0%, #5F7FA3 100%);
    --gradient-advanced: linear-gradient(135deg, #5F7FA3 0%, #7A9BBB 100%);
}

/* ===== HERO SECTION ===== */
.alphabet-hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(180deg, #364568 0%, #5F7FA3 50%, #F4F6FA 100%);
    text-align: center;
}

.alphabet-hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    color: #FFFFFF;
    letter-spacing: -0.04em;
}

.alphabet-hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.95);
}

.alphabet-hero-description {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== FILTER CONTROLS ===== */
.alphabet-controls {
    padding: 3rem 0;
    background: #F4F6FA;
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid rgba(139, 92, 246, 0.2);
    background: white;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    color: #5B6478;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn .count {
    display: inline-block;
    background: rgba(139, 92, 246, 0.1);
    color: #5F7FA3;
    padding: 0.25rem 0.625rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 700;
}

.filter-btn:hover {
    transform: translateY(-2px);
    border-color: #5F7FA3;
    background: rgba(139, 92, 246, 0.05);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}

.filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.3);
}

.filter-btn.active .count {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Search Container */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.alphabet-search {
    width: 100%;
    padding: 1rem 1.5rem 1rem 3.5rem;
    border: 2px solid rgba(139, 92, 246, 0.2);
    border-radius: 50px;
    font-size: 1.125rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.alphabet-search:focus {
    outline: none;
    border-color: #5F7FA3;
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.search-icon {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    opacity: 0.5;
}

/* ===== ALPHABET GRID ===== */
.alphabet-grid-section {
    padding: 4rem 0;
    background: white;
}

.alphabet-category {
    margin-bottom: 5rem;
}

.category-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: #1F2430;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    display: block;
}

.category-subtitle {
    display: block;
    font-size: 1.125rem;
    font-weight: 500;
    color: #5B6478;
    margin-top: 0.5rem;
    letter-spacing: normal;
}

/* Letters Grid */
.letters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

/* ===== LETTER CARDS ===== */
.letter-card {
    position: relative;
    background: white;
    border: 2px solid transparent;
    border-radius: 20px;
    padding: 2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

/* Gradient border effect */
.letter-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(99, 102, 241, 0.3));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* Category-specific gradients */
.letter-card.vowel::before {
    background: var(--gradient-vowel);
}

.letter-card.stop::before {
    background: var(--gradient-stop);
}

.letter-card.fricative::before {
    background: var(--gradient-fricative);
}

.letter-card.nasal::before {
    background: var(--gradient-nasal);
}

.letter-card.approximant::before {
    background: var(--gradient-approximant);
}

.letter-card.affricate::before {
    background: var(--gradient-affricate);
}

.letter-card.advanced::before {
    background: var(--gradient-advanced);
}

/* Hover State */
.letter-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}

.letter-card:hover::before {
    opacity: 1;
}

/* Letter Symbol */
.letter-symbol {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #1F2430;
    transition: all 0.3s ease;
}

.letter-card:hover .letter-symbol {
    transform: scale(1.1);
}

/* Category-specific symbol colors on hover */
.letter-card.vowel:hover .letter-symbol {
    background: var(--gradient-vowel);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-card.stop:hover .letter-symbol {
    background: var(--gradient-stop);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-card.fricative:hover .letter-symbol {
    background: var(--gradient-fricative);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-card.nasal:hover .letter-symbol {
    background: var(--gradient-nasal);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-card.approximant:hover .letter-symbol {
    background: var(--gradient-approximant);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-card.affricate:hover .letter-symbol {
    background: var(--gradient-affricate);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-card.advanced:hover .letter-symbol {
    background: var(--gradient-advanced);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-name {
    font-size: 1rem;
    font-weight: 600;
    color: #5B6478;
    margin-bottom: 0.5rem;
}

.letter-example {
    font-size: 0.875rem;
    color: #5B6478;
    margin-bottom: 0.75rem;
    font-style: italic;
}

.letter-example strong {
    color: #5F7FA3;
    font-weight: 700;
}

.letter-category-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    background: rgba(139, 92, 246, 0.1);
    color: #5F7FA3;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== PRONUNCIATION MODAL ===== */
.pronunciation-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

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

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.pronunciation-modal.active .modal-overlay {
    opacity: 1;
}

.modal-content {
    position: relative;
    background: white;
    border-radius: 24px;
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.pronunciation-modal.active .modal-content {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: rotate(90deg);
}

.modal-header {
    text-align: center;
    padding: 3rem 2rem 2rem;
    background: linear-gradient(180deg, #F4F6FA 0%, white 100%);
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
}

.modal-letter {
    font-size: 6rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.modal-ipa {
    font-size: 2rem;
    color: #5B6478;
    font-family: monospace;
}

.modal-body {
    padding: 2rem;
}

.pronunciation-section {
    margin-bottom: 2rem;
}

.pronunciation-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1F2430;
    margin-bottom: 1rem;
}

.pronunciation-description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #5B6478;
}

.example-words {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.example-word {
    padding: 0.75rem 1.25rem;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 12px;
    font-size: 1.125rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.example-word::after {
    content: '🔊';
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    font-size: 0.875rem;
}

.example-word:hover {
    background: rgba(139, 92, 246, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}

.example-word:hover::after {
    opacity: 1;
}

.example-word:active {
    transform: translateY(0);
}

.example-word strong {
    color: #5F7FA3;
    font-weight: 700;
}

.play-audio-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.play-audio-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

.play-icon {
    font-size: 1.25rem;
}

.waveform {
    margin-top: 1.5rem;
    height: 80px;
    background: rgba(139, 92, 246, 0.05);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.related-letters {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.related-letter {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.related-letter:hover {
    background: var(--gradient-primary);
    color: white;
    transform: scale(1.1);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .alphabet-hero {
        padding: 6rem 0 3rem;
    }

    .filter-buttons {
        gap: 0.75rem;
    }

    .filter-btn {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }

    .letters-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 1rem;
    }

    .letter-card {
        padding: 1.5rem 1rem;
    }

    .letter-symbol {
        font-size: 3rem;
    }

    .modal-content {
        margin: 1rem;
    }

    .modal-letter {
        font-size: 4rem;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.letter-card.playing {
    animation: pulse 0.6s ease-in-out;
}

/* Fade in animation (will be triggered by GSAP) */
.letter-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Filtered out state */
.letter-card.filtered-out {
    opacity: 0.2;
    transform: scale(0.95);
    pointer-events: none;
}

.letter-card.filtered-in {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}