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

:root {
    /* Sophisticated Color Palette */
    --color-primary: #2d3142;
    --color-secondary: #4f5d75;
    --color-accent: #bfc0c0;
    --color-light: #f8f9fa;
    --color-white: #ffffff;
    --color-overlay: rgba(45, 49, 66, 0.7);

    /* Typography */
    --font-serif: 'Cormorant Garamond', serif;
    --font-sans: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-primary);
    background-color: var(--color-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-image-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: kenBurns 20s ease-in-out infinite alternate;
}

@keyframes kenBurns {
    0% {
        transform: scale(1);
    }
    100% {
        transform: scale(1.1);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(45, 49, 66, 0.85) 0%,
        rgba(79, 93, 117, 0.75) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    padding: var(--spacing-md);
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 300;
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 300;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-cta {
    margin-top: var(--spacing-lg);
}

.cta-button {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 1rem 2.5rem;
    background: var(--color-white);
    color: var(--color-primary);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-medium);
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: var(--color-light);
}

.cta-button svg {
    transition: transform var(--transition-medium);
}

.cta-button:hover svg {
    transform: translateY(3px);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-white);
    border-radius: 20px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-white);
    border-radius: 50%;
    animation: scrollAnimation 2s infinite;
}

@keyframes scrollAnimation {
    0%, 100% {
        top: 10px;
        opacity: 1;
    }
    50% {
        top: 30px;
        opacity: 0.3;
    }
}

/* ==========================================
   CONTAINER
   ========================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   CONTROLS SECTION
   ========================================== */
.controls {
    background: var(--color-white);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow var(--transition-medium);
}

.controls.scrolled {
    box-shadow: var(--shadow-md);
}

.search-bar {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-secondary);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    font-family: var(--font-sans);
    font-size: 1.1rem;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: var(--color-light);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-secondary);
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-secondary);
    letter-spacing: 0.03em;
}

.filter-select {
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    background: var(--color-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-select:hover {
    border-color: var(--color-secondary);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-white);
}

.reset-button {
    padding: 0.75rem 1.5rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.reset-button:hover {
    background: var(--color-secondary);
    transform: translateY(-1px);
}

/* ==========================================
   MAIN CONTENT
   ========================================== */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   SYNONYM CARD
   ========================================== */
.synonym-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-medium);
    cursor: pointer;
    position: relative;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.synonym-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.card-image-container {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.synonym-card:hover .card-image {
    transform: scale(1.05);
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        rgba(45, 49, 66, 0) 0%,
        rgba(45, 49, 66, 0.7) 100%
    );
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-md);
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.synonym-card:hover .card-overlay {
    opacity: 1;
}

.card-overlay-content {
    width: 100%;
}

.overlay-definition {
    color: var(--color-white);
    font-size: 0.95rem;
    line-height: 1.5;
}

.image-credit {
    position: absolute;
    bottom: 0.5rem;
    left: 0.75rem;
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.8);
    background: rgba(0, 0, 0, 0.3);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    backdrop-filter: blur(4px);
}

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

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.card-verb {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-primary);
    line-height: 1.2;
}

.card-pronunciation {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-secondary);
    font-style: italic;
    margin-top: 0.25rem;
}

/* Audio Speaker Button */
.audio-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #4a5568;
    transition: all 0.2s ease;
    border-radius: 50%;
}

.audio-button:hover {
    color: #2d3748;
    background: rgba(0, 0, 0, 0.05);
    transform: scale(1.1);
}

.audio-button:active {
    transform: scale(0.95);
}

.audio-button.playing {
    color: #3182ce;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.audio-button svg {
    width: 18px;
    height: 18px;
}

/* Example Audio Button */
.example-audio-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    margin-left: 0.5rem;
    display: inline-flex;
    align-items: center;
    color: #718096;
    transition: all 0.2s ease;
    border-radius: 4px;
    vertical-align: middle;
}

.example-audio-button:hover {
    color: #2d3748;
    background: rgba(0, 0, 0, 0.05);
}

.example-audio-button.playing {
    color: #3182ce;
}

.example-audio-button svg {
    width: 16px;
    height: 16px;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.tag {
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.tag-formality {
    background: rgba(79, 93, 117, 0.1);
    color: var(--color-secondary);
}

.tag-context {
    background: rgba(45, 49, 66, 0.05);
    color: var(--color-primary);
    border: 1px solid var(--color-accent);
}

.card-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-accent);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-expand-text {
    font-size: 0.9rem;
    color: var(--color-secondary);
    font-weight: 500;
}

.card-expand-icon {
    transition: transform var(--transition-fast);
}

.synonym-card:hover .card-expand-icon {
    transform: translateX(4px);
}

/* ==========================================
   NO RESULTS
   ========================================== */
.no-results {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--color-secondary);
}

.no-results svg {
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.no-results h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.no-results p {
    font-size: 1.1rem;
}

/* ==========================================
   MODAL
   ========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(45, 49, 66, 0.9);
    backdrop-filter: blur(8px);
    animation: fadeIn var(--transition-medium);
}

.modal-content {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    max-width: 1000px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-medium);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 10;
    background: var(--color-white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-light);
    transform: rotate(90deg);
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.modal-image-container {
    position: relative;
    height: 100%;
    min-height: 500px;
}

.modal-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.modal-image-credit {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(
        180deg,
        rgba(45, 49, 66, 0) 0%,
        rgba(45, 49, 66, 0.8) 100%
    );
    padding: var(--spacing-md);
    color: var(--color-white);
    font-size: 0.85rem;
}

.modal-image-credit a {
    color: var(--color-white);
    text-decoration: underline;
}

.modal-details {
    padding: var(--spacing-lg);
    padding-left: 0;
}

.modal-header {
    margin-bottom: var(--spacing-md);
}

.modal-verb {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 500;
    color: var(--color-primary);
    line-height: 1.1;
    margin-bottom: var(--spacing-xs);
}

.modal-pronunciation {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    color: var(--color-secondary);
    font-style: italic;
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.modal-section {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.modal-definition {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-secondary);
}

.examples-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.example-item {
    padding-left: var(--spacing-md);
    position: relative;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-primary);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.example-text {
    flex: 1;
    min-width: 0;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.example-item::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

.highlighted-verb {
    color: var(--color-primary);
    font-weight: 600;
    white-space: nowrap !important;
    word-break: keep-all !important;
    overflow-wrap: normal !important;
    hyphens: none !important;
}

.example-item .highlighted-verb,
.examples-list .highlighted-verb {
    white-space: nowrap !important;
    word-break: keep-all !important;
    hyphens: none !important;
}

.modal-cultural {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-secondary);
    font-style: italic;
    background: rgba(191, 192, 192, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.regions-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.region-badge {
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-text {
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

.footer-text a {
    color: var(--color-white);
    text-decoration: underline;
    transition: opacity var(--transition-fast);
}

.footer-text a:hover {
    opacity: 0.7;
}

.footer-copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 968px) {
    .modal-body {
        grid-template-columns: 1fr;
    }

    .modal-image-container {
        min-height: 300px;
    }

    .modal-image {
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .modal-details {
        padding: var(--spacing-md);
    }

    .modal-verb {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }

    .filters {
        grid-template-columns: 1fr;
    }

    .reset-button {
        width: 100%;
        justify-content: center;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    .card-verb {
        font-size: 1.75rem;
    }

    .modal-verb {
        font-size: 2rem;
    }
}

/* ==========================================
   ANIMATIONS & INTERACTIONS
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Loading state */
.synonym-card.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Image loading placeholder */
.card-image,
.modal-image {
    background: linear-gradient(
        90deg,
        var(--color-accent) 0%,
        var(--color-light) 50%,
        var(--color-accent) 100%
    );
    background-size: 200% 100%;
}

.card-image.loading,
.modal-image.loading {
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}


/* ==========================================
   STORY BUTTON ON CARDS
   ========================================== */

.story-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(45, 49, 66, 0.2);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-primary);
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.story-button:hover {
    background: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.story-button svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.story-label {
    font-family: var(--font-sans);
    font-weight: 600;
}