/* ============================================
   DICTIONARY APP - GLASSMORPHIC 3D DESIGN
   ============================================ */

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

:root {
    /* Color Palette - Vibrant & Modern */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --error-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #4facfe;
    --success-color: #43e97b;
    --error-color: #fa709a;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);

    /* Dark Background */
    --bg-dark: #0f0c29;
    --bg-gradient: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

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

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index layers */
    --z-background: 0;
    --z-content: 10;
    --z-header: 100;
    --z-modal: 1000;
}

/* Light Theme Variables */
body.light-theme {
    --bg-dark: #f0f4f8;
    --bg-gradient: linear-gradient(135deg, #e0e7ff 0%, #f0f4f8 50%, #e0e7ff 100%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
    --primary-color: #667eea;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
}

body.light-theme {
    color: var(--text-primary);
}

body.light-theme .app-title {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.light-theme .app-subtitle,
body.light-theme .search-input,
body.light-theme .word-title,
body.light-theme .definition-text {
    color: var(--text-primary);
}

body.light-theme .search-input::placeholder {
    color: rgba(0, 0, 0, 0.4);
}

body.light-theme .phonetic-text,
body.light-theme .example-text {
    color: var(--text-secondary);
}

/* ============================================
   GLOBAL STYLES
   ============================================ */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: #ffffff;
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   BACKGROUND ANIMATION
   ============================================ */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-background);
    overflow: hidden;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #f093fb, #f5576c);
    bottom: -150px;
    right: -150px;
    animation-delay: 5s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(50px, -50px) scale(1.1);
    }

    66% {
        transform: translate(-50px, 50px) scale(0.9);
    }
}

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: var(--z-modal);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 12px 48px 0 rgba(102, 126, 234, 0.4);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    stroke: #ffffff;
    transition: all var(--transition-base);
}

body.light-theme .theme-toggle svg {
    stroke: var(--primary-color);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

body.light-theme .sun-icon {
    display: block;
}

body.light-theme .moon-icon {
    display: none;
}

/* Home Button */
.home-button {
    position: fixed;
    top: 2rem;
    right: 6rem;
    z-index: var(--z-modal);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    text-decoration: none;
}

.home-button:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: 0 12px 48px 0 rgba(102, 126, 234, 0.4);
}

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

.home-button svg {
    width: 24px;
    height: 24px;
    stroke: #ffffff;
    transition: all var(--transition-base);
}

body.light-theme .home-button svg {
    stroke: var(--primary-color);
}


/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: var(--z-content);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   GLASSMORPHIC CARD
   ============================================ */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 48px 0 rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.3);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.8s ease;
}

.header-content {
    display: inline-block;
    padding: var(--spacing-md);
}

.app-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff, #a8b8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.icon {
    font-size: clamp(3rem, 6vw, 5rem);
    animation: bounce 2s infinite;
    filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.6));
    display: inline-block;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0) scale(1);
    }

    50% {
        transform: translateY(-15px) scale(1.1);
    }
}

/* CSS Book Icon */
.book-icon {
    width: 60px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 5px;
    position: relative;
    display: inline-block !important;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.5);
}

.book-icon::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 2px;
    height: 100%;
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(-50%);
}

.book-icon::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 10%;
    width: 70%;
    height: 2px;
    background: rgba(255, 255, 255, 0.4);
    transform: translateX(-50%);
    box-shadow:
        0 10px 0 rgba(255, 255, 255, 0.3),
        0 20px 0 rgba(255, 255, 255, 0.3);
}


.app-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.8);
    font-weight: 300;
    letter-spacing: 0.5px;
}

/* ============================================
   SEARCH SECTION
   ============================================ */
.search-section {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease;
}

.search-container {
    padding: var(--spacing-lg);
}

.search-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.search-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
    font-family: var(--font-primary);
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: #ffffff;
    outline: none;
    transition: all var(--transition-base);
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.search-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
    transform: scale(1.01);
}

.search-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: #ffffff;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
}

.search-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.search-btn:active {
    transform: scale(0.98);
}

.search-btn:focus {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

.search-hint {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
}

/* ============================================
   LOADING INDICATOR
   ============================================ */
.loading-container {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    animation: fadeIn 0.3s ease;
}

.loading-container[aria-hidden="false"] {
    display: flex;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

/* ============================================
   ERROR CONTAINER
   ============================================ */
.error-container {
    display: none;
    padding: var(--spacing-lg) 0;
    animation: fadeIn 0.3s ease;
}

.error-container[aria-hidden="false"] {
    display: block;
}

.error-card {
    padding: var(--spacing-xl);
    text-align: center;
    background: rgba(250, 112, 154, 0.1);
    border-color: rgba(250, 112, 154, 0.3);
}

.error-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: shake 0.5s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-10px);
    }

    75% {
        transform: translateX(10px);
    }
}

.error-title {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: #ffffff;
}

.error-message {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.btn-primary {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.btn-primary:focus {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

/* ============================================
   RESULTS CONTAINER
   ============================================ */
.results-container {
    flex: 1;
    animation: fadeIn 0.5s ease;
}

/* Word Header */
.word-header {
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    position: relative;
}

.word-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

.word-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: #ffffff;
    word-break: break-word;
}

.phonetic-text {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

/* Audio Controls */
.audio-controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.audio-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.audio-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 172, 254, 0.4);
}

.audio-btn:active {
    transform: translateY(0);
}

.audio-btn:focus {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

/* Meanings Section */
.meanings-section {
    display: grid;
    gap: var(--spacing-lg);
}

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

.part-of-speech {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.definitions-list {
    list-style: none;
    display: grid;
    gap: var(--spacing-md);
}

.definition-item {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.definition-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
}

.definition-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.definition-number {
    font-weight: 700;
    color: var(--primary-color);
    margin-right: var(--spacing-xs);
}

.example-text {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
    padding-left: var(--spacing-lg);
    border-left: 2px solid rgba(255, 255, 255, 0.2);
    margin-top: var(--spacing-sm);
}

.example-label {
    font-weight: 600;
    color: var(--accent-color);
}

/* Synonyms Section */
.synonyms-section {
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.synonyms-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: #ffffff;
}

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

.synonym-tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--secondary-gradient);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-base);
    cursor: pointer;
}

.synonym-tag:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(118, 75, 162, 0.4);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    margin-top: auto;
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-text {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--spacing-xs);
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.footer-copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

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

    .app-title {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .search-input-wrapper {
        flex-direction: column;
    }

    .search-btn {
        width: 100%;
        padding: var(--spacing-md);
    }

    .word-header {
        padding: var(--spacing-lg);
    }

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

    .orb {
        filter: blur(60px);
    }
}

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

    .glass-card {
        border-radius: var(--radius-md);
    }

    .search-container {
        padding: var(--spacing-md);
    }
}

/* ============================================
   ACCESSIBILITY - FOCUS STATES
   ============================================ */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
}

/* Reduce Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .glass-card {
        border: 2px solid #ffffff;
    }

    .search-input {
        border: 2px solid #ffffff;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {

    .background-animation,
    .search-section,
    .audio-controls,
    .footer {
        display: none;
    }

    body {
        background: #ffffff;
        color: #000000;
    }

    .glass-card {
        background: #ffffff;
        border: 1px solid #000000;
        box-shadow: none;
    }
}