/* ============================================
   Hunttera - Premium Dark Theme with Glassmorphism
   ============================================ */

/* CSS Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    --bg-dark: #0a0e27;
    --bg-darker: #060815;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --text-primary: #ffffff;
    --text-secondary: #b4b4c8;
    --text-muted: #6e6e8f;
    
    --error-bg: rgba(245, 87, 108, 0.1);
    --error-border: rgba(245, 87, 108, 0.3);
    --error-text: #ff6b88;
    
    /* Spacing & Sizing */
    --border-radius: 16px;
    --border-radius-sm: 12px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    
    /* Effects */
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.3);
    --glow: 0 0 20px rgba(102, 126, 234, 0.5);
}

/* Body & Background */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Animated Background */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--bg-dark);
    overflow: hidden;
}

.background-animation::before,
.background-animation::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: float 20s infinite ease-in-out;
}

.background-animation::before {
    background: linear-gradient(135deg, #667eea, #764ba2);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.background-animation::after {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    bottom: -200px;
    right: -200px;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(50px, 50px) scale(1.1);
    }
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    position: relative;
    z-index: 1;
}

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

.logo {
    font-size: 3rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -1px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* Glass Card Effect */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

/* Input Form */
.input-form {
    width: 100%;
}

.input-group {
    margin-bottom: var(--spacing-md);
}

.submit-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.input-field {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.input-field:focus {
    outline: none;
    border-color: #667eea;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-field::placeholder {
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1.1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
    min-height: 56px;
}

.btn-icon {
    width: 24px;
    height: 24px;
}

.btn-watch {
    background: var(--success-gradient);
    color: white;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-watch::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-watch:hover::before {
    left: 100%;
}

.btn-watch:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(79, 172, 254, 0.6);
}

.btn-watch:active {
    transform: translateY(-1px);
}

.btn-download-main {
    background: var(--secondary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-download-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn-download-main:hover::before {
    left: 100%;
}

.btn-download-main:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(245, 87, 108, 0.6);
}

.btn-download-main:active {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--glow);
}

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

.btn-play {
    background: var(--success-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-play:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(79, 172, 254, 0.5);
}

.btn-download {
    background: var(--secondary-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(245, 87, 108, 0.5);
}

/* Error Card */
.error-card {
    background: var(--error-bg);
    border-color: var(--error-border);
    text-align: center;
}

.error-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.error-title {
    color: var(--error-text);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.error-message {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Result Card */
.result-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-color: rgba(102, 126, 234, 0.3);
}

/* Thumbnail */
.thumbnail-container {
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background: rgba(0, 0, 0, 0.3);
}

.thumbnail {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    max-height: 400px;
}

/* File Info */
.file-info {
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    gap: var(--spacing-md);
}

.info-row:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.info-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.info-value {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-align: right;
    word-break: break-word;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.action-buttons .btn {
    flex: 1;
    min-width: 140px;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 24px;
        --spacing-xl: 32px;
    }
    
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .logo {
        font-size: 2.5rem;
    }
    
    .tagline {
        font-size: 0.875rem;
    }
    
    .glass-card {
        padding: var(--spacing-md);
    }
    
    .card-title {
        font-size: 1.25rem;
    }
    
    .submit-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .input-field {
        font-size: 1rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .btn {
        width: 100%;
        font-size: 1rem;
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 50px;
    }
    
    .btn-icon {
        width: 20px;
        height: 20px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        min-width: 100%;
    }
    
    .info-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .info-value {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 2rem;
    }
    
    .header {
        margin-bottom: var(--spacing-lg);
        padding-top: var(--spacing-md);
    }
    
    .glass-card {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .thumbnail {
        max-height: 250px;
    }
    
    .btn {
        font-size: 0.95rem;
        min-height: 48px;
    }
}

/* Loading Animation */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Style */
::selection {
    background: rgba(102, 126, 234, 0.3);
    color: var(--text-primary);
}

::-moz-selection {
    background: rgba(102, 126, 234, 0.3);
    color: var(--text-primary);
}