/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #13131a;
    --bg-tertiary: #1a1a24;
    --bg-card: rgba(26, 26, 36, 0.6);

    --text-primary: #ffffff;
    --text-secondary: #a0a0b8;
    --text-muted: #6b6b85;

    --accent-primary: #8B5CF6;
    --accent-secondary: #3B82F6;
    --accent-success: #10B981;
    --accent-warning: #F59E0B;

    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
    --gradient-card: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);

    /* 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: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);

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

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 100%);
    pointer-events: none;
    z-index: -1;
    animation: backgroundPulse 15s ease-in-out infinite;
}

@keyframes backgroundPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Outfit', 'Inter', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

/* ===================================
   Container & Layout
   =================================== */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

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

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

/* ===================================
   Header
   =================================== */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo svg {
    filter: drop-shadow(0 4px 12px rgba(139, 92, 246, 0.4));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

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

    50% {
        transform: translateY(-10px);
    }
}

.logo h1 {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
}

/* ===================================
   Form Card
   =================================== */
.form-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    margin: var(--spacing-lg) 0;
}

/* ===================================
   Form Elements
   =================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.form-group label svg {
    color: var(--accent-primary);
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Checkbox */
.checkbox-group {
    margin: var(--spacing-md) 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

/* File Upload */
.file-upload-wrapper {
    position: relative;
}

.form-group input[type="file"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 2px dashed rgba(139, 92, 246, 0.3);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.form-group input[type="file"]:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
}

.form-group input[type="file"]::file-selector-button {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    margin-right: var(--spacing-sm);
    transition: all var(--transition-normal);
}

.form-group input[type="file"]::file-selector-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
}

/* Upload Progress */
.upload-progress {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(139, 92, 246, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    transition: width var(--transition-normal);
    animation: progressPulse 1.5s ease-in-out infinite;
}

@keyframes progressPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

.upload-progress small {
    color: var(--accent-primary);
    font-weight: 500;
}

/* Thumbnail Preview */
.thumbnail-preview {
    margin-top: var(--spacing-sm);
    position: relative;
    width: 200px;
    height: 112px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--accent-primary);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.3);
}

.thumbnail-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.btn-remove {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    width: 28px;
    height: 28px;
    padding: 0;
    background: rgba(239, 68, 68, 0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.btn-remove:hover {
    background: rgba(239, 68, 68, 1);
    transform: scale(1.1);
}

.btn-remove svg {
    color: white;
}

/* ===================================
   Buttons
   =================================== */
.btn-primary,
.btn-secondary,
.btn-outline,
.btn-copy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.1rem;
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(139, 92, 246, 0.4);
}

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

.btn-secondary {
    background: rgba(139, 92, 246, 0.2);
    color: var(--accent-primary);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.btn-secondary:hover {
    background: rgba(139, 92, 246, 0.3);
    border-color: var(--accent-primary);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
}

.btn-copy {
    background: var(--accent-success);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    white-space: nowrap;
}

.btn-copy:hover {
    background: #059669;
    transform: scale(1.05);
}

.btn-copy.copied {
    background: var(--accent-primary);
}

/* ===================================
   Result Section
   =================================== */
.result-section {
    margin-top: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

.result-section.hidden {
    display: none;
}

.result-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: 0 0 40px rgba(16, 185, 129, 0.2);
}

.result-url {
    display: flex;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.result-url input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: 'Courier New', monospace;
}

.result-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.result-actions>* {
    flex: 1;
}

/* ===================================
   Landing Page Styles
   =================================== */
.landing-page {
    background: var(--bg-primary);
}

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.video-section {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    /* 16:9 Aspect Ratio */
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.thumbnail-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 2;
}

.video-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumbnail-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    pointer-events: none;
}

.play-button {
    position: relative;
    z-index: 3;
    background: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.play-button:hover {
    transform: scale(1.1);
    filter: drop-shadow(0 0 30px rgba(139, 92, 246, 0.6));
}

.play-button:active {
    transform: scale(1.05);
}

.play-text {
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.video-player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-player.hidden {
    display: none;
}

.video-player video,
.video-player iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    z-index: 10;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(139, 92, 246, 0.2);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.video-info {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

.video-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.video-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.video-meta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.meta-item svg {
    color: var(--accent-primary);
}

.instructions-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.instructions-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.instructions-card ol {
    margin-left: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 2;
}

.instructions-card strong {
    color: var(--accent-primary);
}

.note {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(139, 92, 246, 0.1);
    border-left: 3px solid var(--accent-primary);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

/* ===================================
   Footer
   =================================== */
.footer,
.landing-footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-lg: 1.5rem;
    }

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

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .logo h1 {
        font-size: 2rem;
    }

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

    .result-actions {
        flex-direction: column;
    }

    .result-url {
        flex-direction: column;
    }

    .video-title {
        font-size: 1.5rem;
    }

    .play-button svg {
        width: 60px;
        height: 60px;
    }

    .play-text {
        font-size: 1rem;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.hidden {
    display: none !important;
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}