:root {
    --bg-dark: #0f172a;
    --bg-panel: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #6366f1;
    --accent-secondary: #ec4899;
    --accent-glow: rgba(99, 102, 241, 0.5);
    
    --yt-color: #ef4444;
    --fb-color: #3b82f6;
    --audio-color: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Animations */
.background-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s infinite alternate;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-primary);
    top: -100px;
    left: -100px;
}

.orb-2 {
    width: 350px;
    height: 350px;
    background: var(--accent-secondary);
    bottom: -50px;
    right: -50px;
    animation-delay: -5s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(100px, 50px) scale(1.1); }
    66% { transform: translate(-50px, 150px) scale(0.9); }
    100% { transform: translate(0, 0) scale(1); }
}

/* Layout */
.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-primary);
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 600;
    transition: color 0.3s;
}

nav a:hover, nav a.active {
    color: var(--text-primary);
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.hero {
    text-align: center;
    margin-top: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Glassmorphism Panel */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Input Area */
.downloader-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.input-group {
    display: flex;
    background: rgba(15, 23, 42, 0.8);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    padding: 0.5rem;
    align-items: center;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.input-group:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.icon-link {
    color: var(--text-secondary);
    padding: 0 1rem;
    font-size: 1.2rem;
}

input[type="url"] {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    outline: none;
}

input[type="url"]::placeholder {
    color: var(--text-secondary);
}

button#fetch-btn {
    background: linear-gradient(135deg, var(--accent-primary), #818cf8);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

button#fetch-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--accent-glow);
}

/* States */
.hidden {
    display: none !important;
}

#loading-state, #error-state {
    text-align: center;
    margin-top: 2rem;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255,255,255,0.1);
    border-left-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

#error-state {
    color: var(--yt-color);
}

#error-state i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Results Area */
#result-state {
    margin-top: 2rem;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.media-info {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    background: rgba(0,0,0,0.2);
    padding: 1rem;
    border-radius: 16px;
    align-items: center;
}

.media-info img {
    width: 180px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
}

.media-details h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.media-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.download-options h4 {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.dl-btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
    text-decoration: none;
}

.dl-btn:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.dl-btn.audio {
    border-color: rgba(16, 185, 129, 0.3);
}

.dl-btn.audio:hover {
    border-color: var(--audio-color);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.2);
}

.dl-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.dl-quality {
    font-weight: 600;
    font-size: 1.1rem;
}

.dl-ext {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Features section */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.yt-color { color: var(--yt-color); }
.fb-color { color: var(--fb-color); }
.audio-color { color: var(--audio-color); }

.feature h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.feature p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-top: 2rem;
}

@media (max-width: 768px) {
    .features {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .media-info {
        flex-direction: column;
        align-items: stretch;
    }
    
    .media-info img {
        width: 100%;
        height: 180px;
    }
    
    /* Make input group stack on mobile */
    .input-group {
        flex-direction: column;
        border-radius: 20px;
        padding: 1rem;
        gap: 1rem;
    }
    
    .input-group .icon-link {
        display: none;
    }
    
    .input-group input[type="url"] {
        width: 100%;
        text-align: center;
        padding: 0.8rem;
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 12px;
        background: rgba(0, 0, 0, 0.2);
    }
    
    button#fetch-btn {
        width: 100%;
        justify-content: center;
        border-radius: 12px;
    }
}