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

:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #131316;
    --bg-card: #1a1a1f;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent-mp3: #8b5cf6;
    --accent-mp3-hover: #7c3aed;
    --accent-mp4: #06b6d4;
    --accent-mp4-hover: #0891b2;
    --border-color: #27272a;
    --error-color: #ef4444;
    --success-color: #22c55e;
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html,
body {
    height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

/* Container */
.container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    max-width: 720px;
    margin: 0 auto;
    width: 100%;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #8b5cf6, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

/* Search Section */
.search-section {
    width: 100%;
    margin-bottom: 2rem;
}

.search-wrapper {
    display: flex;
    gap: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0.5rem;
    transition: var(--transition);
}

.search-wrapper:focus-within {
    border-color: var(--accent-mp3);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    color: var(--text-primary);
    outline: none;
}

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

.search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-mp3), var(--accent-mp4));
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

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

.search-icon {
    color: white;
}

.hint {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* Result Card */
.result-card {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    animation: slideUp 0.4s ease-out;
    box-shadow: var(--shadow-lg);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.card-content {
    padding: 1.5rem;
}

.thumbnail-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.25rem;
}

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

.duration {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
}

.video-info {
    margin-bottom: 1.5rem;
}

.video-title {
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    word-break: break-word;
}

.uploader {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Download Buttons */
.download-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    color: white;
}

.download-btn.mp3 {
    background: var(--accent-mp3);
}

.download-btn.mp3:hover {
    background: var(--accent-mp3-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.35);
}

.download-btn.mp4 {
    background: var(--accent-mp4);
}

.download-btn.mp4:hover {
    background: var(--accent-mp4-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(6, 182, 212, 0.35);
}

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

.download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 11, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    z-index: 100;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-mp3);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

/* Error Message */
.error-message {
    width: 100%;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error-color);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    text-align: center;
    font-size: 0.9375rem;
    animation: shake 0.4s ease-out;
}

@keyframes shake {

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

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

/* Footer */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 1.5rem;
    }

    .logo {
        font-size: 2.5rem;
    }

    .download-buttons {
        grid-template-columns: 1fr;
    }

    .download-btn {
        padding: 0.875rem 1.25rem;
    }
}