:root {
    --spotify-green: #1ed760;
    --spotify-green-dark: #1db954;
    --spotify-black: #0b0b0b;
    --spotify-dark: #121212;
    --spotify-gray: #181818;
    --spotify-card-hover: rgba(255, 255, 255, 0.1);
    --spotify-light-gray: #b3b3b3;
    --white: #ffffff;
    --error-red: #ff4d4d;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: rgba(0, 0, 0, 0.4);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: radial-gradient(circle at top left, #121212 0%, #050505 100%);
    min-height: 100vh;
    color: var(--white);
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Vibrant Animated Background Blobs */
.background-glass {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: #050505;
    overflow: hidden;
}

.blob {
    position: absolute;
    width: 500px;
    height: 500px;
    background: var(--spotify-green);
    filter: blur(80px);
    border-radius: 50%;
    opacity: 0.12;
    animation: moveBlob 20s infinite alternate;
}

.blob-1 {
    top: -100px;
    left: -100px;
}

.blob-2 {
    bottom: -150px;
    right: -100px;
    background: #1db954;
    animation-delay: -5s;
    opacity: 0.08;
}

.blob-3 {
    top: 30%;
    left: 70%;
    transform: translate(-50%, -50%);
    background: var(--spotify-green-dark);
    width: 600px;
    height: 600px;
    animation-duration: 35s;
    opacity: 0.05;
}

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

/* Glass Overlay for Grainy Texture */
.glass-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.01) 0%, transparent 100%);
    backdrop-filter: blur(100px);
    -webkit-backdrop-filter: blur(100px);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.logo i {
    font-size: 3rem;
    color: var(--spotify-green);
}

.logo h1 {
    font-family: 'Urbanist', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
}

.logo h1 span {
    color: var(--spotify-green);
}

.tagline {
    color: var(--spotify-light-gray);
    font-size: 0.95rem;
}

/* Advanced Glassmorphism Cards */
.search-box, .result-card, .skeleton-card {
    background: var(--glass-bg);
    backdrop-filter: blur(30px) saturate(150%);
    -webkit-backdrop-filter: blur(30px) saturate(150%);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    padding: 24px;
    box-shadow: 
        0 20px 40px var(--glass-shadow),
        inset 0 0 0 1px rgba(255, 255, 255, 0.05);
    margin-bottom: 24px;
    transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.search-box:hover, .result-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 
        0 30px 60px rgba(0, 0, 0, 0.6),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.input-wrapper {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 16px;
    padding: 6px 18px;
    margin-bottom: 16px;
    border: 1px solid rgba(255, 255, 255, 0.03);
    transition: all 0.4s ease;
}

.input-wrapper:focus-within {
    border-color: rgba(30, 215, 96, 0.5);
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 0 0 4px rgba(30, 215, 96, 0.1);
}

.input-wrapper input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 14px 12px;
    font-size: 1rem;
    color: var(--white);
    font-family: inherit;
    width: 100%;
}

.clear-btn {
    background: transparent;
    border: none;
    color: var(--spotify-light-gray);
    cursor: pointer;
    padding: 8px;
    transition: color 0.2s;
}

.clear-btn:hover {
    color: var(--white);
}

.download-btn:disabled {
    cursor: not-allowed;
    filter: grayscale(1);
    transform: none !important;
}

.loader {
    margin-bottom: 24px;
    text-align: center;
}

.loader-text {
    margin-top: 15px;
    color: var(--spotify-green);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.skeleton-card {
    padding: 0;
    flex-direction: column;
    display: flex;
    overflow: hidden;
}

.skeleton-image {
    width: 100%;
    aspect-ratio: 1/1;
    background: rgba(255, 255, 255, 0.05);
}

.skeleton-info {
    padding: 24px;
}

.skeleton-line {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.skeleton-meta {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.pulse {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0% { opacity: 0.3; }
    50% { opacity: 0.7; }
    100% { opacity: 0.3; }
}

@media (min-width: 768px) {
    .skeleton-card { flex-direction: row; }
    .skeleton-image { width: 240px; }
    .skeleton-info { flex: 1; }
}

.spinner {
    display: none;
}

.error-message {
    background: rgba(255, 77, 77, 0.1);
    border: 1px solid var(--error-red);
    color: var(--error-red);
    padding: 15px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

.download-btn {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--spotify-green) 0%, var(--spotify-green-dark) 100%);
    border: none;
    border-radius: 16px;
    color: #000;
    font-family: 'Urbanist', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 20px rgba(30, 215, 96, 0.2);
}

.download-btn:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 15px 30px rgba(30, 215, 96, 0.3);
    filter: brightness(1.1);
}

.result-card {
    padding: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    margin-top: 20px;
    transition: all 0.4s ease;
}

.track-image {
    width: 100%;
    aspect-ratio: 1/1;
    overflow: hidden;
}

.track-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.track-info {
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
}

.track-details {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.artist {
    color: #b3b3b3;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
}

.track-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 5px;
}

.download-track-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--spotify-green);
    color: #000;
    padding: 14px 32px;
    border-radius: 500px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1rem;
    width: fit-content;
    margin-top: 15px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 20px rgba(30, 215, 96, 0.2);
}

@media (min-width: 768px) {
    .result-card {
        flex-direction: row;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }
    .track-image {
        width: 250px;
        height: 250px;
    }
    .track-info {
        align-items: flex-start;
        text-align: left;
        padding: 30px;
    }
    .track-details {
        align-items: flex-start;
    }
    .artist {
        justify-content: flex-start;
    }
    .track-meta {
        justify-content: flex-start;
    }
}

.download-track-btn:hover {
    transform: translateY(-3px) scale(1.02);
    background: var(--spotify-green);
    box-shadow: 0 15px 35px rgba(30, 215, 96, 0.2);
}

footer {
    text-align: center;
    padding: 40px 0;
    color: var(--spotify-light-gray);
    font-size: 0.9rem;
}

.author-link {
    color: var(--spotify-green);
    text-decoration: none;
    font-weight: 700;
}

.hidden { display: none !important; }

@media (min-width: 768px) {
    .result-card { display: flex; }
    .track-image { width: 240px; }
}