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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --green-primary: #1DB954;
    --green-hover: #1ed760;
    --green-dark: #169c46;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --border-color: #282828;
    --error: #e74c3c;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0d1f0c 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
    text-align: center;
}

/* Logo Section */
.logo-section {
    margin-bottom: 40px;
}

.spotify-icon {
    width: 80px;
    height: 80px;
    fill: var(--green-primary);
    margin-bottom: 20px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.logo-section h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(90deg, var(--text-primary), var(--green-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Input Section */
.input-section {
    margin-bottom: 30px;
}

.input-wrapper {
    position: relative;
    margin-bottom: 20px;
}

.spotify-input {
    width: 100%;
    padding: 18px 50px 18px 20px;
    font-size: 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    outline: none;
    transition: all 0.3s ease;
}

.spotify-input:focus {
    border-color: var(--green-primary);
    box-shadow: 0 0 20px rgba(29, 185, 84, 0.3);
}

.spotify-input::placeholder {
    color: var(--text-secondary);
}

.paste-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.paste-icon:hover {
    color: var(--green-primary);
}

.download-btn {
    width: 100%;
    padding: 18px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--bg-primary);
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-hover) 100%);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(29, 185, 84, 0.4);
}

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

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

.download-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Loading */
.loading {
    margin: 30px 0;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--green-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

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

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

/* Result */
.result {
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 20px;
    margin: 30px 0;
    border: 1px solid var(--border-color);
}

.track-info {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.track-image {
    width: 80px;
    height: 80px;
    border-radius: 8px;
    object-fit: cover;
}

.track-details {
    flex: 1;
    text-align: left;
}

.track-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.track-artist {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.result-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px;
    background: var(--green-primary);
    color: var(--bg-primary);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.result-download-btn:hover {
    background: var(--green-hover);
    transform: translateY(-2px);
}

.result-download-btn svg {
    width: 20px;
    height: 20px;
}

/* Error */
.error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--error);
    border-radius: 12px;
    padding: 15px 20px;
    margin: 20px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--error);
}

.error svg {
    width: 24px;
    height: 24px;
}

/* Info Section */
.info-section {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 25px;
    margin-top: 40px;
    text-align: left;
}

.info-section h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--green-primary);
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.step {
    display: flex;
    align-items: center;
    gap: 15px;
}

.step-number {
    width: 32px;
    height: 32px;
    background: var(--green-primary);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
footer {
    margin-top: 40px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 600px) {
    .logo-section h1 {
        font-size: 2rem;
    }

    .track-info {
        flex-direction: column;
        text-align: center;
    }

    .track-details {
        text-align: center;
    }
}