:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --bad-chord: #ef4444;
    --good-chord: #10b981;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.app-container {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.lang-switcher {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 16px;
}

.lang-btn {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    font-family: inherit;
}

.lang-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
}

.lang-btn.active {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

header {
    text-align: center;
    margin-bottom: 10px;
}

header h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

main {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.card h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-main);
}

input[type="text"] {
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.blacklist-container label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.primary-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 16px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
}

.share-btn {
    width: 100%;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.share-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
}

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

.hidden {
    display: none !important;
}

.results-section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    backdrop-filter: blur(12px);
    text-align: center;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.capo-badge {
    display: inline-block;
    background: rgba(16, 185, 129, 0.2);
    color: var(--good-chord);
    border: 1px solid rgba(16, 185, 129, 0.4);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 800;
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.chords-display {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.chord-pill {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.chord-pill:hover {
    background: rgba(255, 255, 255, 0.1);
}

.chord-pill.original {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.chord-pill.result {
    color: var(--text-main);
}

.footer {
    text-align: center;
    padding: 16px 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--primary);
}