:root {
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-happy: #facc15;
    --accent-sad: #60a5fa;
    --accent-energetic: #f87171;
    --accent-relaxed: #4ade80;
    --accent-focused: #a78bfa;
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(30, 41, 59, 0.5) 0%, rgba(15, 23, 42, 1) 100%);
    z-index: -1;
}

.container {
    max-width: 800px;
    width: 90%;
    text-align: center;
    padding: 2rem;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

.mood-selector {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-bottom: 4rem;
}

.mood-btn {
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: 50px;
    background-color: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.mood-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
}

.mood-btn[data-mood="happy"]:hover { border-color: var(--accent-happy); color: var(--accent-happy); }
.mood-btn[data-mood="sad"]:hover { border-color: var(--accent-sad); color: var(--accent-sad); }
.mood-btn[data-mood="energetic"]:hover { border-color: var(--accent-energetic); color: var(--accent-energetic); }
.mood-btn[data-mood="relaxed"]:hover { border-color: var(--accent-relaxed); color: var(--accent-relaxed); }
.mood-btn[data-mood="focused"]:hover { border-color: var(--accent-focused); color: var(--accent-focused); }

.recommendation-card {
    background-color: var(--card-bg);
    border-radius: 24px;
    padding: 3rem;
    max-width: 500px;
    margin: 0 auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.6s ease-out;
}

.hidden {
    display: none;
}

.card-content h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.card-content h3 {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.action-btn {
    padding: 15px 30px;
    border-radius: 12px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.action-btn.primary {
    background: linear-gradient(to right, #3b82f6, #8b5cf6);
    color: white;
}

.action-btn.secondary {
    background-color: transparent;
    border: 2px solid #475569;
    color: var(--text-primary);
}

.action-btn:hover {
    filter: brightness(1.1);
    transform: scale(1.02);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 640px) {
    header h1 { font-size: 2.2rem; }
    .mood-selector { gap: 10px; }
    .mood-btn { padding: 10px 18px; font-size: 0.9rem; }
}