:root {
    --bg-dark: #0f111a;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-1: #3b82f6;
    --accent-2: #8b5cf6;
    --accent-3: #ec4899;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Background Animated Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    filter: blur(100px);
}

.blob {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
    animation: float 20s infinite ease-in-out alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-1);
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-2);
    bottom: -200px;
    right: -100px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 50px) scale(1.2); }
}

/* Main Container */
.container {
    max-width: 1200px;
    width: 100%;
    padding: 3rem 2rem;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeInDown 1s ease-out;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

header h1 span {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    font-size: 1.2rem;
    color: var(--text-muted);
}

/* Groups Container */
.groups-container {
    display: flex;
    gap: 3rem;
    justify-content: center;
    flex-wrap: wrap;
}

.group-card {
    flex: 1;
    min-width: 350px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.group-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.6);
    border-color: rgba(255, 255, 255, 0.15);
}

.group-card h2 {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-main);
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1rem;
}

.total-hours {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2.5rem;
    background: rgba(0,0,0,0.2);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
}

.total-hours .number {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(to bottom, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 15px rgba(255,255,255,0.2));
}

.total-hours .label {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-1);
    margin-top: 0.5rem;
}

/* Subject List */
.subject-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.subject-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.subject-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    transform: scale(1.02);
}

.subject-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.subject-hours {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-weight: 800;
    font-size: 0.9rem;
}

/* Specific colors for generic subjects to make them pop */
.subject-item[data-subject="Odborná praxe"] .subject-hours { background: rgba(139, 92, 246, 0.2); color: #a78bfa; }
.subject-item[data-subject="Maturitní projekty"] .subject-hours { background: rgba(236, 72, 153, 0.2); color: #f472b6; }

footer {
    text-align: center;
    margin-top: 4rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* Responsive */
@media (max-width: 768px) {
    header h1 { font-size: 2.5rem; }
    .group-card { min-width: 100%; }
}