:root {
    --bg-base: #09090b;
    --panel-bg: rgba(24, 24, 27, 0.65);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --accent-blue: #3b82f6;
    --accent-blue-glow: rgba(59, 130, 246, 0.35);
    --accent-red: #ef4444;
    --font-sans: 'Inter', sans-serif;
}

body {
    margin: 0; padding: 0;
    background-color: var(--bg-base);
    /* Jemné světelné záře v pozadí ladící k hlavnímu webu */
    background-image: 
        radial-gradient(circle at 85% 15%, rgba(59, 130, 246, 0.15), transparent 50%),
        radial-gradient(circle at 15% 85%, rgba(239, 68, 68, 0.12), transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex; flex-direction: column; align-items: center;
}

a { text-decoration: none; color: inherit; }

/* --- NAVIGACE --- */
nav {
    width: 100%; 
    border-bottom: 1px solid var(--panel-border);
    background: rgba(9, 9, 11, 0.8); 
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: sticky; top: 0; z-index: 100; 
    display: flex; justify-content: center;
}
.nav-content {
    width: 100%; max-width: 1050px; 
    display: flex; justify-content: space-between; align-items: center; 
    padding: 16px 30px; box-sizing: border-box;
}
.nav-logo { 
    font-size: 1rem; 
    font-weight: 700; 
    color: var(--text-main); 
    transition: color 0.2s, opacity 0.2s; 
}
.nav-logo:hover { opacity: 0.8; color: var(--accent-blue); }

.nav-right { 
    display: flex; align-items: center; gap: 8px; 
    font-size: 0.85rem; font-weight: 600; 
    color: var(--text-muted); 
}
.status-dot { 
    width: 8px; height: 8px; 
    background: #22c55e; 
    border-radius: 50%; 
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.6); 
    animation: pulse 2.5s infinite; 
}
@keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.4; } 100% { opacity: 1; } }

/* --- KONTEJNER --- */
.container { 
    width: 100%; max-width: 1050px; 
    padding: 50px 20px 60px 20px; 
    box-sizing: border-box; 
}

/* --- ČISTÁ HLAVIČKA --- */
.page-header { margin-bottom: 45px; }
.page-header h1 { 
    font-size: 2.8rem; 
    font-weight: 800; 
    letter-spacing: -1px; 
    margin: 0 0 12px 0; 
    color: #ffffff; 
}
.page-header p { 
    color: var(--text-muted); 
    font-size: 1.1rem; 
    margin: 0; 
    max-width: 650px; 
    line-height: 1.6; 
}

/* --- MŘÍŽKA PROJEKTŮ --- */
.project-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); 
    gap: 25px; 
}

/* --- KARTY PROJEKTŮ --- */
.project-card {
    background: var(--panel-bg); 
    border: 1px solid var(--panel-border);
    border-radius: 20px; 
    position: relative; 
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex; flex-direction: column;
}

.project-card:hover { 
    transform: translateY(-6px); 
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

/* Modrá záře v pozadí karty při najetí */
.card-glow {
    position: absolute; width: 180px; height: 180px; 
    background: var(--accent-blue);
    filter: blur(80px); opacity: 0; 
    top: -60px; left: -60px; 
    transition: opacity 0.4s ease; 
    pointer-events: none;
}
.project-card:hover .card-glow { opacity: 0.2; }

.card-content { 
    padding: 28px; 
    display: flex; flex-direction: column; 
    height: 100%; z-index: 1; 
    position: relative; box-sizing: border-box; 
}

.card-top { 
    display: flex; justify-content: space-between; 
    align-items: center; margin-bottom: 16px; 
}

.project-id { 
    font-size: 0.8rem; 
    font-weight: 700; 
    color: var(--accent-blue); 
    background: rgba(59, 130, 246, 0.1); 
    padding: 4px 10px; 
    border-radius: 20px; 
    border: 1px solid rgba(59, 130, 246, 0.2); 
}

.card-top h3 { 
    margin: 0; font-size: 1.35rem; 
    font-weight: 800; color: #fff; 
    letter-spacing: -0.3px; 
}

.card-content p { 
    color: var(--text-muted); 
    font-size: 0.95rem; 
    line-height: 1.6; 
    flex-grow: 1; 
    margin: 0 0 24px 0; 
}

/* --- ŠTÍTKY (TECH STACK) --- */
.tech-stack { 
    display: flex; flex-wrap: wrap; 
    gap: 8px; margin-bottom: 25px; 
}

.tech-stack span {
    background: rgba(255, 255, 255, 0.05); 
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #e4e4e7; 
    font-size: 0.78rem; 
    font-weight: 600;
    padding: 5px 11px; 
    border-radius: 8px; 
    transition: all 0.2s;
}

.project-card:hover .tech-stack span { 
    background: rgba(255, 255, 255, 0.1); 
    border-color: rgba(255, 255, 255, 0.2); 
}

/* --- ODKAZ NA SPODKU KARTY --- */
.project-link { 
    font-size: 0.9rem; 
    color: var(--accent-blue); 
    font-weight: 600; 
    align-self: flex-start; 
    transition: all 0.2s; 
    display: inline-flex; 
    align-items: center; 
    gap: 6px; 
}

.project-link:hover { 
    color: var(--accent-red); 
    transform: translateX(4px); 
}

/* --- RESPONZIVITA --- */
@media (max-width: 768px) {
    .page-header h1 { font-size: 2.1rem; }
    .nav-content { padding: 15px 20px; }
    .container { padding: 30px 15px; }
}