/* --- DOMYŚLNE ZMIENNE (JASNE / LIGHT) --- */
:root {
    --bg-color: #f4f6f8;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-sec: #606f7b;
    --accent: #007bff;
    --border: #dce1e6;
    --header-grad-1: #ffffff;
    --header-grad-2: #f4f6f8;
    --hover-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --btn-bg: #e2e6ea;
    --btn-text: #2c3e50;
}

/* --- SYSTEMOWY DARK MODE (Automatyczny) --- */
/* To zadziała SAMO, jeśli system jest ciemny, nawet bez JS */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0f0f13;
        --card-bg: #1e1e24;
        --text-main: #ffffff;
        --text-sec: #aaaaaa;
        --accent: #00d4ff;
        --border: #333;
        --header-grad-1: #2a2a35;
        --header-grad-2: #0f0f13;
        --hover-shadow: 0 10px 30px rgba(0, 212, 255, 0.15);
        --btn-bg: #2a2a35;
        --btn-text: #fff;
    }
}

/* --- WYMUSZONY DARK MODE (Przez przycisk) --- */
/* Powielamy zmienne ciemne dla atrybutu data-theme="dark" */
[data-theme="dark"] {
    --bg-color: #0f0f13;
    --card-bg: #1e1e24;
    --text-main: #ffffff;
    --text-sec: #aaaaaa;
    --accent: #00d4ff;
    --border: #333;
    --header-grad-1: #2a2a35;
    --header-grad-2: #0f0f13;
    --hover-shadow: 0 10px 30px rgba(0, 212, 255, 0.15);
    --btn-bg: #2a2a35;
    --btn-text: #fff;
}

/* --- WYMUSZONY LIGHT MODE (Przez przycisk) --- */
/* Nadpisujemy media query, jeśli ktoś ma ciemny system, ale chce jasną stronę */
[data-theme="light"] {
    --bg-color: #f4f6f8;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-sec: #606f7b;
    --accent: #007bff;
    --border: #dce1e6;
    --header-grad-1: #ffffff;
    --header-grad-2: #f4f6f8;
    --hover-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --btn-bg: #e2e6ea;
    --btn-text: #2c3e50;
}

/* --- RESZTA STYLÓW (Bez zmian) --- */
body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

header {
    text-align: center;
    padding: 30px 20px;
    background: radial-gradient(circle at top, var(--header-grad-1) 0%, var(--header-grad-2) 100%);
    border-bottom: 1px solid var(--border);
    position: relative;
}

h1 { margin: 0; font-size: 2.5rem; letter-spacing: 2px; text-transform: uppercase; }
header p { color: var(--text-sec); margin-top: 10px; font-weight: 500; }

.theme-toggle {
    position: absolute; top: 20px; right: 20px;
    background: var(--btn-bg); border: 1px solid var(--border);
    color: var(--btn-text); padding: 8px 12px; border-radius: 20px;
    cursor: pointer; font-size: 1.2rem; transition: all 0.2s;
}
.theme-toggle:hover { transform: scale(1.1); }

.gallery {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px; padding: 30px; max-width: 1200px; margin: 0 auto; width: 100%; box-sizing: border-box;
}

.card {
    background-color: var(--card-bg); border-radius: 12px; overflow: hidden;
    text-decoration: none; color: var(--text-main); border: 1px solid var(--border);
    display: flex; flex-direction: column; transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
}

.card:hover { transform: translateY(-5px); box-shadow: var(--hover-shadow); border-color: var(--accent); }

.card-image { width: 100%; height: 180px; background-size: cover; background-position: center; background-color: #000; }

.card-info { padding: 20px; display: flex; justify-content: space-between; align-items: center; }
.card-info h2 { margin: 0; font-size: 1.1rem; font-weight: 600; }

.play-btn {
    font-size: 0.8rem; background-color: var(--accent); color: #fff;
    padding: 6px 14px; border-radius: 20px; font-weight: bold; text-transform: uppercase;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

footer { margin-top: auto; text-align: center; padding: 20px; font-size: 0.8rem; color: var(--text-sec); border-top: 1px solid var(--border); }
.empty-msg, .error-msg { grid-column: 1 / -1; text-align: center; color: var(--text-sec); padding: 50px; }