/* =========================
   THEME VARIABLES
========================= */

:root {
    --bg: #0b0f14;         /* deep low-blue black */
    --bg2: #111827;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --card: #111827;
    --border: #1f2937;
    --accent: #60a5fa;
}

/* LIGHT MODE (for LASIK / HAO sensitivity users) */
html[data-theme="light"] {
    --bg: #f5f7fb;
    --bg2: #ffffff;
    --text: #111827;
    --muted: #4b5563;
    --card: #ffffff;
    --border: #d1d5db;
    --accent: #2563eb;
}

/* =========================
   BASE
========================= */

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background 0.25s ease, color 0.25s ease;
}

/* =========================
   TOP BAR
========================= */

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-weight: bold;
    font-size: 18px;
}

/* =========================
   THEME BUTTON (IMPORTANT PART)
========================= */

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 999px;
    width: 42px;
    height: 42px;
    cursor: pointer;

    display: flex;
    align-items: center;
    justify-content: center;

    transition: 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--accent);
    transform: scale(1.05);
}

.theme-toggle .icon {
    font-size: 18px;
}

/* =========================
   NAV
========================= */

.nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 10px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
}

.nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    transition: 0.2s;
}

.nav a:hover {
    background: rgba(96,165,250,0.1);
    color: var(--text);
}

/* =========================
   MAIN
========================= */

.container {
    max-width: 1100px;
    margin: auto;
    padding: 40px 20px;
}

/* HERO */

.hero {
    text-align: center;
    margin-bottom: 40px;
}

.hero p {
    color: var(--muted);
}

/* GRID */

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

/* CARDS */

.card {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 18px;
    border-radius: 14px;
    text-decoration: none;
    color: var(--text);
    transition: 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
}

.card p {
    color: var(--muted);
}

/* FOOTER */

.footer {
    text-align: center;
    padding: 30px;
    color: var(--muted);
    border-top: 1px solid var(--border);
}


.article {
    margin-bottom: 40px;
}

.img {
    width: 100%;
    border-radius: 12px;
    margin: 15px 0;
    border: 1px solid var(--border);
}

.audio-btn {
    margin-top: 15px;
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    cursor: pointer;
}

.audio-btn:hover {
    border-color: var(--accent);
}

/* collapsible section */
.collapse-btn {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    cursor: pointer;
}

.collapse-content {
    display: none;
    margin-top: 10px;
    padding: 10px;
    border-left: 2px solid var(--accent);
}


.q-form {
    display: none;
    margin-top: 30px;
    background: var(--card);
    padding: 20px;
    border-radius: 14px;
    border: 1px solid var(--border);
}

.q-form.active {
    display: block;
}

label {
    display: block;
    margin-top: 15px;
    margin-bottom: 5px;
    color: var(--muted);
}

select, input {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg2);
    color: var(--text);
}

.q-btn {
    cursor: pointer;
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.admin-card {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 15px;
    border-radius: 12px;
}

.admin-card pre {
    white-space: pre-wrap;
    color: var(--muted);
}