/* LMS-Lite — общий минимальный стиль для login и страниц потоков. */

:root {
    --bg: #f7f6f4;
    --paper: #ffffff;
    --ink: #1a1a1a;
    --ink-2: #555555;
    --muted: #8a8a8a;
    --line: #e6e3df;
    --accent: #1a1a1a;
    --accent-fg: #ffffff;
    --error: #c0392b;
    --radius: 10px;
    --maxw: 720px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
        "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--ink);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--line);
}
a:hover { text-decoration-color: var(--ink); }

.wrap {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 32px 20px 64px;
    width: 100%;
}

h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 28px; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 36px 0 12px; }
h3 { font-size: 18px; margin: 24px 0 8px; }

.muted { color: var(--muted); font-size: 14px; }

/* ── Login ──────────────────────────────────────────────────────────────── */

.login-logo {
    display: block;
    margin: max(6vh, 32px) auto 24px;
    text-align: center;
    text-decoration: none;
}
.login-logo img {
    display: inline-block;
    height: 34px;
    width: auto;
}

.login-card {
    max-width: 420px;
    margin: 0 auto;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 32px 28px;
}

.login-card h1 { margin-bottom: 4px; }
.login-card .sub { color: var(--ink-2); margin: 0 0 24px; }

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}
.field label { font-size: 14px; color: var(--ink-2); }
.field input {
    font: inherit;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    color: var(--ink);
    outline: none;
    transition: border-color 120ms ease;
}
.field input:focus { border-color: var(--ink); }

button.primary {
    width: 100%;
    min-height: 54px;
    padding: 14px 18px;
    background: var(--accent);
    color: var(--accent-fg);
    border: 0;
    border-radius: 8px;
    font: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 120ms ease;
}
button.primary:hover { opacity: 0.9; }
button.primary:disabled { opacity: 0.5; cursor: progress; }

button.secondary {
    width: 100%;
    min-height: 54px;
    padding: 14px 18px;
    background: var(--paper);
    color: var(--ink);
    border: 2px solid var(--ink);
    border-radius: 8px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 120ms ease, background 120ms ease;
}
button.secondary:hover {
    border-color: var(--ink);
    background: #f0efec;
}

.login-actions {
    display: grid;
    gap: 10px;
}

.error-msg {
    color: var(--error);
    font-size: 14px;
    margin: 0 0 12px;
    min-height: 20px;
}

/* ── Stream page ────────────────────────────────────────────────────────── */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    padding: 14px 20px;
    background: var(--paper);
}
.topbar .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    letter-spacing: -0.01em;
    text-decoration: none;
    color: var(--ink);
}
.topbar .brand img {
    height: 28px;
    width: auto;
    display: block;
    flex-shrink: 0;
}
.topbar .logout {
    color: var(--ink-2);
    font-size: 14px;
    text-decoration: none;
    border: 0;
    background: transparent;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 6px;
}
.topbar .logout:hover { background: var(--bg); color: var(--ink); }

.section {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin: 16px 0;
}

.video {
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    margin: 8px 0 12px;
}
.video iframe { width: 100%; height: 100%; border: 0; display: block; }

.materials { list-style: none; padding: 0; margin: 0; }
.materials li {
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}
.materials li:last-child { border-bottom: 0; }
.materials a {
    text-decoration: none;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 10px;
}
.materials a::before {
    content: "↗";
    color: var(--muted);
    font-size: 14px;
}

.note {
    background: #fffbe6;
    border: 1px solid #f4dd86;
    border-radius: 8px;
    padding: 12px 14px;
    color: #5c4a00;
    font-size: 14px;
}

@media (max-width: 540px) {
    .wrap { padding: 16px 16px 48px; }
    .login-card { padding: 24px 20px; }
    .section { padding: 16px 18px; }
    h1 { font-size: 24px; }
}