:root {
    --ink: #101c2c;
    --ink-2: #1b2e46;
    --paper: #f7f5f0;
    --card: #ffffff;
    --gold: #b8912f;
    --gold-soft: #e9dcb8;
    --muted: #6b7480;
    --line: #e4e1d8;
    --danger: #8a2f2f;
    --danger-bg: #fbe9e9;

    --font-display: Georgia, 'Iowan Old Style', 'Times New Roman', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

/* ---------- Login ---------- */

.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 15% 15%, rgba(184,145,47,0.10), transparent 45%),
        linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--card);
    border-radius: 4px;
    padding: 40px 36px 32px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.35);
    position: relative;
}

.login-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--gold), var(--gold-soft));
    border-radius: 4px 4px 0 0;
}

.login-mark {
    font-family: var(--font-display);
    font-size: 30px;
    letter-spacing: 0.04em;
    color: var(--ink);
    margin-bottom: 2px;
}
.login-mark span { color: var(--gold); }

.login-tag {
    margin: 0 0 28px;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.login-form { display: flex; flex-direction: column; gap: 6px; }

.login-form label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--ink-2);
    margin-top: 14px;
}

.login-form input {
    padding: 11px 12px;
    border: 1px solid var(--line);
    border-radius: 3px;
    font-size: 15px;
    font-family: var(--font-body);
    background: #fcfbf8;
    color: var(--ink);
}
.login-form input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(184,145,47,0.18);
    background: #fff;
}

.btn-primary {
    margin-top: 24px;
    padding: 13px 16px;
    background: var(--ink);
    color: #fff;
    border: none;
    border-radius: 3px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background 0.15s ease;
}
.btn-primary:hover { background: var(--ink-2); }

.login-foot {
    margin: 20px 0 0;
    font-size: 12.5px;
    color: var(--muted);
    text-align: center;
    line-height: 1.5;
}

.alert {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(138,47,47,0.25);
    border-radius: 3px;
    padding: 11px 14px;
    font-size: 13.5px;
    margin-bottom: 6px;
}

/* ---------- Panel de notas ---------- */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 32px;
    background: var(--ink);
    color: #fff;
}
.topbar__brand {
    font-family: var(--font-display);
    font-size: 20px;
    letter-spacing: 0.03em;
}
.topbar__brand span {
    font-family: var(--font-body);
    font-size: 13px;
    color: var(--gold-soft);
    font-weight: 400;
    margin-left: 6px;
}
.topbar__user {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
}
.btn-ghost {
    color: var(--gold-soft);
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.25);
    padding: 6px 14px;
    border-radius: 3px;
    font-size: 13px;
}
.btn-ghost:hover { background: rgba(255,255,255,0.08); }

.wrap {
    max-width: 780px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}

.course-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 22px 26px 8px;
    margin-bottom: 20px;
}
.course-card h2 {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: normal;
    margin: 0 0 14px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gold-soft);
    color: var(--ink);
}

.grades {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 14px;
}
.grades th {
    text-align: left;
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0 8px 8px;
    border-bottom: 1px solid var(--line);
}
.grades td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--line);
    font-size: 14.5px;
}
.grades tr:last-child td { border-bottom: none; }

.grade-value {
    font-family: var(--font-mono);
    font-weight: 600;
    text-align: right;
    color: var(--ink);
    background: #faf6ea;
    border-radius: 3px;
}

.muted { color: var(--muted); font-size: 13.5px; }

.empty {
    text-align: center;
    color: var(--muted);
    padding: 60px 20px;
    font-size: 15px;
}