:root {
    --bg: #f4efe6;
    --panel: #fffdf8;
    --panel-strong: #f8f1e5;
    --ink: #1f2a30;
    --muted: #637176;
    --line: #d8ccbb;
    --accent: #b24c3d;
    --accent-dark: #7b2f23;
    --accent-soft: #f3ddd5;
    --success: #2b6a4f;
    --warning: #8a5b17;
    --danger: #9d2d2d;
    --shadow: 0 14px 40px rgba(76, 48, 24, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(178, 76, 61, 0.12), transparent 28%),
        radial-gradient(circle at top right, rgba(111, 139, 98, 0.16), transparent 24%),
        linear-gradient(180deg, #f8f3eb 0%, #f3ecdf 100%);
    color: var(--ink);
}

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

.site-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-header {
    padding: 28px clamp(20px, 4vw, 48px) 18px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
}

.brand-link {
    font-size: clamp(26px, 3.2vw, 40px);
    font-weight: 800;
    letter-spacing: 0.03em;
}

.brand-subtitle {
    margin: 6px 0 0;
    color: var(--muted);
}

.user-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.user-role {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--panel-strong);
    border: 1px solid var(--line);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 0 clamp(20px, 4vw, 48px) 12px;
}

.nav-link {
    padding: 10px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(216, 204, 187, 0.9);
    color: var(--muted);
}

.nav-link-active,
.nav-link:hover {
    background: var(--ink);
    color: #fff;
    border-color: var(--ink);
}

.page-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto 36px;
    flex: 1;
}

.page-title h1 {
    margin: 10px 0 16px;
    font-size: clamp(28px, 3vw, 42px);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
}

.card,
.panel,
.form-panel,
.table-panel {
    background: rgba(255, 253, 248, 0.92);
    border: 1px solid rgba(216, 204, 187, 0.9);
    border-radius: 22px;
    padding: 22px;
    box-shadow: var(--shadow);
}

.card-label {
    color: var(--muted);
    margin-bottom: 10px;
}

.card-value {
    font-size: 34px;
    font-weight: 800;
}

.stack {
    display: grid;
    gap: 18px;
}

.two-column {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 18px;
}

.login-shell {
    width: min(920px, calc(100% - 32px));
    margin: 40px auto;
    display: grid;
    grid-template-columns: 1fr 0.9fr;
    gap: 22px;
    align-items: stretch;
}

.hero-panel {
    padding: 30px;
    border-radius: 26px;
    background:
        linear-gradient(140deg, rgba(31, 42, 48, 0.95), rgba(53, 71, 79, 0.96)),
        linear-gradient(45deg, rgba(178, 76, 61, 0.25), transparent);
    color: #fff;
    box-shadow: var(--shadow);
}

.hero-panel p {
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.75;
}

.feature-list {
    margin: 18px 0 0;
    padding-left: 18px;
}

.feature-list li {
    margin: 10px 0;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.field {
    display: grid;
    gap: 8px;
}

label {
    font-size: 14px;
    font-weight: 700;
    color: var(--muted);
}

input,
select,
textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
    font: inherit;
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.button-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

button,
.button,
.ghost-button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 11px 18px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

button,
.button {
    background: var(--accent);
    color: #fff;
}

button:hover,
.button:hover {
    background: var(--accent-dark);
}

.ghost-button {
    background: #fff;
    border: 1px solid var(--line);
    color: var(--ink);
}

.ghost-button:hover {
    border-color: var(--ink);
}

.button-danger {
    background: var(--danger);
}

.button-secondary {
    background: var(--ink);
}

.flash {
    margin-bottom: 16px;
    padding: 14px 18px;
    border-radius: 14px;
    border: 1px solid transparent;
    font-weight: 600;
}

.flash-success {
    background: rgba(43, 106, 79, 0.12);
    border-color: rgba(43, 106, 79, 0.26);
    color: var(--success);
}

.flash-error {
    background: rgba(157, 45, 45, 0.12);
    border-color: rgba(157, 45, 45, 0.24);
    color: var(--danger);
}

.table-panel {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 12px 10px;
    border-bottom: 1px solid rgba(216, 204, 187, 0.8);
    text-align: left;
    vertical-align: top;
}

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

.inline-form {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.inline-form input,
.inline-form select {
    width: auto;
    min-width: 90px;
}

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

.pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent-dark);
    font-size: 13px;
    font-weight: 700;
}

.status-enrolled,
.status-dropped {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

.status-enrolled {
    background: rgba(43, 106, 79, 0.12);
    color: var(--success);
}

.status-dropped {
    background: rgba(157, 45, 45, 0.12);
    color: var(--danger);
}

.site-footer {
    padding: 18px 24px 28px;
    text-align: center;
    color: var(--muted);
}

@media (max-width: 900px) {
    .login-shell,
    .two-column {
        grid-template-columns: 1fr;
    }

    .site-header {
        flex-direction: column;
        align-items: flex-start;
    }
}