/* ============================================================
   Curso Autogestionado — UPMS
   Diseño NIEVE (Notion/Linear style)
   Ultra minimal: bordes hairline, tipografía protagonista,
   sin sombras, sidebar blanco. Acento de marca #25604C.
   ============================================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font-family);
    background: var(--bg-light);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

/* ---------------- Layout ---------------- */
.app-layout { display: flex; min-height: 100vh; }

.main-content {
    flex: 1;
    margin-left: 250px;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.page-content { padding: 24px 28px; flex: 1; }

/* ---------------- Sidebar (blanco) ---------------- */
.sidebar {
    width: 250px;
    background: #ffffff;
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo { width: 36px; height: 36px; }

.sidebar-brand { line-height: 1.2; }
.sidebar-brand strong { font-size: 14px; font-weight: 700; display: block; }
.sidebar-brand small { font-size: 11px; color: var(--text-light); }

.sidebar-nav { flex: 1; padding: 10px 0; }

.nav-section {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-light);
    padding: 14px 20px 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    padding: 8px 12px;
    margin: 1px 8px;
    border-radius: var(--radius);
    font-size: 13.5px;
    font-weight: 500;
    transition: background .12s, color .12s;
}
.nav-item:hover { background: #f0f0f0; color: var(--text-primary); }
.nav-item.active { background: #f0f0f0; color: var(--text-primary); font-weight: 600; }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item.active svg { color: var(--primary); stroke: var(--primary); }

.nav-badge {
    margin-left: auto;
    background: #2563eb;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    border-radius: 10px;
    padding: 1px 7px;
}

.sidebar-footer { border-top: 1px solid var(--border-color); padding: 12px 16px; }

.btn-logout {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    background: none;
    border: none;
    cursor: pointer;
    width: 100%;
    padding: 6px 4px;
    border-radius: var(--radius);
}
.btn-logout:hover { color: var(--danger); }

/* ---------------- Topbar ---------------- */
.top-bar {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 14px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.top-bar h1 { font-size: 17px; font-weight: 700; letter-spacing: -0.3px; }

.top-bar-user { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-secondary); }

.user-avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 12px;
}

/* ---------------- Cards ---------------- */
.card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
}
.card:hover { border-color: #cccccc; }
.card + .card { margin-top: 16px; }

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}
.card-title { font-size: 15px; font-weight: 700; letter-spacing: -0.2px; }

/* ---------------- Stat cards ---------------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px;
    margin-bottom: 22px;
}

.stat-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 18px 20px;
}
.stat-card:hover { border-color: #cccccc; }

.stat-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 8px;
}

.stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1;
    color: var(--text-primary);
}

.stat-hint { font-size: 12px; color: var(--text-secondary); margin-top: 6px; }

/* ---------------- Botones ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background .12s, border-color .12s;
    box-shadow: none;
}
.btn svg { width: 15px; height: 15px; }

.btn-primary { background: #111111; border-color: #111111; color: #ffffff; }
.btn-primary:hover { background: #333333; border-color: #333333; }

.btn-secondary { background: #ffffff; border-color: var(--border-color); color: var(--text-primary); }
.btn-secondary:hover { background: #f0f0f0; }

.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-danger  { background: var(--danger);  border-color: var(--danger);  color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ---------------- Badges (outlined) ---------------- */
.badge {
    display: inline-block;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: 4px;
    padding: 2px 7px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    color: #374151;
}
.badge-success { border-color: #86efac; color: #166534; }
.badge-info    { border-color: #93c5fd; color: #1e40af; }
.badge-warning { border-color: #fde68a; color: #92400e; }
.badge-danger  { border-color: #fca5a5; color: #991b1b; }

/* ---------------- Alertas ---------------- */
.alert { padding: 11px 14px; border-radius: var(--radius); border: 1px solid; font-size: 13px; margin-bottom: 16px; }
.alert-success { background: #f0fdf4; color: #166534; border-color: #86efac; }
.alert-danger  { background: #fef2f2; color: #991b1b; border-color: #fca5a5; }
.alert-warning { background: #fffbeb; color: #92400e; border-color: #fde68a; }
.alert-info    { background: #eff6ff; color: #1e40af; border-color: #93c5fd; }

/* ---------------- Tablas ---------------- */
.table-card { background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius); overflow: hidden; }

.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table thead th {
    background: var(--bg-light);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-light);
    text-align: left;
    padding: 9px 14px;
    border-bottom: 1px solid var(--border-color);
}
.table tbody td { padding: 10px 14px; border-bottom: 1px solid #f0f0f0; }
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: #f5f5f5; }

/* ---------------- Formularios ---------------- */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12.5px; font-weight: 600; margin-bottom: 5px; }

.form-control, .form-select {
    width: 100%;
    font-family: inherit;
    font-size: 13.5px;
    padding: 8px 11px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text-primary);
    transition: border-color .12s, box-shadow .12s;
}
.form-control:focus, .form-select:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37,99,235,.08);
}
.form-control.is-invalid { border-color: var(--danger); }
.form-error { font-size: 12px; color: var(--danger); margin-top: 4px; }

/* ---------------- Progreso ---------------- */
.progress { height: 4px; background: #f0f0f0; border-radius: 2px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--primary); border-radius: 2px; transition: width .4s ease; }

/* ---------------- Paginación ---------------- */
.pagination { display: flex; gap: 5px; margin-top: 16px; }
.page-link {
    padding: 6px 11px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 13px;
    color: var(--text-secondary);
    background: #fff;
}
.page-link:hover { background: #f0f0f0; }
.page-item.active .page-link { background: #111111; border-color: #111111; color: #fff; }

/* ---------------- Login ---------------- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    padding: 20px;
}
.login-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 36px 32px;
    width: 100%;
    max-width: 380px;
}
.login-logo { display: block; width: 64px; margin: 0 auto 14px; }
.login-title { text-align: center; font-size: 18px; font-weight: 800; letter-spacing: -0.4px; margin-bottom: 2px; }
.login-sub { text-align: center; font-size: 12.5px; color: var(--text-secondary); margin-bottom: 24px; }

/* ---------------- Responsive ---------------- */
.sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 18px; right: 18px;
    z-index: 200;
    width: 46px; height: 46px;
    border-radius: 50%;
    background: #111111;
    color: #fff;
    border: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}
.sidebar-toggle:hover { background: #333333; }

@media (max-width: 900px) {
    .sidebar { transform: translateX(-100%); transition: transform .2s ease; }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .sidebar-toggle { display: flex; }
    .page-content { padding: 18px 16px; }
    .top-bar { padding: 12px 16px; }
}

/* ---------------- Print (membrete institucional) ---------------- */
@media print {
    .sidebar, .top-bar, .sidebar-toggle, .btn, .no-print { display: none !important; }
    .main-content { margin-left: 0; }
    body { background: #fff; }
    .card, .stat-card, .table-card { border: 1px solid #ccc; }
}