:root {
    --font-head: 'Sora', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Dark (default) */
    --bg:       #09111f;
    --bg2:      #0e1a2e;
    --bg3:      #132038;
    --surface:  #162540;
    --surface2: #1b2d4d;
    --border:   #1e3460;
    --border2:  #2a4278;

    --text:     #e8f0ff;
    --text1:    #e8f0ff;
    --text2:    #8da4cc;
    --text3:    #4d6690;

    --accent:   #2563eb;
    --accent-h: #3b82f6;
    --accent-s: #dbeafe;
    --accent-alpha: rgba(37, 99, 235, 0.24);

    /* Técnicos */
    --c-inf:    #2563eb;
    --c-inf-bg: #1e3a6e;
    --c-inf-t:  #bfdbfe;
    --c-enf:    #059669;
    --c-enf-bg: #064e3b;
    --c-enf-t:  #a7f3d0;
    --c-adm:    #7c3aed;
    --c-adm-bg: #3b1f6e;
    --c-adm-t:  #ddd6fe;
    --c-com:    #d97706;
    --c-com-bg: #5c3a0a;
    --c-com-t:  #fde68a;

    --radius:    10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow:    0 2px 16px rgba(0,0,0,.35);
}

[data-theme="light"] {
    --bg:       #f4f7ff;
    --bg2:      #e8eeff;
    --bg3:      #dde5ff;
    --surface:  #ffffff;
    --surface2: #f0f4ff;
    --border:   #c7d2fe;
    --border2:  #a5b4fc;

    --text:     #0f172a;
    --text1:    #0f172a;
    --text2:    #374151;
    --text3:    #6b7280;

    --accent:   #2563eb;
    --accent-h: #1d4ed8;
    --accent-s: #eff6ff;
    --accent-alpha: rgba(37, 99, 235, 0.18);

    --c-inf:    #1d4ed8;
    --c-inf-bg: #dbeafe;
    --c-inf-t:  #1e3a8a;
    --c-enf:    #047857;
    --c-enf-bg: #d1fae5;
    --c-enf-t:  #064e3b;
    --c-adm:    #6d28d9;
    --c-adm-bg: #ede9fe;
    --c-adm-t:  #3b0764;
    --c-com:    #b45309;
    --c-com-bg: #fef3c7;
    --c-com-t:  #451a03;

    --shadow:   0 2px 16px rgba(37,99,235,.08);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
    min-height: 100vh;
    transition: background .3s, color .3s;
}
a { color: var(--accent-h); text-decoration: none; }
a:hover { text-decoration: underline; }
h1,h2,h3,h4 { font-family: var(--font-head); font-weight: 700; line-height: 1.25; color: var(--text); }

/* ── NAVBAR ── */
.navbar {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    height: 56px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar-brand {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 18px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.navbar-brand .brand-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-h);
}
.navbar-brand .brand-icon svg {
    width: 20px;
    height: 20px;
    display: block;
}
.navbar-brand .brand-name {
    display: inline-flex;
    align-items: baseline;
    gap: 4px;
}
.navbar-brand .brand-accent { color: var(--accent-h); }
.navbar-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}
.nav-link {
    color: var(--text2);
    font-size: 13px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius);
    transition: background .15s, color .15s;
    border: none;
    background: none;
    cursor: pointer;
}
.nav-link:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.nav-link.active { background: var(--surface); color: var(--text); }

/* Role badge en navbar */
.role-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: .5px;
}
.role-estudiante { background: var(--c-inf-bg); color: var(--c-inf-t); }
.role-profesor   { background: var(--c-adm-bg); color: var(--c-adm-t); }
.role-admin      { background: var(--c-com-bg); color: var(--c-com-t); }

/* Theme toggle */
.theme-toggle {
    width: 34px; height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text2);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
    transition: background .15s, color .15s;
    flex-shrink: 0;
}
.theme-toggle span {
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle svg {
    width: 16px;
    height: 16px;
    display: block;
}
.theme-toggle:hover { background: var(--surface2); color: var(--text); }

.notif-menu {
    position: relative;
}

.notif-chip {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text2);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: background .15s, color .15s;
}

.notif-chip:hover {
    background: var(--surface2);
    color: var(--text);
}

.notif-icon {
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.notif-icon svg {
    width: 16px;
    height: 16px;
    display: block;
}

.notif-count {
    position: absolute;
    top: -6px;
    right: -6px;
    min-width: 18px;
    height: 18px;
    border-radius: 999px;
    background: #ef4444;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    line-height: 18px;
    text-align: center;
    padding: 0 5px;
    border: 1px solid var(--bg2);
}

.notif-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 280px;
    max-width: 360px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 10px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-4px);
    transition: opacity .18s ease, transform .18s ease;
    z-index: 120;
}

.notif-menu:hover .notif-dropdown,
.notif-menu:focus-within .notif-dropdown {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.notif-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    padding: 4px 4px 8px 4px;
    margin-bottom: 8px;
}

.notif-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.notif-link {
    color: var(--text2);
    font-size: 12px;
    font-weight: 500;
    padding: 6px 8px;
    border-radius: 8px;
    transition: background .15s, color .15s;
}

.notif-link:hover {
    background: var(--surface2);
    color: var(--text);
    text-decoration: none;
}

.user-menu {
    position: relative;
}

.user-chip {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text1);
    border-radius: 999px;
    padding: 4px 8px 4px 4px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.user-avatar {
    width: 24px;
    height: 24px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    letter-spacing: .3px;
}

.user-menu .user-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text1);
}

.user-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 260px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 10px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-4px);
    transition: opacity .18s ease, transform .18s ease;
    z-index: 120;
}

.user-menu:hover .user-dropdown,
.user-menu:focus-within .user-dropdown {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.user-dropdown-head {
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-bottom: 1px solid var(--border);
    padding: 4px 4px 8px 4px;
    margin-bottom: 8px;
}

.user-dropdown-meta {
    padding: 4px;
    font-size: 12px;
    color: var(--text2);
    line-height: 1.5;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
}

.user-dropdown-actions {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* ── SIDEBAR (dashboard) ── */
.layout-with-sidebar {
    display: flex;
    min-height: calc(100vh - 56px);
}
.sidebar {
    width: 220px;
    flex-shrink: 0;
    background: var(--bg2);
    border-right: 1px solid var(--border);
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.sidebar-section {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .8px;
    color: var(--text3);
    padding: 8px 10px 4px;
    margin-top: 8px;
}
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text2);
    font-size: 13px;
    font-weight: 500;
    padding: 8px 10px;
    border-radius: 8px;
    transition: background .15s, color .15s;
    text-decoration: none;
    border: none;
    background: none;
    cursor: pointer;
    width: 100%;
}
.sidebar-link:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.sidebar-link.active { background: var(--surface); color: var(--text); }
.sidebar-link.active .sidebar-icon { color: var(--accent-h); }
.sidebar-icon { font-size: 15px; width: 18px; text-align: center; }
.sidebar-spacer { flex: 1; }

/* ── MAIN CONTENT ── */
.main-content {
    flex: 1;
    padding: 28px 28px;
    overflow-y: auto;
}
.page-header {
    margin-bottom: 24px;
}
.page-header h1 { font-size: 22px; margin-bottom: 4px; }
.page-header p  { color: var(--text2); font-size: 14px; }

/* ── CARDS ── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
}
.card-sm { padding: 14px 16px; border-radius: var(--radius); }

/* Metric cards */
.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}
.metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
}
.metric-label { font-size: 11px; color: var(--text3); font-weight: 600; text-transform: uppercase; letter-spacing: .5px; margin-bottom: 6px; }
.metric-value { font-size: 26px; font-family: var(--font-head); font-weight: 700; color: var(--text); }
.metric-sub   { font-size: 11px; color: var(--text3); margin-top: 2px; }

/* ── BUTTONS ── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    transition: background .15s, color .15s, border-color .15s;
    text-decoration: none;
}
.btn:hover { background: var(--surface2); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-h); border-color: var(--accent-h); }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-full { width: 100%; }
.btn-danger { background: #7f1d1d; border-color: #991b1b; color: #fecaca; }
.btn-danger:hover { background: #991b1b; }

/* ── FORMS ── */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text2);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: .4px;
}
.form-control {
    width: 100%;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 9px 13px;
    font-size: 13px;
    color: var(--text);
    font-family: var(--font-body);
    outline: none;
    transition: border-color .15s;
}
.form-control::placeholder { color: var(--text3); }
.form-control:focus { border-color: var(--accent); }
.form-control:hover { border-color: var(--border2); }
select.form-control { cursor: pointer; }

/* ── ALERTS / FLASH ── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 16px;
    border-left: 3px solid;
}
.alert-success { background: var(--c-enf-bg); color: var(--c-enf-t); border-color: var(--c-enf); }
.alert-danger  { background: #450a0a; color: #fca5a5; border-color: #dc2626; }
.alert-info    { background: var(--c-inf-bg); color: var(--c-inf-t); border-color: var(--c-inf); }
.alert-warning { background: var(--c-com-bg); color: var(--c-com-t); border-color: var(--c-com); }

/* ── BADGES TÉCNICOS ── */
.badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: .4px;
}
.badge-inf { background: var(--c-inf-bg); color: var(--c-inf-t); }
.badge-enf { background: var(--c-enf-bg); color: var(--c-enf-t); }
.badge-adm { background: var(--c-adm-bg); color: var(--c-adm-t); }
.badge-com { background: var(--c-com-bg); color: var(--c-com-t); }

/* ── TABLAS ── */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
    background: var(--bg2);
    color: var(--text3);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    padding: 10px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
tbody td {
    padding: 11px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--surface2); }

/* ── UTILS ── */
.text-muted  { color: var(--text2); }
.text-small  { font-size: 12px; }
.text-center { text-align: center; }
.mb-1  { margin-bottom: 8px; }
.mb-2  { margin-bottom: 16px; }
.mb-3  { margin-bottom: 24px; }
.mt-1  { margin-top: 8px; }
.mt-2  { margin-top: 16px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.flex-1 { flex: 1; }
.divider { height: 1px; background: var(--border); margin: 20px 0; }

/* ── FLASH MESSAGES (Flask) ── */
.flash-container { padding: 0 28px; }

.notif-toast {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 1400;
    min-width: 260px;
    max-width: 340px;
    background: var(--surface);
    color: var(--text1);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    opacity: 0;
    transform: translateY(8px);
    animation: toastIn .18s ease forwards;
    cursor: pointer;
}

.notif-toast strong {
    font-size: 13px;
    font-weight: 700;
    display: block;
    margin-bottom: 2px;
}

.notif-toast span {
    font-size: 12px;
    color: var(--text2);
}

.notif-toast a {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-h);
    text-decoration: none;
    white-space: nowrap;
}

.notif-toast.hide {
    animation: toastOut .2s ease forwards;
}

@keyframes toastIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toastOut {
    to {
        opacity: 0;
        transform: translateY(8px);
    }
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-content { padding: 20px 16px; }
    .navbar { padding: 0 16px; }
    .notif-dropdown {
        right: -48px;
        min-width: 240px;
    }
    .user-menu .user-name {
        display: none;
    }
    .notif-toast {
        right: 12px;
        left: 12px;
        bottom: 12px;
        min-width: auto;
        max-width: none;
    }
}