/* =============================================
   TuClaseFácil — Estilos Globales Compartidos
   Todos los archivos PHP deben referenciar este CSS
   ============================================= */

/* ── Variables de Tema ── */
:root {
    --azul: #3b53ff;
    --azul-bright: #5b73ff;
    --azul-light: #eef0ff;
    --slate: #4a4f7a;
    --slate-light: #f8f9ff;
    --dark: #1a1f4b;
    --gray: #6b7294;
    --border: #e0e2f0;
    --white: #ffffff;
    --emerald: #059669;
    --violet: #7c3aed;
    --amber: #d97706;
    --light: #f1f5f9;
    --gray-light: #e2e8f0;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --success: #059669;
    --success-bg: #ecfdf5;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --purple: #7c3aed;
    --primary: #3b53ff;
    --primary-bg: #eef0ff;
    --primary-light: #a5b4ff;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 3px rgba(26,31,75,.04);
    --shadow: 0 4px 16px rgba(59,83,255,.08);
    --shadow-md: 0 8px 32px rgba(59,83,255,.12);
    --transition: .25s ease;
}

/* ── Bootstrap 5 Variable Overrides ── */
:root {
    --bs-primary: #3b53ff;
    --bs-primary-rgb: 59, 83, 255;
    --bs-primary-bg-subtle: #eef0ff;
    --bs-primary-border-subtle: #a5b4ff;
    --bs-link-color: #3b53ff;
    --bs-link-hover-color: #5b73ff;
    --bs-link-color-rgb: 59, 83, 255;
    --bs-link-hover-color-rgb: 91, 115, 255;
    --bs-focus-ring-color: rgba(59, 83, 255, 0.25);
}

/* ── Bootstrap Component Overrides ── */
.btn-primary {
    --bs-btn-bg: #3b53ff;
    --bs-btn-border-color: #3b53ff;
    --bs-btn-hover-bg: #5b73ff;
    --bs-btn-hover-border-color: #5b73ff;
    --bs-btn-focus-shadow-rgb: 59, 83, 255;
    --bs-btn-active-bg: #3b53ff;
    --bs-btn-active-border-color: #3b53ff;
    --bs-btn-disabled-bg: #3b53ff;
    --bs-btn-disabled-border-color: #3b53ff;
}
.table-primary {
    --bs-table-color: var(--dark);
    --bs-table-bg: var(--primary-bg);
    --bs-table-border-color: var(--azul-light);
    --bs-table-striped-bg: #d6dcff;
    --bs-table-striped-color: var(--dark);
    --bs-table-active-bg: var(--azul-light);
    --bs-table-active-color: var(--dark);
    --bs-table-hover-bg: #e8ebff;
    --bs-table-hover-color: var(--dark);
}
.alert-primary {
    --bs-alert-color: var(--primary);
    --bs-alert-bg: var(--primary-bg);
    --bs-alert-border-color: var(--azul-light);
}
.list-group-item-primary {
    --bs-list-group-color: var(--primary);
    --bs-list-group-bg: var(--primary-bg);
    --bs-list-group-border-color: var(--azul-light);
}
.progress-bar { --bs-progress-bar-bg: var(--primary); }
.page-item.active .page-link {
    --bs-pagination-active-bg: var(--primary);
    --bs-pagination-active-border-color: var(--primary);
    --bs-pagination-active-color: #fff;
}
.nav-pills .nav-link.active { --bs-nav-pills-link-active-bg: var(--primary); }
.form-check-input:checked {
    --bs-form-check-input-checked-bg-color: var(--primary);
    --bs-form-check-input-checked-border-color: var(--primary);
}
.accordion-button:not(.collapsed) {
    --bs-accordion-active-color: var(--primary);
    --bs-accordion-active-bg: var(--primary-bg);
}

/* ── Bootstrap Class Overrides ── */
.btn-primary, .btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background-color: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #fff !important;
}
.btn-primary:hover {
    background-color: var(--azul-bright) !important;
    border-color: var(--azul-bright) !important;
}
.bg-primary { background-color: var(--primary) !important; }
.text-primary { color: var(--primary) !important; }
.border-primary { border-color: var(--primary) !important; }
.btn-outline-primary, .btn-outline-primary:hover, .btn-outline-primary:focus, .btn-outline-primary:active {
    color: var(--primary) !important;
    border-color: var(--primary) !important;
}
.btn-outline-primary:hover, .btn-outline-primary:active {
    background-color: var(--primary) !important;
    color: #fff !important;
}
.alert-primary { background-color: var(--primary-bg) !important; border-color: var(--azul-light) !important; color: var(--primary) !important; }
.table-primary, .table-primary > td, .table-primary > th { background-color: var(--primary-bg) !important; border-color: var(--azul-light) !important; }
.progress-bar { background-color: var(--primary) !important; }
.page-item.active .page-link { background-color: var(--primary) !important; border-color: var(--primary) !important; color: #fff !important; }
.list-group-item-primary { background-color: var(--primary-bg) !important; color: var(--primary) !important; }
.link-primary, a.link-primary { color: var(--primary) !important; }
.link-primary:hover, a.link-primary:hover { color: var(--azul-bright) !important; }
.dropdown-item.active, .dropdown-item:active { background-color: var(--primary) !important; }
.nav-pills .nav-link.active { background-color: var(--primary) !important; }
.form-check-input:checked { background-color: var(--primary) !important; border-color: var(--primary) !important; }
.accordion-button:not(.collapsed) { color: var(--primary) !important; background-color: var(--primary-bg) !important; box-shadow: inset 0 -1px 0 var(--azul-light) !important; }

/* ── Reset & Base ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--dark);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', 'Inter', sans-serif;
    font-weight: 700;
}

/* ── Navbar Global ── */
.tcf-nav {
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .3s;
}
.tcf-nav.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,.06); }
.tcf-brand {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--azul) !important;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: .45rem;
}
.tcf-brand i { font-size: 1.3rem; color: var(--azul-bright); }
.nav-link {
    font-weight: 500;
    color: var(--slate) !important;
    font-size: .88rem;
    transition: color .2s;
}
.nav-link:hover { color: var(--azul-bright) !important; }
.btn-nav-outline {
    padding: .45rem 1.1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: .85rem;
    border: 1.5px solid var(--border);
    color: var(--slate) !important;
    transition: all .2s;
}
.btn-nav-outline:hover { border-color: var(--azul-bright); color: var(--azul-bright) !important; }
.btn-nav-solid {
    padding: .45rem 1.1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: .85rem;
    background: var(--azul-bright);
    color: #fff !important;
    border: none;
    transition: all .2s;
}
.btn-nav-solid:hover { background: var(--azul); color: #fff !important; }

/* ── Botones Globales ── */
.btn-azul-solid {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    background: var(--azul-bright);
    color: #fff;
    padding: .65rem 1.3rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: .88rem;
    border: none;
    transition: all .2s;
    text-decoration: none;
}
.btn-azul-solid:hover { background: var(--azul); color: #fff; transform: translateY(-1px); }
.btn-azul-outline {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    background: transparent;
    color: var(--azul-bright);
    padding: .6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: .88rem;
    border: 2px solid var(--azul-bright);
    transition: all .2s;
    text-decoration: none;
}
.btn-azul-outline:hover { background: var(--azul-bright); color: #fff; }

.btn-main {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: .5rem 1.15rem;
    transition: all var(--transition);
    text-decoration: none;
    font-size: .85rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-main:hover { background: var(--azul); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost {
    background: var(--white);
    color: var(--gray);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-weight: 500;
    padding: .5rem 1rem;
    transition: all var(--transition);
    text-decoration: none;
    font-size: .85rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-ghost:hover { background: var(--slate-light); color: var(--dark); border-color: #cbd5e1; }
.btn-ghost-danger {
    background: var(--white);
    color: var(--danger);
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    font-weight: 500;
    padding: .5rem 1rem;
    transition: all var(--transition);
    text-decoration: none;
    font-size: .85rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-ghost-danger:hover { background: var(--danger-bg); color: var(--danger); }

/* ── Secciones ── */
.section-badge {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    background: var(--azul-light);
    color: var(--azul);
    padding: .3rem .85rem;
    border-radius: 2rem;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.section-heading {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -.02em;
    line-height: 1.2;
}
.section-sub {
    color: var(--gray);
    font-size: 1.02rem;
    max-width: 640px;
    line-height: 1.7;
}
@media(max-width:768px) { .section-heading { font-size: 1.55rem; } }

/* ── Cards Generales ── */
.eco-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all .35s;
    height: 100%;
}
.eco-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(59,83,255,.10);
    border-color: var(--azul-light);
}
.eco-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: #fff;
    margin-bottom: 1rem;
}
.eco-card h5 { font-size: 1rem; font-weight: 700; margin-bottom: .4rem; color: var(--dark); }
.eco-card p { font-size: .87rem; color: var(--gray); line-height: 1.6; margin: 0; }

/* ── Stat Cards ── */
.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: .85rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid rgba(0,0,0,.04);
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.stat-icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.stat-card h3 { font-weight: 800; font-size: 1.5rem; margin: 0; line-height: 1; letter-spacing: -.02em; }
.stat-card small { color: var(--gray); font-size: .78rem; font-weight: 500; }

/* ── Sidebar (panels) ── */
.sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--white);
    border-right: 1px solid var(--border);
    padding: 1.5rem 1.25rem;
    z-index: 1050;
    transition: transform .3s ease;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}
.sidebar-brand {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 1.75rem;
    text-decoration: none;
    letter-spacing: -.02em;
}
.sidebar-brand i { font-size: 1.1rem; color: var(--primary-light); }
.sidebar-user {
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius);
    color: #fff;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: .75rem;
}
.user-avatar {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255,255,255,.18);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}
.user-info { min-width: 0; }
.user-name { display: block; font-weight: 700; font-size: .88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { display: block; font-size: .72rem; opacity: .75; margin-top: 1px; }
.sidebar-label {
    font-size: .65rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--gray);
    font-weight: 600;
    padding: 0 12px;
    margin: 1rem 0 .5rem;
}
.sidebar-nav { list-style: none; padding: 0; flex: 1; }
.sidebar-nav .nav-item {
    display: flex;
    align-items: center;
    padding: 9px 12px;
    color: var(--gray);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    margin-bottom: 2px;
    transition: all var(--transition);
    font-size: .85rem;
}
.sidebar-nav .nav-item:hover { background: var(--primary-bg); color: var(--primary); }
.sidebar-nav .nav-item.active { background: var(--primary-bg); color: var(--primary); font-weight: 600; }
.sidebar-nav .nav-item.active i { color: var(--primary); }
.sidebar-nav .nav-item i { margin-right: 10px; width: 18px; text-align: center; font-size: .85rem; }
.sidebar-footer { padding-top: .75rem; border-top: 1px solid var(--border); margin-top: auto; }
.sidebar-footer .nav-item { color: var(--danger); }
.sidebar-footer .nav-item:hover { background: var(--danger-bg); }

/* ── Main Content (panels) ── */
.main-content {
    margin-left: 260px;
    padding: 2rem 2.5rem;
    min-height: 100vh;
    transition: margin .3s ease;
    max-width: 1200px;
}

/* ── Page Header ── */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.75rem;
}
.page-header h1 { font-weight: 800; font-size: 1.6rem; letter-spacing: -.03em; margin: 0; }
.page-header p { color: var(--gray); font-size: .85rem; margin: .15rem 0 0; }
.header-actions { display: flex; gap: .5rem; align-items: center; }

/* ── Alert Banner ── */
.alert-banner {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    border: 1px solid;
}
.alert-banner-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}
.alert-banner-body { flex: 1; min-width: 0; }
.alert-banner-body strong { display: block; font-size: .88rem; margin-bottom: 1px; }
.alert-banner-body p { font-size: .82rem; margin: 0; opacity: .85; }
.alert-banner-warning { background: var(--warning-bg); border-color: #fde68a; color: #92400e; }
.alert-banner-warning .alert-banner-icon { background: #fde68a; color: #d97706; }
.alert-banner-info { background: var(--primary-bg); border-color: var(--azul-light); color: var(--primary); }
.alert-banner-info .alert-banner-icon { background: var(--azul-light); color: var(--primary); }
.alert-banner .btn-banner {
    padding: .4rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: .8rem;
    text-decoration: none;
    white-space: nowrap;
    border: none;
    cursor: pointer;
}
.alert-banner-warning .btn-banner { background: #fbbf24; color: #92400e; }
.alert-banner-warning .btn-banner:hover { background: #f59e0b; }
.alert-banner-info .btn-banner { background: var(--primary); color: #fff; }
.alert-banner-info .btn-banner:hover { background: var(--azul); }

/* ── Clase Card ── */
.clase-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid rgba(0,0,0,.04);
}
.clase-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.clase-card .top-bar { height: 3px; }
.clase-card .body { padding: 1.15rem; }
.clase-card h6 { font-weight: 700; margin-bottom: .35rem; font-size: .9rem; }
.clase-card .meta { font-size: .78rem; color: var(--gray); }
.codigo-display {
    font-family: 'Courier New', monospace;
    letter-spacing: 3px;
    font-weight: 700;
    font-size: .95rem;
    color: var(--primary);
    user-select: all;
    cursor: pointer;
}

/* ── Table card ── */
.table-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid rgba(0,0,0,.04);
}

/* ── Empty state ── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--gray); }
.empty-state i { font-size: 2.5rem; margin-bottom: .75rem; display: block; opacity: .3; }
.empty-state h5 { font-weight: 700; margin-bottom: .25rem; }

/* ── Btn Icon ── */
.btn-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    color: #fff;
    transition: all var(--transition);
    font-size: .8rem;
}
.btn-icon:hover { transform: translateY(-1px); box-shadow: var(--shadow); color: #fff; }

/* ── Accordion ── */
.accordion-toggle {
    outline: none;
    width: 100%;
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .75rem 1rem;
    background: var(--white);
    border: 1px solid rgba(0,0,0,.06);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
}
.accordion-toggle:hover { box-shadow: var(--shadow); }
.accordion-toggle:not(.collapsed) { box-shadow: var(--shadow); background: var(--primary-bg); }
.accordion-toggle:not(.collapsed) .fa-chevron-down { transform: rotate(180deg); }

/* ── Footer ── */
.tcf-footer { background: var(--dark); color: rgba(255,255,255,.6); }
.tcf-footer a { color: rgba(255,255,255,.6); text-decoration: none; transition: color .2s; }
.tcf-footer a:hover { color: var(--azul-light); }
.tcf-footer h6 { color: #fff; font-weight: 700; font-size: .82rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: .85rem; }

/* ── Mobile Toggle ── */
.mobile-toggle {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1100;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    box-shadow: 0 4px 16px rgba(59,83,255,.35);
    font-size: 1.1rem;
    cursor: pointer;
}

/* ── Utilities ── */
.text-azul { color: var(--azul-bright); }

/* ── Responsive ── */
@media(max-width:992px) {
    .mobile-toggle { display: block; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.active { transform: translateX(0); }
    .main-content { margin-left: 0; padding: 1.5rem 1rem; }
    .mobile-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,.4);
        z-index: 1040;
        backdrop-filter: blur(4px);
    }
    .stat-card { padding: 1rem; }
    .stat-card h3 { font-size: 1.3rem; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .header-actions { width: 100%; }
    .header-actions .btn-main { flex: 1; justify-content: center; }
}
@media(max-width:768px) {
    .section-heading { font-size: 1.45rem; }
    .section-sub { font-size: .95rem; }
    .eco-card { padding: 1.25rem; }
    .stat-card { padding: .85rem; }
    .btn-main { padding: .55rem 1rem; font-size: .82rem; }
    .btn-ghost { padding: .55rem .9rem; font-size: .82rem; }
}