/* ==========================================================================
   Skill Me Up — STMS theme
   Bootstrap 5.3 overrides + application shell. No preprocessor, no build step.
   Brand: Skill Blue #1835C7 · Rise Green #16AC32
   ========================================================================== */

:root {
    /* Brand ramp */
    --smu-blue:        #1835C7;
    --smu-blue-700:    #12269180;
    --smu-blue-600:    #142CA6;
    --smu-blue-100:    #DDE3FF;
    --smu-blue-050:    #EEF1FF;
    --smu-green:       #16AC32;
    --smu-green-600:   #128B29;
    --smu-green-050:   #E9F8EC;

    /* Neutrals — biased a few degrees toward Skill Blue so greys feel chosen */
    --smu-ink:         #151A2C;
    --smu-ink-2:       #4A5169;
    --smu-ink-3:       #767D95;
    --smu-line:        #E3E6F0;
    --smu-line-soft:   #EFF1F7;
    --smu-surface:     #FFFFFF;
    --smu-ground:      #F5F6FB;

    --smu-sidebar-w:   264px;
    --smu-radius:      .5rem;

    /* Bootstrap semantic overrides */
    --bs-primary:            #1835C7;
    --bs-primary-rgb:        24, 53, 199;
    --bs-success:            #16AC32;
    --bs-success-rgb:        22, 172, 50;
    --bs-link-color:         #1835C7;
    --bs-link-color-rgb:     24, 53, 199;
    --bs-link-hover-color:   #142CA6;
    --bs-body-color:         #151A2C;
    --bs-body-bg:            #F5F6FB;
    --bs-border-color:       #E3E6F0;
    --bs-font-sans-serif:    "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

body {
    background: var(--smu-ground);
    color: var(--smu-ink);
    font-size: .9375rem;
}

/* --------------------------------------------------------------- buttons -- */
.btn { --bs-btn-font-weight: 500; --bs-btn-padding-y: .4rem; --bs-btn-padding-x: .9rem; }

.btn-primary {
    --bs-btn-bg: var(--smu-blue);
    --bs-btn-border-color: var(--smu-blue);
    --bs-btn-hover-bg: var(--smu-blue-600);
    --bs-btn-hover-border-color: var(--smu-blue-600);
    --bs-btn-active-bg: var(--smu-blue-600);
    --bs-btn-active-border-color: var(--smu-blue-600);
    --bs-btn-disabled-bg: var(--smu-blue);
    --bs-btn-disabled-border-color: var(--smu-blue);
}

.btn-outline-primary {
    --bs-btn-color: var(--smu-blue);
    --bs-btn-border-color: var(--smu-blue);
    --bs-btn-hover-bg: var(--smu-blue);
    --bs-btn-hover-border-color: var(--smu-blue);
    --bs-btn-active-bg: var(--smu-blue-600);
    --bs-btn-active-border-color: var(--smu-blue-600);
}

.btn-success {
    --bs-btn-bg: var(--smu-green);
    --bs-btn-border-color: var(--smu-green);
    --bs-btn-hover-bg: var(--smu-green-600);
    --bs-btn-hover-border-color: var(--smu-green-600);
    --bs-btn-active-bg: var(--smu-green-600);
    --bs-btn-active-border-color: var(--smu-green-600);
}

.btn-light {
    --bs-btn-bg: #FFFFFF;
    --bs-btn-border-color: var(--smu-line);
    --bs-btn-hover-bg: var(--smu-ground);
    --bs-btn-hover-border-color: #D6DAE8;
}

.btn:focus-visible, .form-control:focus, .form-select:focus, .form-check-input:focus {
    box-shadow: 0 0 0 .2rem rgba(24, 53, 199, .18);
    border-color: #9AA8EA;
}

.form-check-input:checked { background-color: var(--smu-blue); border-color: var(--smu-blue); }

/* ----------------------------------------------------------------- shell -- */
.smu-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--smu-sidebar-w);
    background: #0F1730;
    color: #C7CDE4;
    display: flex;
    flex-direction: column;
    z-index: 1040;
}

.smu-sidebar__brand {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: 1.1rem 1.15rem;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    color: #fff;
    text-decoration: none;
}

.smu-sidebar__brand img { height: 26px; width: auto; display: block; }

.smu-sidebar__nav {
    flex: 1;
    overflow-y: auto;
    padding: .75rem .7rem 1.5rem;
}

.smu-sidebar__heading {
    font-size: .6875rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: #6E779C;
    padding: 1rem .55rem .35rem;
    font-weight: 600;
}

.smu-nav-link {
    display: flex;
    align-items: center;
    gap: .7rem;
    padding: .55rem .6rem;
    border-radius: var(--smu-radius);
    color: #C7CDE4;
    text-decoration: none;
    font-size: .875rem;
    line-height: 1.3;
    margin-bottom: 2px;
    transition: background-color .12s ease, color .12s ease;
}

.smu-nav-link i { font-size: 1.05rem; width: 1.15rem; text-align: center; flex: none; }
.smu-nav-link:hover { background: rgba(255, 255, 255, .07); color: #fff; }

.smu-nav-link.active {
    background: var(--smu-blue);
    color: #fff;
    font-weight: 500;
    box-shadow: inset 3px 0 0 var(--smu-green);
}

.smu-nav-link .badge { margin-left: auto; }

.smu-sidebar__footer {
    padding: .75rem 1rem;
    border-top: 1px solid rgba(255, 255, 255, .08);
    font-size: .75rem;
    color: #6E779C;
}

.smu-main { margin-left: var(--smu-sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }

.smu-topbar {
    background: var(--smu-surface);
    border-bottom: 1px solid var(--smu-line);
    padding: .6rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.smu-content { padding: 1.5rem; flex: 1; }

@media (max-width: 991.98px) {
    .smu-sidebar { transform: translateX(-100%); transition: transform .2s ease; }
    .smu-sidebar.is-open { transform: none; box-shadow: 0 0 40px rgba(0, 0, 0, .4); }
    .smu-main { margin-left: 0; }
    .smu-content { padding: 1rem; }
    .smu-backdrop { position: fixed; inset: 0; background: rgba(15, 23, 48, .5); z-index: 1035; }
}

/* ------------------------------------------------------------ page header -- */
.smu-page-header { display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-start; justify-content: space-between; margin-bottom: 1.25rem; }
.smu-page-header h1 { font-size: 1.4rem; font-weight: 600; margin: 0; letter-spacing: -.01em; }
.smu-page-header .smu-sub { color: var(--smu-ink-3); font-size: .875rem; margin: .2rem 0 0; }

.breadcrumb { --bs-breadcrumb-font-size: .8125rem; --bs-breadcrumb-divider-color: var(--smu-ink-3); margin-bottom: .35rem; }
.breadcrumb a { color: var(--smu-ink-3); text-decoration: none; }
.breadcrumb a:hover { color: var(--smu-blue); }

/* ------------------------------------------------------------------ cards -- */
.card {
    --bs-card-border-color: var(--smu-line);
    --bs-card-border-radius: var(--smu-radius);
    --bs-card-cap-bg: #FFFFFF;
    box-shadow: 0 1px 2px rgba(21, 26, 44, .04);
}

.card-header {
    border-bottom-color: var(--smu-line);
    padding: .85rem 1.15rem;
    font-weight: 600;
    font-size: .9375rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
}

/* -------------------------------------------------------------- stat card -- */
.smu-stat {
    background: var(--smu-surface);
    border: 1px solid var(--smu-line);
    border-radius: var(--smu-radius);
    padding: 1rem 1.1rem;
    height: 100%;
    display: flex;
    align-items: flex-start;
    gap: .9rem;
    box-shadow: 0 1px 2px rgba(21, 26, 44, .04);
}

.smu-stat__icon {
    width: 42px; height: 42px;
    border-radius: 10px;
    display: grid; place-items: center;
    font-size: 1.25rem;
    flex: none;
    background: var(--smu-blue-050);
    color: var(--smu-blue);
}

.smu-stat__icon.is-green { background: var(--smu-green-050); color: var(--smu-green-600); }
.smu-stat__icon.is-amber { background: #FDF2E0; color: #A9660B; }
.smu-stat__icon.is-red   { background: #FCECEC; color: #B92B2B; }
.smu-stat__icon.is-slate { background: #ECEEF6; color: var(--smu-ink-2); }

.smu-stat__label { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--smu-ink-3); font-weight: 600; margin: 0; }
.smu-stat__value { font-size: 1.5rem; font-weight: 600; line-height: 1.15; margin: .15rem 0 0; letter-spacing: -.02em; }
.smu-stat__meta  { font-size: .8125rem; color: var(--smu-ink-3); margin: .15rem 0 0; }

/* ----------------------------------------------------------------- tables -- */
.table {
    --bs-table-border-color: var(--smu-line-soft);
    --bs-table-hover-bg: #F8F9FD;
    margin-bottom: 0;
    font-size: .875rem;
}

.table > thead th {
    background: #FAFBFE;
    border-bottom: 1px solid var(--smu-line);
    font-size: .6875rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--smu-ink-3);
    font-weight: 700;
    white-space: nowrap;
    padding: .7rem .9rem;
}

.table > tbody td { padding: .7rem .9rem; vertical-align: middle; }
.table-actions { white-space: nowrap; text-align: right; }
.table-actions .btn { --bs-btn-padding-y: .2rem; --bs-btn-padding-x: .45rem; font-size: .875rem; }

/* ----------------------------------------------------------------- badges -- */
.badge { font-weight: 600; letter-spacing: .01em; padding: .35em .6em; border-radius: 4px; font-size: .6875rem; text-transform: uppercase; }
.smu-badge-blue   { background: var(--smu-blue-050);  color: var(--smu-blue); }
.smu-badge-green  { background: var(--smu-green-050); color: var(--smu-green-600); }
.smu-badge-amber  { background: #FDF2E0; color: #A9660B; }
.smu-badge-red    { background: #FCECEC; color: #B92B2B; }
.smu-badge-slate  { background: #ECEEF6; color: var(--smu-ink-2); }

/* ---------------------------------------------------------------- avatars -- */
.smu-avatar {
    width: 34px; height: 34px;
    border-radius: 50%;
    object-fit: cover;
    display: grid; place-items: center;
    background: var(--smu-blue-050);
    color: var(--smu-blue);
    font-size: .75rem;
    font-weight: 700;
    flex: none;
}

.smu-avatar--lg { width: 72px; height: 72px; font-size: 1.35rem; }

/* ---------------------------------------------------------- filter toolbar -- */
.smu-filters {
    background: var(--smu-surface);
    border: 1px solid var(--smu-line);
    border-radius: var(--smu-radius);
    padding: .85rem 1rem;
    margin-bottom: 1rem;
}

.smu-filters .form-control, .smu-filters .form-select { font-size: .875rem; }

/* ------------------------------------------------------------ empty state -- */
.smu-empty { text-align: center; padding: 3rem 1.5rem; color: var(--smu-ink-3); }
.smu-empty i { font-size: 2.5rem; color: #C3C9DC; display: block; margin-bottom: .6rem; }
.smu-empty h3 { font-size: 1rem; font-weight: 600; color: var(--smu-ink-2); margin-bottom: .25rem; }
.smu-empty p { font-size: .875rem; margin-bottom: 1rem; }

/* --------------------------------------------------------------- progress -- */
.progress { --bs-progress-height: .5rem; --bs-progress-bg: #E7EAF4; --bs-progress-bar-bg: var(--smu-blue); border-radius: 99px; }
.progress-bar.is-green { background-color: var(--smu-green); }
.progress-bar.is-amber { background-color: #E09A2B; }
.progress-bar.is-red   { background-color: #C93A3A; }

/* ------------------------------------------------------------------- auth -- */
.smu-auth {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr;
    background: var(--smu-ground);
}

@media (min-width: 992px) { .smu-auth { grid-template-columns: 1.05fr 1fr; } }

.smu-auth__aside {
    display: none;
    background: linear-gradient(150deg, #0F1730 0%, var(--smu-blue) 78%, #1B47D8 100%);
    color: #fff;
    padding: 3rem;
    flex-direction: column;
    justify-content: space-between;
}

@media (min-width: 992px) { .smu-auth__aside { display: flex; } }

.smu-auth__aside h2 { font-size: 1.85rem; font-weight: 600; letter-spacing: -.02em; max-width: 16ch; line-height: 1.25; }
.smu-auth__aside p { color: rgba(255, 255, 255, .75); max-width: 42ch; }
.smu-auth__flow { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 1.5rem; }
.smu-auth__flow span { font-size: .6875rem; padding: .25rem .55rem; border-radius: 4px; background: rgba(255, 255, 255, .12); color: rgba(255, 255, 255, .92); }
.smu-auth__panel { display: grid; place-items: center; padding: 2rem 1.25rem; }
.smu-auth__card { width: 100%; max-width: 420px; }

/* ----------------------------------------------------------------- toasts -- */
.toast-container { z-index: 1090; }

/* ------------------------------------------------------------ permissions -- */
.smu-perm-group { border: 1px solid var(--smu-line); border-radius: var(--smu-radius); overflow: hidden; }
.smu-perm-group__head { background: #FAFBFE; padding: .6rem .9rem; border-bottom: 1px solid var(--smu-line); display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
.smu-perm-group__head strong { font-size: .8125rem; text-transform: capitalize; }
.smu-perm-group__body { padding: .7rem .9rem; display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: .35rem .9rem; }
.smu-perm-group__body .form-check { margin: 0; }
.smu-perm-group__body .form-check-label { font-size: .8125rem; }

/* ------------------------------------------------------ syllabus builder -- */
.smu-syllabus { display: flex; flex-direction: column; gap: .75rem; }

.smu-module {
    border: 1px solid var(--smu-line);
    border-radius: var(--smu-radius);
    background: var(--smu-surface);
    box-shadow: 0 1px 2px rgba(21, 26, 44, .04);
}

.smu-module__head {
    display: flex;
    align-items: flex-start;
    gap: .65rem;
    padding: .8rem 1rem;
    border-bottom: 1px solid var(--smu-line-soft);
}

.smu-module__body { padding: .5rem .75rem .75rem 2.6rem; }

.smu-topic {
    border: 1px solid var(--smu-line-soft);
    border-radius: 6px;
    background: #FCFCFE;
    margin-bottom: .4rem;
}

.smu-topic__head { display: flex; align-items: flex-start; gap: .6rem; padding: .55rem .7rem; }
.smu-topic__body { padding: 0 .7rem .6rem 2.2rem; }

.smu-lesson {
    display: flex;
    align-items: center;
    gap: .55rem;
    padding: .35rem .6rem;
    border-left: 2px solid var(--smu-line);
    font-size: .8125rem;
    background: var(--smu-surface);
    border-radius: 0 4px 4px 0;
    margin-bottom: 2px;
}

.smu-seq {
    flex: none;
    min-width: 22px; height: 22px;
    border-radius: 4px;
    display: grid; place-items: center;
    font-size: .6875rem;
    font-weight: 700;
    background: var(--smu-blue-050);
    color: var(--smu-blue);
    font-variant-numeric: tabular-nums;
}

.smu-seq--topic { background: var(--smu-surface-3, #ECEEF6); color: var(--smu-ink-2); }

[data-drag-handle] {
    cursor: grab;
    color: #B7BDD2;
    flex: none;
    padding: .1rem .15rem;
    line-height: 1;
    touch-action: none;
}
[data-drag-handle]:hover { color: var(--smu-blue); }
[data-drag-handle]:active { cursor: grabbing; }

.is-dragging { opacity: .45; outline: 2px dashed var(--smu-blue); outline-offset: 2px; }

@media (prefers-reduced-motion: no-preference) {
    [data-sortable-item] { transition: transform .12s ease; }
}

/* -------------------------------------------------------------- utilities -- */
.smu-mono { font-family: "Consolas", "SFMono-Regular", ui-monospace, monospace; font-size: .8125rem; }
.smu-muted { color: var(--smu-ink-3); }
.smu-divider { height: 1px; background: var(--smu-line); margin: 1.25rem 0; }
.smu-json { background: #0F1730; color: #C7CDE4; border-radius: 6px; padding: .8rem 1rem; font-size: .75rem; overflow-x: auto; margin: 0; }
.smu-required::after { content: " *"; color: #C93A3A; }

@media print {
    .smu-sidebar, .smu-topbar, .smu-no-print { display: none !important; }
    .smu-main { margin-left: 0; }
    body { background: #fff; }
}

/* ---------------------------------------------------------------- charts */
/* Chart.js needs a positioned parent with a real height to size its canvas
   against; without one it grows on every resize. */
.smu-chart {
    position: relative;
    width: 100%;
}

.smu-chart canvas {
    display: block;
}

/* ------------------------------------------------------------------ brand */
/* The logo is a two-colour wordmark on transparency, and both the sidebar and
   the sign-in panel are near-black. Rather than recolour or invert the logo —
   which would throw away the green chevron — it is given a white plate to sit
   on, so it always appears exactly as supplied. */
.smu-logo-plate {
    display: inline-flex;
    align-items: center;
    background: #fff;
    border-radius: 8px;
    padding: .45rem .6rem;
    line-height: 0;
}

.smu-sidebar__brand .smu-logo-plate img { height: 26px; width: auto; display: block; }
.smu-auth__aside .smu-logo-plate img { height: 34px; width: auto; display: block; }