/* =====================================================================
   TEACHERS-SPOT — theme
   Layered on top of Bootstrap 5.3. Bootstrap's own variables are
   overridden here rather than forked, so upgrading Bootstrap stays easy.

   Palette rationale (spec §10): soft, low-glare tones for long study
   sessions — a calm teal primary, sage support, warm off-white paper
   instead of glaring pure white, and text kept above 7:1 contrast.
   ===================================================================== */

:root {
    /* Brand */
    --ts-teal-900: #16403c;
    --ts-teal-800: #1f5f59;
    --ts-teal-700: #2f7d75;   /* primary */
    --ts-teal-600: #3d938a;
    --ts-teal-300: #a8cfc9;
    --ts-teal-100: #e3f0ed;

    --ts-sage-700: #4e7d52;
    --ts-sage-100: #e8f1e6;

    --ts-clay-700: #b06a3b;
    --ts-clay-100: #f7ebe0;

    --ts-plum-700: #7d5490;

    /* Warm neutrals — never pure white */
    --ts-paper:      #f7f5f0;
    --ts-surface:    #fffdf9;
    --ts-surface-2:  #f1eee7;
    --ts-border:     #e4dfd4;
    --ts-border-soft:#eeeae1;

    --ts-ink:        #232a2e;
    --ts-ink-soft:   #4c565c;
    --ts-ink-muted:  #78838a;

    --ts-shadow-sm: 0 1px 2px rgba(35, 42, 46, .06);
    --ts-shadow:    0 2px 10px rgba(35, 42, 46, .07);
    --ts-shadow-lg: 0 10px 34px rgba(35, 42, 46, .10);

    --ts-radius:    14px;
    --ts-radius-sm: 10px;

    /* Bootstrap overrides.
       Bootstrap 5.3 resolves several of these through *-rgb companions
       (links and body text among them), so both forms are set. */
    --bs-primary:        #2f7d75;
    --bs-primary-rgb:    47, 125, 117;
    --bs-secondary:      #78838a;
    --bs-success:        #4e7d52;
    --bs-success-rgb:    78, 125, 82;
    --bs-warning:        #c08a2e;
    --bs-warning-rgb:    192, 138, 46;
    --bs-danger:         #b0483f;
    --bs-danger-rgb:     176, 72, 63;
    --bs-info:           #3d7fb8;
    --bs-info-rgb:       61, 127, 184;

    --bs-body-bg:        var(--ts-paper);
    --bs-body-bg-rgb:    247, 245, 240;
    --bs-body-color:     var(--ts-ink);
    --bs-body-color-rgb: 35, 42, 46;
    --bs-emphasis-color: var(--ts-ink);
    --bs-heading-color:  var(--ts-ink);
    --bs-secondary-color:var(--ts-ink-muted);
    --bs-secondary-bg:   var(--ts-surface-2);
    --bs-tertiary-bg:    var(--ts-surface-2);

    --bs-border-color:   var(--ts-border);
    --bs-border-radius:  var(--ts-radius-sm);

    --bs-link-color:           #26685f;
    --bs-link-color-rgb:       38, 104, 95;
    --bs-link-hover-color:     #16403c;
    --bs-link-hover-color-rgb: 22, 64, 60;

    --bs-font-sans-serif: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                          "Helvetica Neue", Arial, sans-serif;
    --bs-body-font-size: 1rem;
    --bs-body-line-height: 1.6;
}

/* ---------- Dark mode ------------------------------------------------ */
[data-bs-theme="dark"] {
    --ts-paper:      #14181a;
    --ts-surface:    #1c2225;
    --ts-surface-2:  #232a2e;
    --ts-border:     #2e373b;
    --ts-border-soft:#28312f;

    --ts-ink:        #e8ebe9;
    --ts-ink-soft:   #b6c0c1;
    --ts-ink-muted:  #8b9799;

    --ts-teal-100:   #1c3330;
    --ts-teal-300:   #4d9a90;
    --ts-sage-100:   #1e2a20;
    --ts-clay-100:   #2d231a;

    --bs-body-bg:        var(--ts-paper);
    --bs-body-bg-rgb:    20, 24, 26;
    --bs-body-color:     var(--ts-ink);
    --bs-body-color-rgb: 232, 235, 233;
    --bs-emphasis-color: var(--ts-ink);
    --bs-heading-color:  var(--ts-ink);
    --bs-secondary-color:var(--ts-ink-muted);
    --bs-secondary-bg:   var(--ts-surface-2);
    --bs-tertiary-bg:    var(--ts-surface-2);
    --bs-border-color:   var(--ts-border);

    --bs-link-color:           #6fb8ad;
    --bs-link-color-rgb:       111, 184, 173;
    --bs-link-hover-color:     #96d0c7;
    --bs-link-hover-color-rgb: 150, 208, 199;

    --bs-primary:      #3d938a;
    --bs-primary-rgb:  61, 147, 138;

    --ts-shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --ts-shadow:    0 2px 12px rgba(0, 0, 0, .45);
    --ts-shadow-lg: 0 12px 36px rgba(0, 0, 0, .5);
}

/* ---------- Base ----------------------------------------------------- */

html { scroll-behavior: smooth; }

body {
    background-color: var(--ts-paper);
    color: var(--ts-ink);
    font-family: var(--bs-font-sans-serif);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main { flex: 1 0 auto; }

/* Include the .h1–.h6 utility classes: they carry higher specificity than the
   bare elements, so a heading marked <h2 class="h6"> must be listed too. */
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--ts-ink);
}
h1 { font-size: clamp(1.6rem, 4vw, 2.25rem); }
h2 { font-size: clamp(1.35rem, 3vw, 1.7rem); }
h3 { font-size: 1.2rem; }

a { text-decoration: none; }
a:hover { text-decoration: underline; }

.text-muted, .text-body-secondary { color: var(--ts-ink-muted) !important; }
.text-soft { color: var(--ts-ink-soft); }

::selection { background: var(--ts-teal-300); color: var(--ts-teal-900); }

:focus-visible {
    outline: 3px solid var(--ts-teal-600);
    outline-offset: 2px;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 2000;
    background: var(--ts-teal-700);
    color: #fff;
    padding: .6rem 1rem;
    border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Surfaces ------------------------------------------------- */

.ts-card {
    background: var(--ts-surface);
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius);
    box-shadow: var(--ts-shadow-sm);
    transition: box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}

a.ts-card, .ts-card-hover { display: block; color: inherit; }
a.ts-card:hover, .ts-card-hover:hover {
    box-shadow: var(--ts-shadow);
    border-color: var(--ts-teal-300);
    transform: translateY(-2px);
    text-decoration: none;
}

.ts-panel {
    background: var(--ts-surface);
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius);
    padding: 1.25rem;
}

.ts-soft { background: var(--ts-surface-2); }

.card { --bs-card-bg: var(--ts-surface); --bs-card-border-color: var(--ts-border); }

/* ---------- Navbar --------------------------------------------------- */

.ts-navbar {
    background: var(--ts-surface);
    border-bottom: 1px solid var(--ts-border);
    position: sticky;
    top: 0;
    z-index: 1030;
}

.ts-brand {
    font-weight: 800;
    letter-spacing: -.02em;
    color: var(--ts-teal-800);
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    white-space: nowrap;
    flex: 0 0 auto;
}
.ts-brand:hover { text-decoration: none; color: var(--ts-teal-900); }
[data-bs-theme="dark"] .ts-brand { color: var(--ts-teal-300); }

.ts-brand-mark {
    width: 30px; height: 30px;
    border-radius: 9px;
    background: linear-gradient(135deg, var(--ts-teal-700), var(--ts-sage-700));
    color: #fff;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: .95rem;
}

.ts-navbar .nav-link {
    color: var(--ts-ink-soft);
    font-weight: 500;
    border-radius: 8px;
    padding: .45rem .7rem;
}
.ts-navbar .nav-link:hover { color: var(--ts-teal-800); background: var(--ts-teal-100); text-decoration: none; }
.ts-navbar .nav-link.active { color: var(--ts-teal-800); background: var(--ts-teal-100); }
[data-bs-theme="dark"] .ts-navbar .nav-link:hover,
[data-bs-theme="dark"] .ts-navbar .nav-link.active { color: var(--ts-teal-300); }

.ts-search { min-width: 0; max-width: 34rem; }
.ts-search input { background: var(--ts-surface-2); border-color: var(--ts-border); }
.ts-search .input-group-text { background: var(--ts-surface-2); }

/* Keep the account controls from being squeezed by the search field. */
.ts-navbar .dropdown > .btn { white-space: nowrap; }

/* ---------- Buttons -------------------------------------------------- */

.btn { font-weight: 600; border-radius: 10px; background-image: none; }
.btn-lg { border-radius: 12px; }

/* Pill navigation (catalog tabs) */
.nav-pills {
    --bs-nav-pills-link-active-bg: var(--ts-teal-700);
    --bs-nav-pills-link-active-color: #fff;
    --bs-nav-pills-border-radius: 10px;
}
.nav-pills .nav-link { color: var(--ts-ink-soft); font-weight: 600; }
.nav-pills .nav-link:not(.active):hover { background: var(--ts-teal-100); color: var(--ts-teal-800); }

.btn-primary {
    --bs-btn-bg: var(--ts-teal-700);
    --bs-btn-border-color: var(--ts-teal-700);
    --bs-btn-hover-bg: var(--ts-teal-800);
    --bs-btn-hover-border-color: var(--ts-teal-800);
    --bs-btn-active-bg: var(--ts-teal-900);
    --bs-btn-disabled-bg: var(--ts-teal-600);
    --bs-btn-disabled-border-color: var(--ts-teal-600);
}

.btn-outline-primary {
    --bs-btn-color: var(--ts-teal-800);
    --bs-btn-border-color: var(--ts-teal-300);
    --bs-btn-hover-bg: var(--ts-teal-700);
    --bs-btn-hover-border-color: var(--ts-teal-700);
}
[data-bs-theme="dark"] .btn-outline-primary { --bs-btn-color: var(--ts-teal-300); }

.btn-soft {
    background: var(--ts-surface-2);
    border: 1px solid var(--ts-border);
    color: var(--ts-ink-soft);
}
.btn-soft:hover { background: var(--ts-teal-100); color: var(--ts-teal-800); border-color: var(--ts-teal-300); }

/* ---------- Badges & pills ------------------------------------------- */

.ts-pill {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    font-size: .74rem;
    font-weight: 600;
    padding: .22rem .6rem;
    border-radius: 999px;
    background: var(--ts-surface-2);
    color: var(--ts-ink-soft);
    border: 1px solid var(--ts-border-soft);
    line-height: 1.4;
}
.ts-pill-teal   { background: var(--ts-teal-100); color: var(--ts-teal-800); border-color: transparent; }
.ts-pill-sage   { background: var(--ts-sage-100); color: var(--ts-sage-700); border-color: transparent; }
.ts-pill-clay   { background: var(--ts-clay-100); color: var(--ts-clay-700); border-color: transparent; }
[data-bs-theme="dark"] .ts-pill-teal { color: var(--ts-teal-300); }
[data-bs-theme="dark"] .ts-pill-sage { color: #8fc194; }
[data-bs-theme="dark"] .ts-pill-clay { color: #d9a172; }

/* Premium marker — deliberately quiet, per spec §10 */
.ts-lock {
    display: inline-flex; align-items: center; gap: .3rem;
    font-size: .72rem; font-weight: 600;
    color: var(--ts-clay-700);
    background: var(--ts-clay-100);
    border-radius: 999px;
    padding: .2rem .55rem;
}
[data-bs-theme="dark"] .ts-lock { color: #d9a172; }

/* ---------- Thumbnails & media --------------------------------------- */

.ts-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--ts-surface-2);
    border-radius: var(--ts-radius) var(--ts-radius) 0 0;
    overflow: hidden;
}
.ts-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.ts-thumb-duration {
    position: absolute; right: .5rem; bottom: .5rem;
    background: rgba(20, 24, 26, .82);
    color: #fff;
    font-size: .72rem; font-weight: 600;
    padding: .12rem .4rem; border-radius: 6px;
}

.ts-thumb-play {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; transition: opacity .18s ease;
    background: rgba(22, 64, 60, .32);
    color: #fff; font-size: 2.4rem;
}
.ts-card-hover:hover .ts-thumb-play, a.ts-card:hover .ts-thumb-play { opacity: 1; }

.ts-progress-strip {
    position: absolute; left: 0; right: 0; bottom: 0;
    height: 4px; background: rgba(255, 255, 255, .35);
}
.ts-progress-strip > span { display: block; height: 100%; background: var(--ts-teal-600); }

.ts-player-wrap {
    background: #0f1417;
    border-radius: var(--ts-radius);
    overflow: hidden;
    position: relative;
}
.ts-player-wrap video { width: 100%; display: block; max-height: 72vh; background: #0f1417; }

.ts-player-overlay {
    position: absolute; inset: 0;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: .75rem; text-align: center; padding: 2rem;
    background: linear-gradient(160deg, rgba(22, 64, 60, .94), rgba(15, 20, 23, .96));
    color: #fff;
}

/* ---------- Avatars -------------------------------------------------- */

.ts-avatar {
    width: 40px; height: 40px; border-radius: 50%;
    object-fit: cover;
    background: var(--ts-teal-100);
    color: var(--ts-teal-800);
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: .85rem;
    flex: 0 0 auto;
    border: 1px solid var(--ts-border-soft);
}
.ts-avatar-sm { width: 30px; height: 30px; font-size: .72rem; }
.ts-avatar-lg { width: 72px; height: 72px; font-size: 1.4rem; }
.ts-avatar-xl { width: 104px; height: 104px; font-size: 2rem; }

/* ---------- Stat tiles ----------------------------------------------- */

.ts-stat {
    background: var(--ts-surface);
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius);
    padding: 1rem 1.1rem;
    height: 100%;
}
.ts-stat-value {
    font-size: clamp(1.3rem, 1.1rem + 0.6vw, 1.65rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -.02em;
    overflow-wrap: anywhere;
}
.ts-stat-label {
    font-size: .74rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: .06em; color: var(--ts-ink-muted); margin-top: .3rem;
}
.ts-stat-icon {
    width: 34px; height: 34px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--ts-teal-100); color: var(--ts-teal-800); font-size: 1rem;
}
[data-bs-theme="dark"] .ts-stat-icon { color: var(--ts-teal-300); }

/* ---------- Dashboard shell ------------------------------------------ */

.ts-shell { display: flex; gap: 1.5rem; align-items: flex-start; }

.ts-sidebar {
    width: 250px;
    flex: 0 0 250px;
    position: sticky;
    top: 84px;
    background: var(--ts-surface);
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius);
    padding: .75rem;
}

.ts-sidebar .nav-link {
    color: var(--ts-ink-soft);
    border-radius: 9px;
    padding: .55rem .7rem;
    font-weight: 500;
    display: flex; align-items: center; gap: .6rem;
}
.ts-sidebar .nav-link:hover { background: var(--ts-surface-2); color: var(--ts-ink); text-decoration: none; }
.ts-sidebar .nav-link.active { background: var(--ts-teal-100); color: var(--ts-teal-800); font-weight: 600; }
[data-bs-theme="dark"] .ts-sidebar .nav-link.active { color: var(--ts-teal-300); }

.ts-sidebar-heading {
    font-size: .68rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .08em; color: var(--ts-ink-muted);
    padding: .85rem .7rem .35rem;
}

.ts-content { flex: 1 1 auto; min-width: 0; }

@media (max-width: 991.98px) {
    .ts-shell { flex-direction: column; }
    .ts-sidebar { width: 100%; flex: 1 1 auto; position: static; }
    .ts-sidebar .nav { flex-direction: row; flex-wrap: wrap; }
    .ts-sidebar .nav-link { padding: .45rem .65rem; font-size: .92rem; }
    .ts-sidebar-heading { display: none; }
}

/* ---------- Page header ---------------------------------------------- */

.ts-page-head {
    display: flex; flex-wrap: wrap; gap: 1rem;
    align-items: flex-end; justify-content: space-between;
    margin-bottom: 1.25rem;
}
.ts-page-head p { margin: .3rem 0 0; color: var(--ts-ink-muted); }

/* ---------- Hero ----------------------------------------------------- */

.ts-hero {
    background:
        radial-gradient(1100px 340px at 12% -10%, var(--ts-teal-100), transparent 62%),
        radial-gradient(900px 320px at 88% 0%, var(--ts-sage-100), transparent 60%);
    border-bottom: 1px solid var(--ts-border-soft);
    padding: clamp(2.25rem, 6vw, 4rem) 0 clamp(2rem, 5vw, 3.25rem);
}
.ts-hero h1 { font-size: clamp(1.9rem, 5vw, 3rem); line-height: 1.12; }
.ts-hero .lead { color: var(--ts-ink-soft); max-width: 40rem; }

/* ---------- Tables --------------------------------------------------- */

.ts-table {
    --bs-table-bg: var(--ts-surface);
    --bs-table-border-color: var(--ts-border-soft);
    --bs-table-color: var(--ts-ink);
    margin-bottom: 0;
}
.ts-table thead th {
    font-size: .72rem; text-transform: uppercase; letter-spacing: .06em;
    color: var(--ts-ink-muted); font-weight: 700;
    background: var(--ts-surface-2);
    border-bottom: 1px solid var(--ts-border);
    white-space: nowrap;
}
.ts-table td, .ts-table th { padding: .7rem .85rem; vertical-align: middle; }
.ts-table-wrap {
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius);
    overflow: hidden;
    background: var(--ts-surface);
}
.ts-table-scroll { overflow-x: auto; }

/* ---------- Forms ---------------------------------------------------- */

.form-control, .form-select {
    background-color: var(--ts-surface);
    border-color: var(--ts-border);
    color: var(--ts-ink);
    border-radius: 10px;
    padding: .6rem .8rem;
}
.form-control:focus, .form-select:focus {
    border-color: var(--ts-teal-600);
    box-shadow: 0 0 0 .2rem rgba(var(--bs-primary-rgb), .18);
    background-color: var(--ts-surface);
    color: var(--ts-ink);
}
.form-label { font-weight: 600; font-size: .88rem; margin-bottom: .3rem; color: var(--ts-ink-soft); }
.form-text { color: var(--ts-ink-muted); font-size: .82rem; }
.form-check-input:checked { background-color: var(--ts-teal-700); border-color: var(--ts-teal-700); }

.ts-form-card {
    background: var(--ts-surface);
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius);
    padding: clamp(1.25rem, 3vw, 2rem);
}

.ts-auth-wrap { max-width: 30rem; margin: 0 auto; }

/* Numbered step badge in long forms */
.ts-step {
    display: inline-flex; align-items: center; justify-content: center;
    width: 1.5rem; height: 1.5rem; margin-right: .45rem;
    border-radius: 50%;
    background: var(--ts-teal-700); color: #fff;
    font-size: .78rem; font-weight: 700;
}

/* Live character counter beside a textarea */
.ts-counter { float: right; font-variant-numeric: tabular-nums; color: var(--ts-ink-muted); }
.ts-counter.is-short { color: var(--ts-clay-700); }

/* Letter preview (recruitment handover) */
.ts-letter {
    background: #fff;
    color: #1d2b2a;
    border: 1px solid var(--ts-border);
    border-radius: var(--ts-radius-sm);
    padding: clamp(1.5rem, 4vw, 3rem);
    max-width: 52rem;
    margin-inline: auto;
    line-height: 1.55;
}
.ts-letter-head { display: flex; gap: 1rem; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; }
.ts-letter-rule { border: 0; border-top: 2px solid var(--ts-teal-700); margin: .35rem 0 .1rem; }
.ts-letter-rule-thin { border: 0; border-top: 1px solid var(--ts-border); margin: 0 0 1.5rem; }
.ts-letter-quote {
    border-left: 3px solid var(--ts-teal-300);
    padding-left: 1rem; margin: .5rem 0 1.25rem;
    font-style: italic; white-space: pre-line;
}
.ts-letter-notice {
    background: var(--ts-surface-2);
    border-radius: var(--ts-radius-sm);
    padding: .85rem 1rem; font-size: .85rem;
}
.ts-letter-sign { margin-top: 2.5rem; }
.ts-letter-sign-line { border-top: 1px solid #1d2b2a; width: 15rem; margin-bottom: .35rem; }
@media print {
    .ts-letter { border: 0; padding: 0; max-width: none; }
    .ts-letter-notice { background: #f2f5f4; }
}

/* File input drop styling */
.ts-file-field {
    border: 1.5px dashed var(--ts-border);
    border-radius: var(--ts-radius-sm);
    padding: 1rem;
    background: var(--ts-surface-2);
}
.ts-file-field:hover { border-color: var(--ts-teal-300); }

/* ---------- Alerts & flash ------------------------------------------- */

.ts-flash-stack {
    position: fixed;
    top: 78px; right: 1rem;
    z-index: 1080;
    width: min(24rem, calc(100vw - 2rem));
    display: flex; flex-direction: column; gap: .6rem;
}
.ts-flash {
    border-radius: var(--ts-radius-sm);
    box-shadow: var(--ts-shadow-lg);
    border: 1px solid var(--ts-border);
    padding: .8rem 1rem;
    background: var(--ts-surface);
    display: flex; gap: .6rem; align-items: flex-start;
    animation: ts-slide-in .25s ease;
}
@keyframes ts-slide-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
.ts-flash-success { border-left: 4px solid var(--ts-sage-700); }
.ts-flash-danger  { border-left: 4px solid #b0483f; }
.ts-flash-warning { border-left: 4px solid #c08a2e; }
.ts-flash-info    { border-left: 4px solid var(--ts-teal-700); }

/* ---------- Notifications -------------------------------------------- */

.ts-notif-dot {
    position: absolute; top: 2px; right: 2px;
    min-width: 17px; height: 17px; padding: 0 4px;
    border-radius: 999px; background: #b0483f; color: #fff;
    font-size: .64rem; font-weight: 700;
    display: inline-flex; align-items: center; justify-content: center;
}

.ts-notif-item {
    display: flex; gap: .8rem; padding: .85rem 1rem;
    border-bottom: 1px solid var(--ts-border-soft);
    color: inherit;
}
.ts-notif-item:hover { background: var(--ts-surface-2); text-decoration: none; }
.ts-notif-item.unread { background: var(--ts-teal-100); }
[data-bs-theme="dark"] .ts-notif-item.unread { background: var(--ts-teal-100); }

/* ---------- Comments ------------------------------------------------- */

.ts-comment { display: flex; gap: .8rem; padding: .9rem 0; border-bottom: 1px solid var(--ts-border-soft); }
.ts-comment:last-child { border-bottom: 0; }
.ts-comment-body { background: var(--ts-surface-2); border-radius: 12px; padding: .65rem .85rem; }
.ts-comment-reply { margin-left: 2.6rem; }
.ts-comment-teacher .ts-comment-body { background: var(--ts-teal-100); }

/* ---------- Timeline ------------------------------------------------- */

.ts-timeline { position: relative; padding-left: 1.6rem; }
.ts-timeline::before {
    content: ""; position: absolute; left: .42rem; top: .35rem; bottom: .35rem;
    width: 2px; background: var(--ts-border);
}
.ts-timeline-item { position: relative; padding: .45rem 0 .75rem; }
.ts-timeline-item::before {
    content: ""; position: absolute; left: -1.35rem; top: .8rem;
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--ts-teal-600); border: 2px solid var(--ts-surface);
}

/* ---------- Charts (pure CSS/SVG, no library) ------------------------ */

.ts-sparkline { width: 100%; height: 64px; display: block; }
.ts-sparkline path.area { fill: rgba(var(--bs-primary-rgb), .14); }
.ts-sparkline path.line { fill: none; stroke: var(--ts-teal-700); stroke-width: 2; stroke-linejoin: round; }
[data-bs-theme="dark"] .ts-sparkline path.line { stroke: var(--ts-teal-300); }

.ts-bar-row { display: grid; grid-template-columns: 9.5rem 1fr 3.5rem; gap: .65rem; align-items: center; margin-bottom: .45rem; }
.ts-bar-track { background: var(--ts-surface-2); border-radius: 999px; height: 10px; overflow: hidden; }
.ts-bar-fill { height: 100%; border-radius: 999px; background: var(--ts-teal-600); }
.ts-bar-label { font-size: .85rem; color: var(--ts-ink-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ts-bar-value { font-size: .82rem; font-weight: 700; text-align: right; color: var(--ts-ink-soft); }

/* ---------- Empty states --------------------------------------------- */

.ts-empty {
    text-align: center;
    padding: clamp(2rem, 6vw, 3.5rem) 1rem;
    color: var(--ts-ink-muted);
}
.ts-empty i { font-size: 2.2rem; color: var(--ts-teal-300); display: block; margin-bottom: .6rem; }

/* ---------- Subject chips -------------------------------------------- */

.ts-subject-tile {
    display: flex; align-items: center; gap: .7rem;
    padding: .85rem 1rem;
    border-radius: var(--ts-radius);
    background: var(--ts-surface);
    border: 1px solid var(--ts-border);
    color: inherit;
    transition: transform .16s ease, box-shadow .16s ease;
}
.ts-subject-tile:hover { transform: translateY(-2px); box-shadow: var(--ts-shadow); text-decoration: none; }
.ts-subject-dot { width: 34px; height: 34px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; color: #fff; }

/* ---------- Offline / connectivity ----------------------------------- */

.ts-offline-banner {
    display: none;
    background: var(--ts-clay-100);
    color: var(--ts-clay-700);
    text-align: center;
    font-size: .87rem;
    font-weight: 600;
    padding: .45rem 1rem;
}
body.is-offline .ts-offline-banner { display: block; }

/* ---------- Utilities ------------------------------------------------ */

.ts-line-clamp-2 {
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.ts-line-clamp-3 {
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
    overflow: hidden;
}

.ts-divider { height: 1px; background: var(--ts-border-soft); margin: 1.25rem 0; }

.ts-sticky-actions {
    position: sticky; bottom: 0;
    background: linear-gradient(to top, var(--ts-paper) 62%, transparent);
    padding: 1rem 0 .5rem;
}

/* ---------- Print ---------------------------------------------------- */

@media print {
    .ts-navbar, .ts-sidebar, footer, .no-print, .ts-flash-stack, .btn { display: none !important; }
    body { background: #fff; color: #000; }
    .ts-card, .ts-panel, .ts-table-wrap, .ts-stat { border-color: #ccc !important; box-shadow: none !important; }
    a { color: #000 !important; text-decoration: none !important; }
    .ts-print-only { display: block !important; }
    @page { margin: 14mm; }
}

.ts-print-only { display: none; }

/* ---------- Reduced motion ------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
}