/* ==========================================================================
   PROFESIO — Design proposal system (proto.css)
   Two themes (dark navy + light) and the shared component vocabulary used by
   every proposal screen. Screens compose these classes; they never hardcode
   colours, so the dark/light toggle works everywhere.

   Class catalogue (prefix .pro-):
   Layout shells .... pro-app pro-toolbar pro-shell pro-sidebar pro-rail
                      pro-topbar pro-subnav pro-main pro-container pro-pagehead
   Surfaces ......... pro-card pro-tile pro-stat-grid pro-section pro-empty
   Buttons .......... pro-btn (+ -primary -soft -ghost -outline -danger -icon -sm -lg)
   Bits ............. pro-chip pro-badge(-*) pro-pill(-*) pro-progress pro-avatar(-*)
                      pro-rating pro-search pro-filter pro-divider pro-tabs pro-seg
   Data ............. pro-table(-wrap)
   Course ........... pro-course-card pro-course-row pro-course-thumb pro-course-meta
   Curriculum ....... pro-accordion pro-acc-* pro-lesson  /  pro-builder pro-block
   Player ........... pro-player pro-stage pro-playlist(-item)
   Quiz ............. pro-quiz-q pro-option pro-score-ring
   Gallery .......... pro-hero pro-area-card pro-variant-btn
   ========================================================================== */

/* ---------- Theme tokens ---------------------------------------------------*/
:root {
  --pro-font: "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;
  --pro-font-head: "Heebo", var(--pro-font);
  --pro-toolbar-h: 52px;
  --pro-radius: 16px;
  --pro-radius-sm: 11px;
  --pro-radius-lg: 22px;
  --pro-sidebar-w: 264px;
  --pro-rail-w: 76px;
  --pro-rail-w-open: 248px;
}

[data-bs-theme="dark"] {
  color-scheme: dark;
  --pro-bg: #0b1220;
  --pro-bg-grad:
    radial-gradient(circle at 0% 0%, rgba(56,189,248,.12), transparent 38%),
    radial-gradient(circle at 100% 8%, rgba(37,99,235,.16), transparent 36%),
    var(--pro-bg);
  --pro-surface: #0f172a;
  --pro-surface-2: #131f36;
  --pro-surface-3: #1a2942;
  --pro-elevated: rgba(255,255,255,.03);
  --pro-border: rgba(148,163,184,.16);
  --pro-border-strong: rgba(148,163,184,.30);
  --pro-text: #dbe4f2;
  --pro-heading: #f8fafc;
  --pro-muted: #93a3bd;
  --pro-faint: #64748b;
  --pro-primary: #2563eb;
  --pro-primary-2: #3b82f6;
  --pro-primary-ink: #ffffff;
  --pro-primary-soft: rgba(59,130,246,.16);
  --pro-primary-line: rgba(96,165,250,.34);
  --pro-accent: #38bdf8;
  --pro-success: #34d399;  --pro-success-soft: rgba(52,211,153,.16);
  --pro-warning: #fbbf24;  --pro-warning-soft: rgba(251,191,36,.16);
  --pro-danger:  #f87171;  --pro-danger-soft:  rgba(248,113,113,.16);
  --pro-info:    #60a5fa;  --pro-info-soft:    rgba(96,165,250,.16);
  --pro-shadow: 0 1.4rem 2.8rem rgba(2,8,23,.40);
  --pro-shadow-sm: 0 .6rem 1.4rem rgba(2,8,23,.30);
  --pro-grad-btn: linear-gradient(135deg,#2563eb,#3b82f6);
  --pro-grad-btn-hover: linear-gradient(135deg,#1d4ed8,#2563eb);
  /* keep Bootstrap components on-theme */
  --bs-body-bg: var(--pro-bg);
  --bs-body-color: var(--pro-text);
  --bs-border-color: var(--pro-border);
  --bs-primary: var(--pro-primary);
  --bs-secondary-bg: var(--pro-surface-2);
  --bs-tertiary-bg: var(--pro-surface);
  --bs-emphasis-color: var(--pro-heading);
}

[data-bs-theme="light"] {
  color-scheme: light;
  --pro-bg: #f4f6fb;
  --pro-bg-grad:
    radial-gradient(circle at 0% 0%, rgba(37,99,235,.06), transparent 36%),
    radial-gradient(circle at 100% 6%, rgba(56,189,248,.07), transparent 34%),
    var(--pro-bg);
  --pro-surface: #ffffff;
  --pro-surface-2: #ffffff;
  --pro-surface-3: #eef3fb;
  --pro-elevated: #f8fafd;
  --pro-border: #e5e9f2;
  --pro-border-strong: #d3dae8;
  --pro-text: #38445c;
  --pro-heading: #0f172a;
  --pro-muted: #64748b;
  --pro-faint: #94a3b8;
  --pro-primary: #2563eb;
  --pro-primary-2: #3b82f6;
  --pro-primary-ink: #ffffff;
  --pro-primary-soft: rgba(37,99,235,.09);
  --pro-primary-line: rgba(37,99,235,.22);
  --pro-accent: #0ea5e9;
  --pro-success: #16a34a;  --pro-success-soft: rgba(22,163,74,.12);
  --pro-warning: #d97706;  --pro-warning-soft: rgba(217,119,6,.13);
  --pro-danger:  #dc2626;  --pro-danger-soft:  rgba(220,38,38,.10);
  --pro-info:    #2563eb;  --pro-info-soft:    rgba(37,99,235,.10);
  --pro-shadow: 0 1.1rem 2.4rem rgba(15,23,42,.08);
  --pro-shadow-sm: 0 .5rem 1.2rem rgba(15,23,42,.06);
  --pro-grad-btn: linear-gradient(135deg,#2563eb,#3b82f6);
  --pro-grad-btn-hover: linear-gradient(135deg,#1d4ed8,#2563eb);
  --bs-body-bg: var(--pro-bg);
  --bs-body-color: var(--pro-text);
  --bs-border-color: var(--pro-border);
  --bs-primary: var(--pro-primary);
  --bs-secondary-bg: var(--pro-surface-3);
  --bs-tertiary-bg: var(--pro-elevated);
  --bs-emphasis-color: var(--pro-heading);
}

/* ---------- Base -----------------------------------------------------------*/
* { -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--pro-font);
  background: var(--pro-bg-grad) fixed;
  color: var(--pro-text);
  min-height: 100vh;
}
h1,h2,h3,h4,h5,h6,.pro-h { font-family: var(--pro-font-head); color: var(--pro-heading); letter-spacing: -.01em; }
a { color: var(--pro-primary); text-decoration: none; }
a:hover { color: var(--pro-primary-2); }

/* ---------- Themed scrollbars (app blue, not gray) ------------------------ */
* { scrollbar-width: thin; scrollbar-color: color-mix(in srgb, var(--pro-primary) 80%, transparent) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--pro-primary) 78%, transparent);
  border-radius: 999px; border: 2px solid transparent; background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: var(--pro-primary-2); background-clip: padding-box; }
*::-webkit-scrollbar-corner { background: transparent; }
.text-muted, .pro-muted { color: var(--pro-muted) !important; }
.pro-faint { color: var(--pro-faint) !important; }
.pro-heading { color: var(--pro-heading) !important; }
.pro-accent { color: var(--pro-accent) !important; }
::selection { background: var(--pro-primary-soft); }
.pro-gradient-text {
  background: linear-gradient(120deg,var(--pro-heading),var(--pro-accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ---------- Proto toolbar (gallery chrome on every screen) -----------------*/
.pro-toolbar {
  position: sticky; top: 0; z-index: 1080;
  height: var(--pro-toolbar-h);
  display: flex; align-items: center; gap: .75rem;
  padding: 0 clamp(.75rem, 2vw, 1.25rem);
  background: color-mix(in srgb, var(--pro-surface) 86%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--pro-border);
}
.pro-toolbar .pro-tb-back {
  display: inline-flex; align-items: center; gap: .45rem;
  font-weight: 700; font-size: .86rem; color: var(--pro-heading);
  padding: .35rem .7rem; border-radius: 999px; border: 1px solid var(--pro-border);
  background: var(--pro-elevated);
}
.pro-toolbar .pro-tb-back:hover { border-color: var(--pro-primary-line); color: var(--pro-primary-2); }
.pro-toolbar .pro-tb-title { font-weight: 800; color: var(--pro-heading); font-family: var(--pro-font-head); }
.pro-toolbar .pro-tb-tag { font-size: .72rem; color: var(--pro-muted); font-weight: 600; }
.pro-tb-variants { display: inline-flex; gap: .25rem; padding: .2rem; border-radius: 999px;
  background: var(--pro-elevated); border: 1px solid var(--pro-border); }
.pro-tb-variants a {
  font-size: .76rem; font-weight: 800; letter-spacing: .02em; color: var(--pro-muted);
  padding: .28rem .62rem; border-radius: 999px; line-height: 1;
}
.pro-tb-variants a.active { background: var(--pro-grad-btn); color: #fff; box-shadow: var(--pro-shadow-sm); }
.pro-tb-variants a:not(.active):hover { color: var(--pro-heading); }

/* theme toggle — sliding switch: the knob glides left↔right on theme change */
.pro-theme-toggle {
  position: relative;
  display: inline-flex; align-items: center; cursor: pointer;
  width: 104px; height: 36px; padding: 0; border-radius: 999px;
  background: var(--pro-elevated); border: 1px solid var(--pro-border);
  color: var(--pro-heading); font-weight: 700; font-size: .8rem;
  transition: background .25s ease, border-color .25s ease;
  -webkit-tap-highlight-color: transparent;
}
.pro-theme-toggle:hover { border-color: var(--pro-primary-line); }
/* the label sits opposite the knob */
.pro-theme-toggle > .pro-tt-dark,
.pro-theme-toggle > .pro-tt-light {
  position: absolute; top: 0; height: 100%;
  display: inline-flex; align-items: center; line-height: 1;
  pointer-events: none;
}
[data-bs-theme="dark"] .pro-theme-toggle > .pro-tt-dark { left: .85rem; }
[data-bs-theme="light"] .pro-theme-toggle > .pro-tt-light { right: .85rem; }
/* the sliding knob */
.pro-theme-toggle .pro-tt-knob {
  position: absolute; top: 50%; left: 4px;
  width: 28px; height: 28px; border-radius: 999px;
  display: grid; place-items: center;
  background: var(--pro-grad-btn); color: #fff; font-size: .9rem;
  transform: translateY(-50%);
  box-shadow: 0 2px 6px rgba(0, 0, 0, .25);
  transition: left .3s cubic-bezier(.34, 1.56, .64, 1);
}
[data-bs-theme="light"] .pro-theme-toggle .pro-tt-knob { left: 4px; }
[data-bs-theme="dark"] .pro-theme-toggle .pro-tt-knob { left: calc(100% - 28px - 4px); }
[data-bs-theme="dark"] .pro-tt-light { display: none; }
[data-bs-theme="light"] .pro-tt-dark { display: none; }

/* ---------- App shells -----------------------------------------------------*/
.pro-app { min-height: calc(100vh - var(--pro-toolbar-h)); }
.pro-shell { display: flex; align-items: flex-start; }

/* V1 sidebar */
.pro-sidebar {
  position: sticky; top: var(--pro-toolbar-h);
  align-self: flex-start;
  width: var(--pro-sidebar-w); flex: 0 0 var(--pro-sidebar-w);
  height: calc(100vh - var(--pro-toolbar-h));
  overflow-y: auto;
  background: var(--pro-surface);
  border-right: 1px solid var(--pro-border);
  padding: 1.1rem .8rem;
}
.pro-brand { display: flex; align-items: center; gap: .6rem; padding: .3rem .5rem 1rem; }
.pro-brand-logo { width: 34px; height: 34px; border-radius: 10px; background: var(--pro-grad-btn);
  display: grid; place-items: center; color: #fff; font-weight: 800; font-family: var(--pro-font-head); }
.pro-brand-name { font-family: var(--pro-font-head); font-weight: 800; color: var(--pro-heading); font-size: 1.1rem; }
.pro-nav-section { font-size: .68rem; text-transform: uppercase; letter-spacing: .12em;
  color: var(--pro-faint); font-weight: 800; padding: 1rem .8rem .4rem; }
.pro-nav-link {
  display: flex; align-items: center; gap: .7rem;
  padding: .62rem .8rem; border-radius: 12px; margin-bottom: 2px;
  color: var(--pro-muted); font-weight: 600; font-size: .92rem;
}
.pro-nav-link i { width: 1.2rem; text-align: center; font-size: 1.02rem; }
.pro-nav-link .pro-nav-badge { margin-left: auto; }
.pro-nav-link:hover { background: var(--pro-elevated); color: var(--pro-heading); }
.pro-nav-link.active { background: var(--pro-primary-soft); color: var(--pro-heading); box-shadow: inset 2px 0 0 var(--pro-primary); }
[data-bs-theme="dark"] .pro-nav-link.active { color: #fff; }

/* V3 slim icon rail (expands on hover, desktop) */
.pro-rail {
  position: sticky; top: var(--pro-toolbar-h); align-self: flex-start;
  width: var(--pro-rail-w); flex: 0 0 var(--pro-rail-w);
  height: calc(100vh - var(--pro-toolbar-h)); overflow: hidden;
  background: var(--pro-surface); border-right: 1px solid var(--pro-border);
  padding: 1rem .6rem; transition: width .22s ease, flex-basis .22s ease;
}
.pro-rail .pro-rail-label, .pro-rail .pro-brand-name { opacity: 0; white-space: nowrap; transition: opacity .15s ease; }
.pro-rail:hover { width: var(--pro-rail-w-open); flex-basis: var(--pro-rail-w-open); box-shadow: var(--pro-shadow); }
.pro-rail:hover .pro-rail-label, .pro-rail:hover .pro-brand-name { opacity: 1; }
.pro-rail-link {
  display: flex; align-items: center; gap: .85rem; padding: .7rem .7rem; margin-bottom: 4px;
  border-radius: 12px; color: var(--pro-muted); font-weight: 600;
}
.pro-rail-link i { width: 1.4rem; text-align: center; font-size: 1.15rem; flex: none; }
.pro-rail-link:hover { background: var(--pro-elevated); color: var(--pro-heading); }
.pro-rail-link.active { background: var(--pro-primary-soft); color: var(--pro-heading); }

/* V2 top app bar */
.pro-topbar {
  position: sticky; top: var(--pro-toolbar-h); z-index: 1050;
  display: flex; align-items: center; gap: 1rem;
  padding: .7rem clamp(1rem,3vw,2rem);
  background: var(--pro-surface); border-bottom: 1px solid var(--pro-border);
}
.pro-topnav { display: flex; gap: .2rem; }
.pro-topnav a {
  padding: .5rem .85rem; border-radius: 10px; color: var(--pro-muted); font-weight: 600; font-size: .9rem;
}
.pro-topnav a:hover { color: var(--pro-heading); background: var(--pro-elevated); }
.pro-topnav a.active { color: var(--pro-heading); background: var(--pro-primary-soft); }
.pro-subnav {
  position: sticky; top: calc(var(--pro-toolbar-h) + 57px); z-index: 1040;
  display: flex; gap: .3rem; align-items: center; overflow-x: auto;
  padding: .55rem clamp(1rem,3vw,2rem);
  background: color-mix(in srgb, var(--pro-surface) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--pro-border);
}
.pro-subnav a { white-space: nowrap; padding: .42rem .8rem; border-radius: 999px; font-weight: 700;
  font-size: .85rem; color: var(--pro-muted); }
.pro-subnav a:hover { color: var(--pro-heading); background: var(--pro-elevated); }
.pro-subnav a.active { color: #fff; background: var(--pro-grad-btn); }
[data-bs-theme="light"] .pro-subnav a.active { color: #fff; }

/* main content */
.pro-main { flex: 1 1 auto; min-width: 0; padding: clamp(1.1rem,2.4vw,2rem); }
.pro-container { max-width: 1240px; margin: 0 auto; }
.pro-container-wide { max-width: 1420px; margin: 0 auto; }
.pro-pagehead { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 1rem; margin-bottom: 1.5rem; }
.pro-pagehead .pro-ph-title { font-size: clamp(1.4rem,2.4vw,1.9rem); font-weight: 800; margin: 0; }
.pro-pagehead .pro-ph-sub { color: var(--pro-muted); margin: .25rem 0 0; }
.pro-pagehead .pro-ph-actions { margin-left: auto; display: flex; gap: .5rem; flex-wrap: wrap; }
.pro-breadcrumb { font-size: .82rem; color: var(--pro-faint); font-weight: 600; margin-bottom: .35rem; }
.pro-breadcrumb a { color: var(--pro-muted); }

/* ---------- Cards & sections ----------------------------------------------*/
.pro-card {
  background: var(--pro-surface); border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius); box-shadow: var(--pro-shadow-sm);
}
.pro-card-pad { padding: clamp(1rem,2vw,1.5rem); }
.pro-card-head { display: flex; align-items: center; gap: .75rem; padding: 1.1rem 1.25rem; border-bottom: 1px solid var(--pro-border); }
.pro-card-head .pro-ch-title { font-weight: 800; font-size: 1.02rem; margin: 0; }
.pro-card-head .pro-ch-actions { margin-left: auto; display: flex; gap: .4rem; }
.pro-card-body { padding: 1.25rem; }
.pro-section { margin-bottom: clamp(1.25rem,3vw,2rem); }
.pro-section-title { font-size: 1.1rem; font-weight: 800; margin-bottom: 1rem; display: flex; align-items: center; gap: .5rem; }

/* stat tiles */
.pro-stat-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(190px,1fr)); }
.pro-tile {
  background: var(--pro-surface); border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius); padding: 1.15rem 1.2rem; box-shadow: var(--pro-shadow-sm);
  position: relative; overflow: hidden;
}
.pro-tile .pro-tile-ico {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  font-size: 1.15rem; margin-bottom: .85rem;
  background: var(--pro-primary-soft); color: var(--pro-primary-2);
}
.pro-tile .pro-tile-val { font-family: var(--pro-font-head); font-size: 1.7rem; font-weight: 800; color: var(--pro-heading); line-height: 1; }
.pro-tile .pro-tile-lbl { color: var(--pro-muted); font-size: .85rem; margin-top: .35rem; }
.pro-tile .pro-tile-delta { font-size: .76rem; font-weight: 700; margin-top: .5rem; display: inline-flex; align-items: center; gap: .25rem; }
.pro-delta-up { color: var(--pro-success); } .pro-delta-down { color: var(--pro-danger); }
.pro-tile-ico.is-success { background: var(--pro-success-soft); color: var(--pro-success); }
.pro-tile-ico.is-warning { background: var(--pro-warning-soft); color: var(--pro-warning); }
.pro-tile-ico.is-danger  { background: var(--pro-danger-soft);  color: var(--pro-danger); }
.pro-tile-ico.is-accent  { background: rgba(56,189,248,.16);    color: var(--pro-accent); }

/* ---------- Buttons (keep current pill / gradient style) -------------------*/
.pro-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--pro-font); font-weight: 700; font-size: .9rem; letter-spacing: .01em;
  padding: .6rem 1.1rem; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: all .18s ease; white-space: nowrap; line-height: 1.2;
}
.pro-btn-sm { padding: .42rem .8rem; font-size: .82rem; }
.pro-btn-lg { padding: .8rem 1.5rem; font-size: 1rem; }
.pro-btn-primary { background: var(--pro-grad-btn); color: #fff; border-color: var(--pro-primary-line);
  box-shadow: 0 .7rem 1.5rem color-mix(in srgb, var(--pro-primary) 28%, transparent); }
.pro-btn-primary:hover { background: var(--pro-grad-btn-hover); color: #fff; transform: translateY(-1px); }
.pro-btn-soft { background: var(--pro-primary-soft); color: var(--pro-primary-2); border-color: transparent; }
.pro-btn-soft:hover { background: var(--pro-primary); color: #fff; }
.pro-btn-ghost { background: var(--pro-elevated); color: var(--pro-heading); border-color: var(--pro-border); }
.pro-btn-ghost:hover { border-color: var(--pro-primary-line); color: var(--pro-primary-2); }
.pro-btn-outline { background: transparent; color: var(--pro-heading); border-color: var(--pro-border-strong); }
.pro-btn-outline:hover { border-color: var(--pro-primary); color: var(--pro-primary-2); }
.pro-btn-danger { background: var(--pro-danger-soft); color: var(--pro-danger); }
.pro-btn-danger:hover { background: var(--pro-danger); color: #fff; }
.pro-btn-success { background: linear-gradient(135deg,#16a34a,#22c55e); color: #fff; border-color: rgba(34,197,94,.35);
  box-shadow: 0 .3rem .75rem rgba(34,197,94,.22); }
.pro-btn-success:hover { background: linear-gradient(135deg,#15803d,#16a34a); color: #fff; transform: translateY(-1px); }
.pro-btn-success i { color: #fff; }
.pro-btn-warning { background: linear-gradient(135deg,#f59e0b,#fbbf24); color: #1f2937; border-color: rgba(245,158,11,.4);
  box-shadow: 0 .3rem .75rem rgba(245,158,11,.24); }
.pro-btn-warning:hover { background: linear-gradient(135deg,#d97706,#f59e0b); color: #1f2937; transform: translateY(-1px); }
.pro-btn-warning i { color: #1f2937; }
.pro-btn-icon { width: 40px; height: 40px; padding: 0; border-radius: 12px; }
.pro-btn-icon.pro-btn-sm { width: 34px; height: 34px; }
.pro-btn-block { width: 100%; }

/* ---------- Modal footers (global): centered, pill, filled buttons --------- */
.modal-footer { justify-content: center !important; gap: .6rem; flex-wrap: wrap; }
.modal-footer .btn, .modal-footer .pro-btn {
  border-radius: 999px !important; font-weight: 700; min-height: 42px;
  padding: .55rem 1.4rem !important; display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
}
/* make outline/ghost cancel buttons FILLED (neutral) so every footer button is solid */
.modal-footer .btn-secondary, .modal-footer .btn-outline-secondary,
.modal-footer .btn-outline-light, .modal-footer .btn-light, .modal-footer .pro-btn-outline {
  background: var(--pro-elevated) !important; border: 1px solid var(--pro-border) !important; color: var(--pro-heading) !important;
}
.modal-footer .btn-secondary:hover, .modal-footer .btn-outline-secondary:hover,
.modal-footer .btn-outline-light:hover, .modal-footer .btn-light:hover, .modal-footer .pro-btn-outline:hover {
  background: var(--pro-surface-2) !important; border-color: var(--pro-primary-line) !important; color: var(--pro-primary-2) !important;
}

/* ---------- Small bits -----------------------------------------------------*/
.pro-chip {
  display: inline-flex; align-items: center; gap: .35rem; font-size: .74rem; font-weight: 700;
  padding: .3rem .65rem; border-radius: 999px; background: var(--pro-primary-soft); color: var(--pro-primary-2);
}
.pro-chip-muted { background: var(--pro-elevated); color: var(--pro-muted); border: 1px solid var(--pro-border); }
.pro-badge { display: inline-flex; align-items: center; gap: .3rem; font-size: .74rem; font-weight: 800;
  padding: .26rem .6rem; border-radius: 8px; background: var(--pro-elevated); color: var(--pro-muted); }
.pro-badge-success { background: var(--pro-success-soft); color: var(--pro-success); }
.pro-badge-warning { background: var(--pro-warning-soft); color: var(--pro-warning); }
.pro-badge-danger  { background: var(--pro-danger-soft);  color: var(--pro-danger); }
.pro-badge-info    { background: var(--pro-info-soft);    color: var(--pro-info); }
.pro-badge-primary { background: var(--pro-primary-soft); color: var(--pro-primary-2); }
.pro-pill { display: inline-flex; align-items: center; gap: .35rem; font-size: .76rem; font-weight: 700;
  padding: .3rem .7rem; border-radius: 999px; border: 1px solid var(--pro-border); color: var(--pro-muted); }
.pro-pill .pro-dot { width: 7px; height: 7px; border-radius: 999px; background: currentColor; }
.pro-pill-success { color: var(--pro-success); border-color: color-mix(in srgb,var(--pro-success) 35%,transparent); }
.pro-pill-warning { color: var(--pro-warning); border-color: color-mix(in srgb,var(--pro-warning) 35%,transparent); }
.pro-pill-danger  { color: var(--pro-danger);  border-color: color-mix(in srgb,var(--pro-danger) 35%,transparent); }

.pro-divider { height: 1px; background: var(--pro-border); border: 0; margin: 1.25rem 0; }
.pro-progress { height: 8px; border-radius: 999px; background: var(--pro-elevated); overflow: hidden; }
.pro-progress-bar { height: 100%; border-radius: 999px; background: var(--pro-grad-btn); }
.pro-progress-bar.is-success { background: linear-gradient(135deg,var(--pro-success),#22c55e); }

.pro-avatar { width: 40px; height: 40px; border-radius: 999px; object-fit: cover; background: var(--pro-surface-3); }
.pro-avatar-sm { width: 30px; height: 30px; }
.pro-avatar-lg { width: 64px; height: 64px; }
.pro-avatar-text { display: grid; place-items: center; font-weight: 800; color: #fff; background: var(--pro-grad-btn); font-family: var(--pro-font-head); }
.pro-avatar-stack { display: inline-flex; }
.pro-avatar-stack .pro-avatar { border: 2px solid var(--pro-surface); margin-left: -10px; }
.pro-avatar-stack .pro-avatar:first-child { margin-left: 0; }

.pro-rating { color: #f5b301; font-weight: 700; display: inline-flex; align-items: center; gap: .3rem; }
.pro-rating .pro-rating-count { color: var(--pro-muted); font-weight: 600; }

.pro-search { position: relative; }
.pro-search i { position: absolute; left: .85rem; top: 50%; transform: translateY(-50%); color: var(--pro-faint); }
.pro-input, .pro-search input, .pro-select, .pro-textarea {
  width: 100%; background: var(--pro-elevated); border: 1px solid var(--pro-border);
  border-radius: 12px; color: var(--pro-text); padding: .6rem .9rem; font-size: .9rem; font-family: var(--pro-font);
}
.pro-search input { padding-left: 2.35rem; }
.pro-input:focus, .pro-search input:focus, .pro-select:focus, .pro-textarea:focus {
  outline: none; border-color: var(--pro-primary); box-shadow: 0 0 0 3px var(--pro-primary-soft); }
.pro-label { font-size: .8rem; font-weight: 700; color: var(--pro-heading); margin-bottom: .4rem; display: block; }

/* filter group (catalog) */
.pro-filter-title { font-size: .82rem; font-weight: 800; color: var(--pro-heading); margin-bottom: .6rem; }
.pro-check { display: flex; align-items: center; gap: .55rem; padding: .3rem 0; color: var(--pro-text); font-size: .88rem; cursor: pointer; }
.pro-check input { width: 16px; height: 16px; accent-color: var(--pro-primary); }

/* segmented control / tabs */
.pro-seg { display: inline-flex; gap: .2rem; padding: .25rem; border-radius: 999px; background: var(--pro-elevated); border: 1px solid var(--pro-border); }
.pro-seg button, .pro-seg a { border: 0; background: transparent; color: var(--pro-muted); font-weight: 700; font-size: .84rem;
  padding: .4rem .85rem; border-radius: 999px; cursor: pointer; }
.pro-seg button.active, .pro-seg a.active { background: var(--pro-surface); color: var(--pro-heading); box-shadow: var(--pro-shadow-sm); }
.pro-tabs { display: flex; gap: .35rem; flex-wrap: wrap; border-bottom: 1px solid var(--pro-border); margin-bottom: 1.25rem; overflow: visible; }
.pro-tab { padding: .5rem .95rem; margin-bottom: -1px; color: var(--pro-muted); font-weight: 700; font-size: .9rem; white-space: nowrap;
  text-decoration: none; border: 1px solid transparent; border-bottom: 2.5px solid transparent; border-radius: 10px 10px 0 0; cursor: pointer;
  transition: color .15s ease, background .15s ease, border-color .15s ease; }
.pro-tab:hover { color: var(--pro-heading); background: var(--pro-elevated); }
.pro-tab.active { color: var(--pro-primary-2); font-weight: 800;
  background: color-mix(in srgb, var(--pro-primary) 13%, transparent);
  border-color: var(--pro-primary-line); border-bottom-color: var(--pro-primary); }
html[data-bs-theme="dark"] .pro-tab.active { color: #fff; background: color-mix(in srgb, var(--pro-primary) 32%, transparent); }

/* ---------- Tables ---------------------------------------------------------*/
.pro-table-wrap { background: var(--pro-surface); border: 1px solid var(--pro-border); border-radius: var(--pro-radius);
  overflow: hidden; box-shadow: var(--pro-shadow-sm); }
.pro-table-scroll { overflow-x: auto; }
.pro-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.pro-table thead th { text-align: left; font-size: .72rem; text-transform: uppercase; letter-spacing: .07em;
  color: var(--pro-faint); font-weight: 800; padding: .85rem 1.1rem; background: var(--pro-elevated);
  border-bottom: 1px solid var(--pro-border); white-space: nowrap; }
.pro-table tbody td { padding: .9rem 1.1rem; border-bottom: 1px solid var(--pro-border); color: var(--pro-text); vertical-align: middle; }
.pro-table tbody tr:last-child td { border-bottom: 0; }
.pro-table tbody tr:hover td { background: var(--pro-elevated); }
.pro-table .pro-td-strong { color: var(--pro-heading); font-weight: 700; }

/* ---------- Course cards ---------------------------------------------------*/
.pro-course-card { background: var(--pro-surface); border: 1px solid var(--pro-border); border-radius: var(--pro-radius);
  overflow: hidden; box-shadow: var(--pro-shadow-sm); transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  display: flex; flex-direction: column; height: 100%; }
.pro-course-card:hover { transform: translateY(-4px); box-shadow: var(--pro-shadow); border-color: var(--pro-primary-line); }
.pro-course-thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; background: var(--pro-surface-3); }
.pro-course-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.pro-course-card:hover .pro-course-thumb img { transform: scale(1.06); }
.pro-course-thumb .pro-thumb-top { position: absolute; inset: .7rem .7rem auto .7rem; display: flex; justify-content: space-between; }
.pro-course-thumb .pro-price-tag { background: rgba(2,8,23,.72); color: #fff; backdrop-filter: blur(4px);
  font-weight: 800; font-size: .8rem; padding: .28rem .6rem; border-radius: 8px; }
.pro-course-thumb .pro-price-free { background: var(--pro-success); }
.pro-course-body { padding: 1.05rem 1.1rem 1.2rem; display: flex; flex-direction: column; gap: .55rem; flex: 1; }
.pro-course-title { font-weight: 800; font-size: 1rem; color: var(--pro-heading); line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pro-course-desc { color: var(--pro-muted); font-size: .86rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pro-course-meta { display: flex; flex-wrap: wrap; gap: .35rem .8rem; color: var(--pro-muted); font-size: .8rem; }
.pro-course-meta span { display: inline-flex; align-items: center; gap: .3rem; }
.pro-course-foot { margin-top: auto; display: flex; align-items: center; gap: .55rem; padding-top: .85rem; border-top: 1px solid var(--pro-border); }
.pro-course-row { display: flex; gap: 1.1rem; background: var(--pro-surface); border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius); padding: .9rem; box-shadow: var(--pro-shadow-sm); transition: border-color .18s ease, box-shadow .18s ease; }
.pro-course-row:hover { border-color: var(--pro-primary-line); box-shadow: var(--pro-shadow); }
.pro-course-row .pro-course-thumb { width: 230px; flex: none; border-radius: 12px; aspect-ratio: 16/10; }

/* ---------- Curriculum: accordion (view) -----------------------------------*/
.pro-accordion { display: flex; flex-direction: column; gap: .7rem; }
.pro-acc-item { border: 1px solid var(--pro-border); border-radius: 14px; overflow: hidden; background: var(--pro-surface); }
.pro-acc-head { display: flex; align-items: center; gap: .7rem; padding: .9rem 1.1rem; cursor: pointer; font-weight: 700; color: var(--pro-heading); }
.pro-acc-head .pro-acc-meta { margin-left: auto; color: var(--pro-muted); font-size: .8rem; font-weight: 600; }
.pro-acc-head .pro-acc-caret { transition: transform .2s ease; color: var(--pro-faint); }
.pro-acc-item.open .pro-acc-caret { transform: rotate(180deg); }
.pro-acc-body { padding: 0 1.1rem 1rem; display: none; }
.pro-acc-item.open .pro-acc-body { display: block; }
.pro-lesson { display: flex; align-items: center; gap: .7rem; padding: .6rem .25rem; border-top: 1px solid var(--pro-border); color: var(--pro-text); }
.pro-lesson:first-child { border-top: 0; }
.pro-lesson .pro-lesson-ico { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center;
  background: var(--pro-primary-soft); color: var(--pro-primary-2); font-size: .85rem; flex: none; }
.pro-lesson .pro-lesson-title { font-weight: 600; font-size: .9rem; }
.pro-lesson .pro-lesson-meta { margin-left: auto; display: flex; align-items: center; gap: .5rem; color: var(--pro-muted); font-size: .8rem; }

/* ---------- Curriculum / scheme builder ------------------------------------*/
.pro-builder { display: flex; flex-direction: column; gap: 1rem; }
.pro-block { border: 1px solid var(--pro-border); border-radius: 14px; background: var(--pro-surface); }
.pro-block-head { display: flex; align-items: center; gap: .7rem; padding: .85rem 1rem; border-bottom: 1px solid var(--pro-border); }
.pro-block-head .pro-drag { color: var(--pro-faint); cursor: grab; }
.pro-block-head .pro-block-title { font-weight: 800; color: var(--pro-heading); }
.pro-block-body { padding: .75rem 1rem 1rem; display: flex; flex-direction: column; gap: .55rem; }
.pro-lesson-row { display: flex; align-items: center; gap: .7rem; padding: .65rem .8rem; border: 1px solid var(--pro-border);
  border-radius: 11px; background: var(--pro-elevated); }
.pro-lesson-row .pro-drag { color: var(--pro-faint); cursor: grab; }
.pro-lesson-row .pro-lr-title { font-weight: 600; font-size: .9rem; color: var(--pro-heading); }
.pro-lesson-row .pro-lr-actions { margin-left: auto; display: flex; gap: .3rem; }
.pro-dropzone { border: 1.5px dashed var(--pro-border-strong); border-radius: 12px; padding: 1rem; text-align: center;
  color: var(--pro-muted); font-weight: 600; font-size: .88rem; background: var(--pro-elevated); }

/* ---------- Lesson player --------------------------------------------------*/
.pro-player { display: grid; grid-template-columns: 1fr 340px; gap: 1.25rem; align-items: start; }
.pro-stage { background: var(--pro-surface); border: 1px solid var(--pro-border); border-radius: var(--pro-radius); overflow: hidden; box-shadow: var(--pro-shadow-sm); }
.pro-stage-media { aspect-ratio: 16/9; background: radial-gradient(circle at center, var(--pro-surface-3), var(--pro-surface)); display: grid; place-items: center; color: var(--pro-faint); }
.pro-playlist { background: var(--pro-surface); border: 1px solid var(--pro-border); border-radius: var(--pro-radius); box-shadow: var(--pro-shadow-sm); overflow: hidden; }
.pro-playlist-head { padding: 1rem 1.1rem; border-bottom: 1px solid var(--pro-border); }
.pro-playlist-item { display: flex; align-items: center; gap: .7rem; padding: .7rem 1.1rem; border-bottom: 1px solid var(--pro-border); color: var(--pro-text); cursor: pointer; }
.pro-playlist-item:hover { background: var(--pro-elevated); }
.pro-playlist-item.active { background: var(--pro-primary-soft); }
.pro-playlist-item .pro-pl-state { width: 26px; height: 26px; border-radius: 999px; display: grid; place-items: center; flex: none;
  border: 1px solid var(--pro-border); font-size: .7rem; color: var(--pro-muted); }
.pro-playlist-item.done .pro-pl-state { background: var(--pro-success); color: #fff; border-color: transparent; }
.pro-playlist-item.active .pro-pl-state { background: var(--pro-primary); color: #fff; border-color: transparent; }

/* ---------- Quiz -----------------------------------------------------------*/
.pro-quiz-q { background: var(--pro-surface); border: 1px solid var(--pro-border); border-radius: var(--pro-radius); padding: 1.25rem; margin-bottom: 1rem; box-shadow: var(--pro-shadow-sm); }
.pro-option { display: flex; align-items: center; gap: .75rem; padding: .8rem 1rem; border: 1px solid var(--pro-border);
  border-radius: 12px; margin-top: .6rem; cursor: pointer; color: var(--pro-text); font-weight: 500; }
.pro-option:hover { border-color: var(--pro-primary-line); }
.pro-option .pro-opt-key { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; flex: none;
  border: 1px solid var(--pro-border); font-weight: 800; font-size: .8rem; color: var(--pro-muted); }
.pro-option.selected { border-color: var(--pro-primary); background: var(--pro-primary-soft); }
.pro-option.correct { border-color: var(--pro-success); background: var(--pro-success-soft); }
.pro-option.wrong { border-color: var(--pro-danger); background: var(--pro-danger-soft); }
.pro-score-ring { width: 132px; height: 132px; border-radius: 999px; display: grid; place-items: center; margin: 0 auto;
  background: conic-gradient(var(--pro-primary) calc(var(--val,80) * 1%), var(--pro-elevated) 0); }
.pro-score-ring .pro-score-inner { width: 104px; height: 104px; border-radius: 999px; background: var(--pro-surface);
  display: grid; place-items: center; text-align: center; }
.pro-score-ring .pro-score-val { font-family: var(--pro-font-head); font-size: 1.7rem; font-weight: 800; color: var(--pro-heading); line-height: 1; }

/* ---------- Gallery hub ----------------------------------------------------*/
.pro-hero { position: relative; overflow: hidden; border-radius: var(--pro-radius-lg); border: 1px solid var(--pro-border);
  background: radial-gradient(circle at top right, rgba(56,189,248,.14), transparent 34%), linear-gradient(140deg, var(--pro-surface), var(--pro-surface-2));
  box-shadow: var(--pro-shadow); padding: clamp(1.6rem,4vw,3.2rem); }
.pro-area-card { background: var(--pro-surface); border: 1px solid var(--pro-border); border-radius: var(--pro-radius);
  padding: 1.4rem; box-shadow: var(--pro-shadow-sm); height: 100%; transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease; }
.pro-area-card:hover { border-color: var(--pro-primary-line); box-shadow: var(--pro-shadow); transform: translateY(-3px); }
.pro-area-ico { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 1.4rem;
  background: var(--pro-primary-soft); color: var(--pro-primary-2); margin-bottom: 1rem; }
.pro-variant-btn { display: flex; align-items: center; gap: .7rem; padding: .7rem .85rem; border-radius: 12px;
  border: 1px solid var(--pro-border); background: var(--pro-elevated); color: var(--pro-heading); font-weight: 700; margin-top: .55rem; }
.pro-variant-btn:hover { border-color: var(--pro-primary); color: var(--pro-primary-2); transform: translateX(3px); }
.pro-variant-btn .pro-vb-tag { margin-left: auto; font-size: .72rem; color: var(--pro-faint); font-weight: 700; }
.pro-variant-btn .pro-vb-key { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: var(--pro-grad-btn); color: #fff; font-weight: 800; font-size: .82rem; flex: none; }

.pro-empty { text-align: center; padding: 2.5rem 1rem; color: var(--pro-muted); }
.pro-empty > i { font-size: 2rem; color: var(--pro-faint); margin-bottom: .5rem; display: block; }

/* ---------- Utilities ------------------------------------------------------*/
.pro-soft-bg { background: var(--pro-primary-soft); }
.pro-surface-2 { background: var(--pro-surface-2) !important; }
.pro-rounded { border-radius: var(--pro-radius); }
.pro-border { border: 1px solid var(--pro-border) !important; }
.pro-shadow { box-shadow: var(--pro-shadow); }
.pro-mw-sm { max-width: 560px; }
.pro-hr-vert { width: 1px; align-self: stretch; background: var(--pro-border); }
.pro-grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
.pro-grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; }
.pro-grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; }
.pro-sticky { position: sticky; top: calc(var(--pro-toolbar-h) + 1rem); }

/* mobile menu toggle button (hidden on desktop) */
.pro-menu-btn { display: none; }
.pro-backdrop { display: none; }

/* ---------- Responsive -----------------------------------------------------*/
@media (max-width: 1100px) {
  .pro-player { grid-template-columns: 1fr; }
  .pro-grid-3 { grid-template-columns: repeat(2,1fr); }
  .pro-grid-4 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 991px) {
  .pro-sidebar, .pro-rail {
    position: fixed; left: 0; top: var(--pro-toolbar-h); z-index: 1070;
    height: calc(100vh - var(--pro-toolbar-h)); transform: translateX(-105%); transition: transform .25s ease; width: var(--pro-sidebar-w); flex-basis: var(--pro-sidebar-w);
  }
  .pro-sidebar.show, .pro-rail.show { transform: translateX(0); box-shadow: var(--pro-shadow); }
  .pro-rail .pro-rail-label, .pro-rail .pro-brand-name { opacity: 1; }
  .pro-menu-btn { display: inline-flex; }
  .pro-backdrop.show { display: block; position: fixed; inset: var(--pro-toolbar-h) 0 0; background: rgba(2,8,23,.5); z-index: 1060; }
  .pro-topnav { display: none; }
}
@media (max-width: 720px) {
  .pro-grid-2, .pro-grid-3, .pro-grid-4 { grid-template-columns: 1fr; }
  .pro-course-row { flex-direction: column; }
  .pro-course-row .pro-course-thumb { width: 100%; }
  .pro-tb-tag, .pro-toolbar .pro-tb-title { display: none; }
}