/* ============================================================
   Dancetu — app screens (product screenshot mockups)
   Single shared stylesheet · vanilla CSS · no build step
   Brand tokens mirror landing-page/styles.css
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  /* surface */
  --bg: #FAF8F4;
  --surface: #FFFFFF;
  --surface-soft: #F4F1EA;
  --surface-muted: #F8FAFC;

  /* ink */
  --ink: #0F172A;
  --ink-muted: #475569;
  --ink-subtle: #64748B;
  --ink-faint: #94A3B8;

  /* brand */
  --primary: #3730A3;
  --primary-hover: #312E81;
  --primary-strong: #1E1B4B;
  --primary-soft: #EEF2FF;

  /* accent */
  --accent: #F59E0B;
  --accent-strong: #D97706;
  --accent-soft: #FEF3C7;

  /* state */
  --success: #16A34A;
  --success-soft: #DCFCE7;
  --warning: #D97706;
  --warning-soft: #FEF3C7;
  --danger: #DC2626;
  --danger-soft: #FEE2E2;
  --info: #0EA5E9;
  --info-soft: #E0F2FE;

  /* dance-style palette */
  --salsa: #4338CA;
  --salsa-soft: #EEF2FF;
  --bachata: #D97706;
  --bachata-soft: #FEF3C7;
  --kizomba: #DB2777;
  --kizomba-soft: #FCE7F3;
  --other: #0D9488;
  --other-soft: #CCFBF1;

  /* role colors (leader / follower) */
  --lead: #4338CA;
  --lead-soft: #E0E7FF;
  --follow: #DB2777;
  --follow-soft: #FCE7F3;

  /* lines */
  --border: #E5E7EB;
  --border-soft: #EEF1F4;
  --border-strong: #D1D5DB;

  /* radius */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 20px;
  --r-2xl: 26px;
  --r-pill: 999px;

  /* shadow */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.07), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 6px 16px -6px rgba(15, 23, 42, 0.12), 0 2px 6px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 18px 38px -12px rgba(15, 23, 42, 0.16), 0 6px 14px -8px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 30px 60px -16px rgba(30, 27, 75, 0.24), 0 12px 24px -12px rgba(30, 27, 75, 0.14);

  /* layout */
  --sidebar-w: 250px;
  --topbar-h: 70px;

  /* type */
  --font-sans: "Inter var", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--primary); color: #fff; }

/* ============================================================
   ADMIN SHELL
   ============================================================ */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: var(--primary-strong);
  color: rgba(255, 255, 255, 0.72);
  display: flex;
  flex-direction: column;
  padding: 18px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.sidebar__brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 6px 8px 18px;
  color: #fff;
}
.sidebar__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent);
  flex-shrink: 0;
}
.sidebar__brand-name { font-size: 18px; font-weight: 800; letter-spacing: -0.01em; }
.sidebar__brand-sub {
  font-size: 11px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
}

.sidebar__section {
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.38);
  padding: 16px 12px 8px;
}
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 500;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}
.nav__item svg { width: 19px; height: 19px; flex-shrink: 0; opacity: 0.85; }
.nav__item:hover { background: rgba(255, 255, 255, 0.06); color: #fff; }
.nav__item--active {
  background: rgba(255, 255, 255, 0.10);
  color: #fff;
  font-weight: 600;
}
.nav__item--active svg { opacity: 1; color: var(--accent); }
.nav__badge {
  margin-left: auto;
  font-size: 11px;
  font-weight: 700;
  background: var(--accent);
  color: var(--primary-strong);
  border-radius: var(--r-pill);
  padding: 1px 8px;
}

.sidebar__spacer { flex: 1; }

.studio-switcher {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
}
.studio-switcher:hover { background: rgba(255, 255, 255, 0.1); }
.studio-switcher__logo {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--kizomba));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  flex-shrink: 0;
}
.studio-switcher__name { color: #fff; font-weight: 700; font-size: 13.5px; }
.studio-switcher__meta { font-size: 11px; color: rgba(255, 255, 255, 0.5); }
.studio-switcher__chev { margin-left: auto; color: rgba(255, 255, 255, 0.5); }

/* ---------- Main + topbar ---------- */
.main { display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 32px;
  background: color-mix(in oklab, var(--bg) 88%, white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(140%) blur(8px);
}
.topbar__title { font-size: 20px; font-weight: 800; letter-spacing: -0.02em; }
.topbar__crumb { font-size: 12.5px; color: var(--ink-subtle); font-weight: 500; margin-top: 1px; }
.topbar__spacer { flex: 1; }

.search {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 280px;
  padding: 9px 14px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  color: var(--ink-subtle);
  font-size: 13.5px;
}
.search svg { width: 16px; height: 16px; flex-shrink: 0; }
.search__kbd {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-faint);
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
}

.icon-btn {
  position: relative;
  width: 40px; height: 40px;
  border-radius: 11px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--ink); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn__dot {
  position: absolute;
  top: 8px; right: 9px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--kizomba);
  border: 2px solid var(--surface);
}

.topbar__user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-left: 4px;
}
.topbar__user-meta { text-align: right; line-height: 1.25; }
.topbar__user-name { font-size: 13.5px; font-weight: 700; }
.topbar__user-role { font-size: 11.5px; color: var(--ink-subtle); }

.content { padding: 28px 32px 40px; flex: 1; }
.content--flush { padding: 0; display: flex; flex-direction: column; min-height: 0; }

/* ============================================================
   GENERIC COMPONENTS
   ============================================================ */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-sm);
}
.card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px 0;
}
.card__title { font-size: 15px; font-weight: 700; }
.card__sub { font-size: 12.5px; color: var(--ink-subtle); margin-top: 2px; }
.card__body { padding: 18px 20px; }
.card__spacer { flex: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 15px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 13.5px;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn svg { width: 16px; height: 16px; }
.btn--primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-xs); }
.btn--primary:hover { background: var(--primary-hover); }
.btn--ghost { background: var(--surface); color: var(--ink); border-color: var(--border-strong); }
.btn--ghost:hover { border-color: var(--ink-muted); }
.btn--soft { background: var(--primary-soft); color: var(--primary); }
.btn--soft:hover { background: color-mix(in oklab, var(--primary-soft) 80%, var(--primary)); }
.btn--accent { background: var(--accent); color: var(--primary-strong); }
.btn--accent:hover { background: var(--accent-strong); color: #fff; }
.btn--sm { padding: 6px 11px; font-size: 12.5px; border-radius: 8px; }
.btn--lg { padding: 12px 20px; font-size: 15px; border-radius: 12px; }
.btn--block { width: 100%; }

/* chips / pills / segmented filters */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 600;
  background: var(--surface-soft);
  color: var(--ink-muted);
  border: 1px solid transparent;
  white-space: nowrap;
}
.chip__dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.chip--salsa { background: var(--salsa-soft); color: var(--salsa); }
.chip--bachata { background: var(--bachata-soft); color: var(--bachata); }
.chip--kizomba { background: var(--kizomba-soft); color: var(--kizomba); }
.chip--other { background: var(--other-soft); color: var(--other); }

.filters { display: inline-flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 600;
  background: var(--surface);
  color: var(--ink-muted);
  border: 1px solid var(--border-strong);
}
.pill:hover { border-color: var(--ink-faint); color: var(--ink); }
.pill--active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pill--active:hover { color: #fff; }
.pill__count {
  font-size: 11px;
  font-weight: 700;
  padding: 0 6px;
  border-radius: var(--r-pill);
  background: rgba(0, 0, 0, 0.07);
}
.pill--active .pill__count { background: rgba(255, 255, 255, 0.22); }

/* badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: var(--r-pill);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.badge svg { width: 12px; height: 12px; }
.badge--success { background: var(--success-soft); color: var(--success); }
.badge--warning { background: var(--warning-soft); color: var(--warning); }
.badge--danger { background: var(--danger-soft); color: var(--danger); }
.badge--info { background: var(--info-soft); color: #0369A1; }
.badge--neutral { background: var(--surface-soft); color: var(--ink-subtle); }
.badge--primary { background: var(--primary-soft); color: var(--primary); }
.badge--dot::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* avatars */
.avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12.5px;
  color: #fff;
  flex-shrink: 0;
  background: var(--av, var(--primary));
  letter-spacing: 0.01em;
}
.avatar--sm { width: 28px; height: 28px; font-size: 11px; }
.avatar--lg { width: 44px; height: 44px; font-size: 15px; }
.avatar--ring { box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--border); }
.av-1 { --av: #4338CA; }
.av-2 { --av: #DB2777; }
.av-3 { --av: #0D9488; }
.av-4 { --av: #D97706; }
.av-5 { --av: #2563EB; }
.av-6 { --av: #7C3AED; }
.av-7 { --av: #DC2626; }
.av-8 { --av: #059669; }
.av-stack { display: inline-flex; }
.av-stack .avatar { margin-left: -10px; box-shadow: 0 0 0 2px var(--surface); }
.av-stack .avatar:first-child { margin-left: 0; }
.av-more {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--surface-soft);
  color: var(--ink-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  margin-left: -10px;
  box-shadow: 0 0 0 2px var(--surface);
}

/* tables */
.table { width: 100%; border-collapse: collapse; }
.table th {
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-subtle);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13.5px;
  vertical-align: middle;
}
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr { transition: background 0.12s; }
.table tbody tr:hover { background: var(--surface-muted); }
.table__user { display: flex; align-items: center; gap: 11px; }
.table__name { font-weight: 600; }
.table__meta { font-size: 12px; color: var(--ink-subtle); }
.td-right { text-align: right; }
.td-num { font-variant-numeric: tabular-nums; font-weight: 600; }

/* progress / credit bars */
.bar {
  height: 7px;
  background: var(--surface-soft);
  border-radius: var(--r-pill);
  overflow: hidden;
}
.bar__fill {
  height: 100%;
  border-radius: var(--r-pill);
  background: var(--primary);
}
.bar--lead .bar__fill { background: var(--lead); }
.bar--follow .bar__fill { background: var(--follow); }

/* ---------- KPI stat cards ---------- */
.kpis { display: grid; gap: 18px; }
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.kpi__top { display: flex; align-items: center; gap: 10px; }
.kpi__icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.kpi__icon svg { width: 19px; height: 19px; }
.kpi__icon--primary { background: var(--primary-soft); color: var(--primary); }
.kpi__icon--accent { background: var(--accent-soft); color: var(--accent-strong); }
.kpi__icon--kizomba { background: var(--kizomba-soft); color: var(--kizomba); }
.kpi__icon--success { background: var(--success-soft); color: var(--success); }
.kpi__label { font-size: 12.5px; color: var(--ink-subtle); font-weight: 600; }
.kpi__value { font-size: 28px; font-weight: 800; letter-spacing: -0.03em; line-height: 1; }
.kpi__row { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; }
.kpi__trend { display: inline-flex; align-items: center; gap: 4px; font-size: 12.5px; font-weight: 700; }
.kpi__trend svg { width: 13px; height: 13px; }
.kpi__trend--up { color: var(--success); }
.kpi__trend--down { color: var(--danger); }
.kpi__trend--flat { color: var(--ink-subtle); }
.kpi__foot { font-size: 12px; color: var(--ink-subtle); }

/* sparkline mini */
.spark { width: 76px; height: 34px; flex-shrink: 0; }

/* ---------- Leader / Follower balance meter ---------- */
.balance {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.balance__bar {
  display: flex;
  height: 10px;
  border-radius: var(--r-pill);
  overflow: hidden;
  background: var(--surface-soft);
}
.balance__lead { background: var(--lead); }
.balance__follow { background: var(--follow); }
.balance__legend {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 600;
}
.balance__legend span { display: inline-flex; align-items: center; gap: 5px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot--lead { background: var(--lead); }
.dot--follow { background: var(--follow); }

/* mini balance used in dense lists */
.mini-balance { display: flex; flex-direction: column; gap: 4px; }
.mini-balance__bar { display: flex; height: 5px; border-radius: var(--r-pill); overflow: hidden; background: rgba(0,0,0,0.06); }
.mini-balance__bar i { display: block; height: 100%; }
.mini-balance__bar .l { background: var(--lead); }
.mini-balance__bar .f { background: var(--follow); }
.mini-balance__txt { font-size: 10.5px; font-weight: 700; color: var(--ink-muted); letter-spacing: 0.01em; }

/* section heading */
.sec-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0 16px;
}
.sec-head h2 { font-size: 16px; font-weight: 700; }
.sec-head .card__sub { margin: 0; }

/* utility */
.row { display: flex; align-items: center; gap: 10px; }
.between { justify-content: space-between; }
.wrap { flex-wrap: wrap; }
.muted { color: var(--ink-subtle); }
.tnum { font-variant-numeric: tabular-nums; }
.grid { display: grid; gap: 18px; }

/* ============================================================
   STUDENT PORTAL SHELL
   ============================================================ */
.portal { min-height: 100vh; background: var(--bg); }
.portal__header {
  position: sticky; top: 0; z-index: 20;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 32px;
  height: 68px;
  background: color-mix(in oklab, var(--bg) 86%, white);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(140%) blur(8px);
}
.portal__brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; }
.portal__mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--primary-strong);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.portal__nav { display: flex; align-items: center; gap: 4px; }
.portal__nav a {
  padding: 8px 14px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 14px;
  color: var(--ink-muted);
}
.portal__nav a:hover { background: var(--surface); color: var(--ink); }
.portal__nav a.is-active { background: var(--primary-soft); color: var(--primary); }
.portal__main { max-width: 1080px; margin: 0 auto; padding: 28px 32px 56px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
}

/* style accent bar (left border) helper */
.acc-salsa { border-left: 3px solid var(--salsa); }
.acc-bachata { border-left: 3px solid var(--bachata); }
.acc-kizomba { border-left: 3px solid var(--kizomba); }
.acc-other { border-left: 3px solid var(--other); }