/* ==========================================================================
   HUB.One — responsive.css
   Breakpoint adjustments for tablet/mobile + mobile preview frame
   ========================================================================== */

/* ===== KPI grid ===== */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.widget-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

@media (max-width: 1280px) {
  .kpi-grid     { grid-template-columns: repeat(2, 1fr); }
  .widget-grid  { grid-template-columns: repeat(2, 1fr); }
  .course-grid  { grid-template-columns: repeat(2, 1fr); }
  .hero { grid-template-columns: 1fr; }
  .hero__visual { min-height: 140px; }
}

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; top: 0; left: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform .25s;
  }
  .sidebar.is-open { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .topbar { padding: 0 16px; }
  .topbar__search { max-width: none; }
  .page { padding: 20px 16px 48px; }
  .topbar__profile .name { display: none; }
  .menu-toggle { display: inline-flex !important; }
}

@media (max-width: 640px) {
  .kpi-grid    { grid-template-columns: 1fr; }
  .widget-grid { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: 1fr; }
  .page__head { flex-direction: column; align-items: stretch; }
  .page__actions { flex-wrap: wrap; }
  .stepper .step__label { font-size: 11px; }
}

.menu-toggle { display: none; }

/* ===== Mobile preview frame (mobile.html) ===== */
.mobile-stage {
  min-height: 100vh;
  background:
    radial-gradient(800px 400px at 80% 10%, rgba(227,6,19,.10), transparent 60%),
    #15181C;
  display: flex; align-items: center; justify-content: center;
  padding: 40px 16px;
  flex-direction: column;
  gap: 16px;
}
.mobile-frame {
  width: 390px;
  height: 844px;
  background: #0F1216;
  border-radius: 48px;
  padding: 14px;
  box-shadow:
    0 30px 80px rgba(0,0,0,.5),
    inset 0 0 0 2px rgba(255,255,255,.04),
    0 0 0 8px #1A1D21,
    0 0 0 9px #2A2F35;
  position: relative;
}
.mobile-frame__notch {
  position: absolute;
  top: 14px; left: 50%; transform: translateX(-50%);
  width: 130px; height: 32px;
  background: #0F1216;
  border-radius: 0 0 18px 18px;
  z-index: 50;
}
.mobile-frame__notch::after {
  content: '';
  position: absolute; top: 9px; right: 24px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: #2A2F35;
  box-shadow: inset 0 0 0 2px #15181C;
}
.mobile-screen {
  width: 100%; height: 100%;
  background: var(--c-bg);
  border-radius: 36px;
  overflow: hidden;
  position: relative;
}

.m-statusbar {
  height: 48px;
  display: flex; justify-content: space-between; align-items: flex-end;
  padding: 0 28px 4px;
  font-size: 14px; font-weight: 600;
  color: var(--c-text);
}
.m-statusbar__icons { display: inline-flex; gap: 6px; align-items: center; }

.m-header {
  background: var(--c-surface);
  padding: 12px 20px 16px;
  border-bottom: 1px solid var(--c-ink-100);
  display: flex; justify-content: space-between; align-items: center;
}
.m-header__brand { font-size: 18px; font-weight: 800; letter-spacing: -.02em; }
.m-header__brand .dot { color: var(--c-primary); }
.m-header__sub { font-size: 11px; color: var(--c-text-muted); margin-top: 2px; }

.m-content {
  height: calc(100% - 48px - 64px - 76px);
  overflow-y: auto;
  padding: 16px 20px 16px;
}
.m-section { margin-bottom: 22px; }
.m-section__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.m-section__title { font-size: 13px; font-weight: 600; }
.m-section__link { font-size: 12px; color: var(--c-primary); font-weight: 500; }

.m-kpi {
  background: var(--c-surface);
  border: 1px solid var(--c-ink-100);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  margin-bottom: 10px;
  display: flex; align-items: center; gap: 14px;
}
.m-kpi__ico {
  width: 40px; height: 40px;
  border-radius: var(--radius);
  background: var(--c-primary-50);
  color: var(--c-primary);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.m-kpi__ico--green { background: var(--c-success-50); color: var(--c-success); }
.m-kpi__ico--amber { background: var(--c-warning-50); color: var(--c-warning); }
.m-kpi__ico--blue  { background: var(--c-info-50); color: var(--c-info); }
.m-kpi__body { flex: 1; }
.m-kpi__label { font-size: 11.5px; color: var(--c-text-muted); }
.m-kpi__value { font-size: 22px; font-weight: 700; letter-spacing: -.01em; line-height: 1; margin-top: 2px; }
.m-kpi__delta { font-size: 11px; color: var(--c-text-muted); }

.m-card {
  background: var(--c-surface);
  border: 1px solid var(--c-ink-100);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 10px;
}
.m-card__title { font-size: 13px; font-weight: 600; margin-bottom: 6px; }

.m-bottomnav {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: var(--c-surface);
  border-top: 1px solid var(--c-ink-100);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 10px 8px 24px;
  z-index: 10;
}
.m-bottomnav__item {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  font-size: 10.5px; font-weight: 500;
  color: var(--c-text-muted);
  padding: 6px 4px;
}
.m-bottomnav__item .ico { width: 22px; height: 22px; }
.m-bottomnav__item.is-active { color: var(--c-primary); }

.mobile-stage__caption {
  color: #B0B5BB; font-size: 12px; margin-top: 4px;
  text-align: center;
}
.mobile-stage__caption a { color: var(--c-primary); }