/* ============================================================
   Mobile-responsive overhaul.
   Loaded after base.css + app.css; overrides where needed.
   ============================================================ */

/* ── Hamburger button + mobile drawer ─────────────────────────────────── */
.site-burger {
  display: none;
  width: 40px; height: 40px;
  background: transparent; border: 1px solid var(--border);
  border-radius: 8px; padding: 0;
  align-items: center; justify-content: center;
  cursor: pointer;
}
.site-burger span {
  display: block; width: 18px; height: 2px;
  background: var(--fg); border-radius: 2px;
  margin: 2px 0; transition: transform .15s, opacity .15s;
}
[data-mobile-open="true"] .site-burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
[data-mobile-open="true"] .site-burger span:nth-child(2) { opacity: 0; }
[data-mobile-open="true"] .site-burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-drawer {
  position: fixed; inset: 0; z-index: 80;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: grid; place-items: stretch;
  overflow: auto;
}
/* The HTML `hidden` attribute would normally do this, but `display: grid` above
   overrides it. Force the override back. */
.site-drawer[hidden] { display: none !important; }
.site-drawer__inner {
  width: 100%; max-width: 480px; margin: 0 auto;
  padding: 28px 24px 48px;
  background: var(--surface);
  min-height: 100%;
  display: flex; flex-direction: column; gap: 18px;
}
.site-drawer__close {
  align-self: flex-end;
  width: 40px; height: 40px;
  background: transparent; border: 1px solid var(--border);
  border-radius: 999px; color: var(--fg);
  font-size: 22px; line-height: 1; padding: 0; cursor: pointer;
}
.site-drawer__brand {
  font-family: var(--serif); font-size: 22px; font-weight: 600;
}
.site-drawer__nav { display: flex; flex-direction: column; gap: 2px; }
.site-drawer__link {
  display: block; padding: 14px 12px; border-radius: 10px;
  font-size: 16px; color: var(--fg); background: transparent;
  border: 0; text-align: left; cursor: pointer; width: 100%;
  font-family: var(--sans);
}
.site-drawer__link:hover, .site-drawer__link:focus { background: var(--surface-muted); }
.site-drawer__link--primary {
  background: var(--accent); color: var(--accent-fg); text-align: center; font-weight: 500;
}
.site-drawer__link--primary:hover { opacity: 0.92; background: var(--accent); }
.site-drawer__link--btn { color: var(--fg-muted); }
.site-drawer__rule { border: 0; border-top: 1px solid var(--border); margin: 0; }

/* ── Header & actions on mobile ───────────────────────────────────────── */
@media (max-width: 767px) {
  .site-header__inner { gap: 8px; }
  .site-burger { display: inline-flex; }
  /* Hide secondary actions in the bar — drawer carries them */
  .site-actions__signed-out,
  .site-actions__signed-in,
  .site-actions__locale { display: none; }
  .site-actions { gap: 6px; }
  .site-brand__name { display: none; }

  /* Pickers inside the mobile drawer: full-width, no absolute dropdown. */
  .site-drawer__pickers { display: grid; gap: 8px; }
  .site-drawer__pickers .picker { width: 100%; }
  .site-drawer__pickers .picker > summary {
    width: 100%; justify-content: space-between;
    height: 44px; padding: 0 14px;
    border: 1px solid var(--border); border-radius: 12px;
    background: var(--surface-muted);
  }
  .site-drawer__pickers .picker__panel {
    position: static;
    width: 100%; max-height: 50vh;
    margin-top: 6px;
    box-shadow: none;
  }
  .site-drawer__pickers .picker__panel--wide { width: 100%; }
  .site-drawer__pickers .picker__list--cols { grid-template-columns: 1fr; }
}
@media (min-width: 768px) {
  .site-drawer { display: none !important; }
  .site-burger { display: none !important; }
}

/* ── Generic spacing reductions on phone ──────────────────────────────── */
@media (max-width: 640px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .section { padding: 32px 0; }
  .page-hero { padding: 32px 0 18px; }
  .page-hero__title { font-size: 26px; line-height: 1.2; }
  .page-hero__lede { font-size: 15px; }
  .hero__grid { padding: 36px 0; gap: 32px; }
  .hero__title { font-size: 28px; line-height: 1.12; }
  .hero__lede { font-size: 16px; }
  .hero__cta .btn { width: 100%; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__note { font-size: 13px; align-items: flex-start; line-height: 1.5; }
  .hero__note > :first-child { margin-top: 2px; flex-shrink: 0; }
  .section__title { font-size: 22px; }
  .grid-cards { grid-template-columns: 1fr; }
}

/* ── Site footer columns on small screens ─────────────────────────────── */
@media (max-width: 640px) {
  .site-footer { margin-top: 48px; padding: 28px 0 16px; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .site-footer__brand { grid-column: 1 / -1; }
}

/* ── Catalog filterbar on mobile ──────────────────────────────────────── */
@media (max-width: 767px) {
  .catalog-head { margin: 18px 4px 14px; }
  .catalog-head__title { font-size: 28px; }
  .catalog-head__lede { font-size: 14px; }

  .filterbar { flex-wrap: wrap; border-radius: 16px; }
  .filterbar > * + * { border-inline-start: 0; }
  .filterbar__search {
    width: 100%; height: 54px;
    padding: 0 14px; gap: 10px;
    border-bottom: 1px solid var(--border);
  }
  .filterbar__search input { font-size: 14px; }
  .filterbar__kbd { display: none; }
  .filterbar__cell {
    flex: 1 1 calc(50% - 1px);
    padding: 10px 14px; height: 56px;
    border-inline-start: 1px solid var(--border);
  }
  .filterbar__cell:nth-of-type(2) { border-inline-start: 0; }
  .filterbar__cell-label { font-size: 10px; letter-spacing: 0.1em; }
  .filterbar__cell select { font-size: 14px; }
  .filterbar__icon-btn {
    width: auto; flex: 1; height: 56px;
    border-top: 1px solid var(--border);
    border-inline-start: 1px solid var(--border);
  }

  .catalog-bar { flex-wrap: wrap; margin-bottom: 14px; gap: 12px; }
  .catalog-bar__count strong { font-size: 16px; }
  .view-toggle button { padding: 5px 10px; font-size: 12px; }
}

@media (max-width: 480px) {
  .filterbar__cell { flex: 1 1 100%; border-inline-start: 0 !important; border-top: 1px solid var(--border); }
  .filterbar__cell:first-of-type { border-top: 0; }
  .filterbar__icon-btn { flex: 1 1 100%; }
}

/* ── Course detail: drop sticky sidebar, full-width buy card ──────────── */
@media (max-width: 959px) {
  .course-buy { position: static; top: auto; }
  .course__title { font-size: 26px; }
  .course__sub { font-size: 15px; }
  .course__meta { font-size: 12px; }
}
@media (max-width: 640px) {
  .course-buy__price strong { font-size: 26px; }
  .course-buy { padding: 16px; }
  .lessons__item { grid-template-columns: 32px 1fr auto; padding: 10px 12px; font-size: 13px; }
  .review { padding: 14px; }
}

/* ── Reviews avatar on small screens ──────────────────────────────────── */
@media (max-width: 480px) {
  .review__head { flex-wrap: wrap; }
}

/* ── Cart row stack on phones ─────────────────────────────────────────── */
@media (max-width: 640px) {
  .cart-row {
    grid-template-columns: 60px 1fr;
    grid-template-areas: "thumb main" "thumb price" "actions actions";
    align-items: start; gap: 10px;
  }
  .cart-row__thumb { width: 60px; grid-area: thumb; }
  .cart-row__main  { grid-area: main; }
  .cart-row__price { grid-area: price; font-size: 15px; }
  .cart-row form   { grid-area: actions; }
  .cart-totals { max-width: none; margin-left: 0; }
}

/* ── Checkout: stack pay options ──────────────────────────────────────── */
@media (max-width: 640px) {
  .pay-option { padding: 14px; }
  .pay-option__head { flex-direction: column; gap: 8px; align-items: flex-start; }
  .pay-option__price { font-size: 18px; }
  .checkout__side { position: static; }
}

/* ── Cabinet sidebar → horizontal nav on mobile ───────────────────────── */
@media (max-width: 899px) {
  .cabinet { padding: 16px 16px 64px; gap: 16px; }
  .cabinet__side {
    position: static; padding: 12px;
    border-radius: 10px;
  }
  .cabinet__user { padding-bottom: 10px; margin-bottom: 6px; }
  .cabinet__nav {
    flex-direction: row;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
    margin-bottom: -4px;
  }
  .cabinet__nav-link {
    white-space: nowrap;
    padding: 8px 12px;
    font-size: 13px;
  }
  .cabinet__nav hr { display: none; }
  .cabinet__signout { margin-left: auto; }
  .cabinet__h1 { font-size: 24px; }
  .cabinet__grid { grid-template-columns: 1fr; gap: 10px; }
  .cabinet__tile { padding: 14px; }
  .cabinet__tile-value { font-size: 22px; }
}

/* ── Auth card padding on phone ───────────────────────────────────────── */
@media (max-width: 480px) {
  .auth-wrap { padding: 24px 12px; }
  .auth-card { padding: 22px 20px; border-radius: 12px; }
  .auth-card__title { font-size: 22px; }
}

/* ── Tables → horizontal scroll wrapper on phone ──────────────────────── */
@media (max-width: 640px) {
  .txn-table { display: block; overflow-x: auto; white-space: nowrap; }
  .txn-table th, .txn-table td { padding: 8px 12px; }
}

/* ── Dev switcher: hide on phone to avoid covering content ────────────── */
@media (max-width: 640px) {
  .dev-switcher { transform: scale(0.85); transform-origin: bottom right; opacity: 0.85; }
}

/* ── Course-buy FOMO timer tighter on phone ───────────────────────────── */
@media (max-width: 480px) {
  .course-buy__fomo { font-size: 11px; padding: 6px 8px; }
}

/* ── Certificate viewport scaling ─────────────────────────────────────── */
@media (max-width: 980px) {
  .cert { padding: 36px 32px 28px; box-shadow: 0 18px 40px -20px rgba(0,0,0,0.18); }
  .cert__header { gap: 12px; }
  .cert__type { font-size: 10px; }
  .cert__type-label { font-size: 18px; }
  .cert__recipient { font-size: 32px; }
  .cert__recipient::after { width: 160px; }
  .cert__course-title { font-size: 20px; }
  .cert__section { padding: 16px 14px; }
  .cert-skill {
    grid-template-columns: 16px 1fr;
    grid-template-areas: "mark name" "mark proof" "level level" "hours hours";
    gap: 2px 10px;
  }
  .cert-skill__mark  { grid-area: mark; }
  .cert-skill__name  { grid-area: name; }
  .cert-skill__proof { grid-area: proof; }
  .cert-skill__level { grid-area: level; justify-self: start; margin-top: 6px; }
  .cert-skill__hours { grid-area: hours; }
  .cert__metrics { grid-template-columns: 1fr; }
  .cert__footer { grid-template-columns: 1fr; gap: 18px; }
  .cert__credential { text-align: left; }
  .cert__seal-wrap { justify-content: flex-start; }
  .seal { --seal-size: 100px; }
  .cert-path { grid-template-columns: 1fr; }
  .cert-path__align { font-size: 18px; }
  .cert-path--top .cert-path__align { font-size: 26px; }
  .cert-self__confidence { grid-template-columns: 1fr; }
}

/* ── Touch tap targets (a11y) ─────────────────────────────────────────── */
@media (max-width: 640px) {
  .btn { min-height: 44px; }
  .btn--sm { min-height: 36px; }
  .site-nav__link, .site-footer__list a { padding: 6px 0; display: inline-block; }
}

/* ── Body should never have horizontal scroll on mobile ───────────────── */
html, body { overflow-x: hidden; }