/* ==========================================================================
   TGSIMS  -  Layout
   App shell (sidebar + topbar), auth shell, landing shell, grids.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Brand mark
   -------------------------------------------------------------------------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
}
.brand-logo {
  display: grid; place-items: center;
  flex-shrink: 0;
}
.brand-logo svg { width: 22px; height: 22px; }
.brand-logo img { display: block; }
.brand-name {
  font-size: var(--fs-md);
  font-weight: var(--fw-extra);
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.1;
}
.brand-sub {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  font-weight: var(--fw-semi);
}

/* ==========================================================================
   APP SHELL  (dashboard, buy, orders, wallet, settings, support…)
   ========================================================================== */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  padding: var(--sp-5) var(--sp-4);
  z-index: var(--z-sidebar);
}
.sidebar-brand { padding: var(--sp-2) var(--sp-2) var(--sp-6); }

.side-nav { display: flex; flex-direction: column; gap: 2px; }
.side-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0.72rem 0.85rem;
  border-radius: var(--r-md);
  color: var(--text-muted);
  font-weight: var(--fw-semi);
  font-size: var(--fs-sm);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.side-link svg { width: 20px; height: 20px; flex-shrink: 0; }
.side-link:hover { background: var(--surface-2); color: var(--text); }
.side-link.is-active {
  background: var(--brand-soft);
  color: var(--brand);
}
.side-link.is-active::before {
  content: "";
  position: absolute;
  left: -4px; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 22px;
  border-radius: var(--r-full);
  background: var(--brand-500);
}
[data-theme="dark"] .side-link.is-active {
  background: linear-gradient(90deg, var(--brand-soft), transparent);
}

.side-section {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-weight: var(--fw-bold);
  padding: var(--sp-5) var(--sp-3) var(--sp-2);
}

.sidebar-foot { margin-top: auto; padding-top: var(--sp-4); }
.sidebar-foot .divider { margin: var(--sp-3) 0; }

.side-user {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-2);
}
.side-user .meta { min-width: 0; }
.side-user .name {
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.side-user .role { font-size: var(--fs-xs); color: var(--text-muted); }

/* ---- Main column ---- */
.main { display: flex; flex-direction: column; min-width: 0; }

/* ---- Topbar ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: 0 var(--sp-8);
  background: var(--topbar-bg);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-search {
  flex: 1;
  max-width: 420px;
}
.topbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.wallet-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.5rem 0.9rem;
  border-radius: var(--r-full);
  background: var(--surface-inv);
  color: #eaf6ff;
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  border: 1px solid var(--border);
}
.wallet-chip svg { width: 18px; height: 18px; color: var(--accent-teal); }
[data-theme="light"] .wallet-chip { background: #0c1526; }

/* ---- Page content ---- */
.page {
  padding: var(--sp-8);
  max-width: var(--content-max);
  width: 100%;
  margin-inline: auto;
}
.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
  margin-bottom: var(--sp-8);
}
.page-title { font-size: var(--fs-2xl); font-weight: var(--fw-extra); }
.page-subtitle { color: var(--text-muted); margin-top: var(--sp-2); max-width: 60ch; }

/* ---- Common grids ---- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
.grid-sidebar-main { display: grid; grid-template-columns: 1fr 2fr; gap: var(--sp-6); align-items: start; }
.grid-main-aside { display: grid; grid-template-columns: 2fr 1fr; gap: var(--sp-6); align-items: start; }

/* ==========================================================================
   AUTH SHELL
   ========================================================================== */
.auth-top {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-8);
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

/* Split layout (register)  -  centered, contained panel + form card */
.auth-split {
  max-width: 1160px;
  margin-inline: auto;
  padding: var(--sp-12) var(--sp-8);
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: var(--sp-10);
  align-items: stretch;
  min-height: calc(100vh - var(--topbar-h) - 64px);
}
.auth-hero {
  position: relative;
  background: var(--surface-inv);
  color: #eaf0fb;
  padding: var(--sp-16) var(--sp-12);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;
}
.auth-hero::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 50% at 80% 10%, rgba(37,99,235,0.35), transparent 70%),
    radial-gradient(50% 40% at 10% 90%, rgba(34,211,238,0.18), transparent 70%);
  z-index: -1;
}
.auth-hero h2 { color: #fff; font-size: var(--fs-3xl); font-weight: var(--fw-extra); }
.auth-hero .lede { color: rgba(234,240,251,0.75); margin-top: var(--sp-4); max-width: 42ch; }

.auth-checklist { margin-top: var(--sp-8); display: flex; flex-direction: column; gap: var(--sp-4); }
.auth-checklist li { display: flex; align-items: center; gap: var(--sp-3); color: rgba(234,240,251,0.9); font-size: var(--fs-sm); }
.auth-checklist .tick { color: var(--accent-cyan); flex-shrink: 0; }
.auth-checklist .tick svg { width: 22px; height: 22px; }

.auth-hero-stats { margin-top: var(--sp-12); display: flex; gap: var(--sp-8); }
.auth-hero-stats .n { font-size: var(--fs-xl); font-weight: var(--fw-extra); color: var(--accent-cyan); }
.auth-hero-stats .l { font-size: var(--fs-xs); color: rgba(234,240,251,0.6); text-transform: uppercase; letter-spacing: 0.05em; }

.auth-form-col {
  display: grid;
  place-items: center;
}
.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-md);
  padding: var(--sp-10);
}
.auth-card.is-centered { margin-inline: auto; }
.auth-title { font-size: var(--fs-2xl); font-weight: var(--fw-extra); }
.auth-sub { color: var(--text-muted); margin-top: var(--sp-1); }

.auth-center {
  min-height: calc(100vh - var(--topbar-h) - 64px);
  display: grid;
  place-items: center;
  padding: var(--sp-8);
}

.auth-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
  padding: var(--sp-6) var(--sp-8);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}
.auth-foot-links { display: flex; gap: var(--sp-6); }
.auth-foot-links a { color: var(--text-muted); }
.auth-foot-links a:hover { color: var(--text); }

/* ==========================================================================
   LANDING SHELL
   ========================================================================== */
.lp-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--topbar-bg);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.lp-nav-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}
.lp-nav-links { display: flex; align-items: center; gap: var(--sp-8); }
.lp-nav-links a {
  color: var(--text-muted);
  font-weight: var(--fw-semi);
  font-size: var(--fs-sm);
  transition: color var(--dur) var(--ease);
}
.lp-nav-links a:hover { color: var(--text); }
.lp-nav-actions { display: flex; align-items: center; gap: var(--sp-3); }
.lp-nav-login {
  color: var(--text);
  font-weight: var(--fw-semi);
  font-size: var(--fs-sm);
  padding: 0.5rem 0.4rem;
  transition: color var(--dur) var(--ease);
}
.lp-nav-login:hover { color: var(--brand); }

.lp-section { padding: var(--sp-20) 0; }
.lp-section-sm { padding: var(--sp-16) 0; }
/* Tighter rhythm for the stacked mid-page sections (steps, platforms,
   use cases, pricing, faq, community, cta) so they read as one flow. */
.lp-section-tight { padding: var(--sp-10) 0; }
.lp-eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  color: var(--success);
  background: var(--success-bg);
  font-weight: var(--fw-bold);
  font-size: var(--fs-xs);
  padding: 0.35rem 0.8rem;
  border-radius: var(--r-full);
}
.lp-eyebrow .live-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--success);
  animation: pulse 2s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.5); }
  50% { box-shadow: 0 0 0 5px rgba(16,185,129,0); }
}

.lp-h2 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-extra);
  text-align: center;
  letter-spacing: -0.02em;
}
.lp-lede {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--fs-sm);
  max-width: 56ch;
  margin: var(--sp-3) auto 0;
}
.grad-text {
  background: linear-gradient(100deg, var(--brand-500), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Footer  -  single row: brand · links · social, then a thin copyright bar */
.lp-footer {
  background: var(--surface-inv);
  color: rgba(234,240,251,0.7);
  padding: var(--sp-10) 0 var(--sp-8);
}
.lp-footer a { color: rgba(234,240,251,0.72); font-size: var(--fs-sm); }
.lp-footer a:hover { color: #fff; }
.lp-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
  padding-bottom: var(--sp-6);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.lp-footer-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  flex-wrap: wrap;
}
.lp-footer-social { display: flex; align-items: center; gap: var(--sp-2); }
.lp-social {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: rgba(234,240,251,0.8);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.lp-social svg { width: 18px; height: 18px; }
.lp-social:hover { background: rgba(255,255,255,0.12); color: #fff; }
.lp-footer-copy {
  padding-top: var(--sp-6);
  font-size: var(--fs-xs);
  color: rgba(234,240,251,0.5);
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
.menu-btn { display: none; }
.sidebar-scrim { display: none; }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-sidebar-main,
  .grid-main-aside { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: var(--sidebar-w);
    transform: translateX(-100%);
    transition: transform var(--dur-slow) var(--ease-out);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-scrim {
    display: block;
    position: fixed; inset: 0;
    background: rgba(6,12,24,0.5);
    z-index: calc(var(--z-sidebar) - 1);
    opacity: 0; visibility: hidden;
    transition: opacity var(--dur) var(--ease), visibility var(--dur);
  }
  .sidebar-scrim.is-open { opacity: 1; visibility: visible; }
  .menu-btn { display: grid; }
  .topbar { padding: 0 var(--sp-4); }
  .page { padding: var(--sp-5); }
  .auth-split { grid-template-columns: 1fr; }
  .auth-hero { display: none; }
  .lp-nav-links { display: none; }
}

@media (max-width: 640px) {
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .page-head { flex-direction: column; }
  .lp-section { padding: var(--sp-16) 0; }
  .topbar-search { display: none; }
  .auth-top, .auth-foot { padding-inline: var(--sp-4); }
}