:root {
  --bg: #0a1322;
  --bg-soft: #0e1a2e;
  --card: #121f35;
  --ink: #e8eef7;
  --muted: #93a4bd;
  --line: #223150;
  --accent: #36c98f;
  --accent-weak: rgba(54, 201, 143, .14);
  --warn: #fbbf24;
  --warn-weak: rgba(251, 191, 36, .14);
  --bad: #f87171;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  min-height: 100dvh;
}

/* Login — safe-area so iPhone notch/home bar don't clip the form (issue #17). */
.login {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  padding: max(16px, env(safe-area-inset-top, 0px))
    max(16px, env(safe-area-inset-right, 0px))
    max(16px, env(safe-area-inset-bottom, 0px))
    max(16px, env(safe-area-inset-left, 0px));
}
.login-card {
  background: var(--card);
  /* Scale with viewport so QHD/4K don't leave a postage-stamp gate (V-FORM-FACTOR). */
  padding: clamp(28px, 2.4vw, 64px);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,.45);
  width: clamp(320px, 34vw, 640px);
  max-width: 100%;
  text-align: center;
  border: 1px solid var(--line);
}
.login-card h1 {
  margin: 0 0 6px;
  font-size: clamp(22px, 1.55vw, 38px);
}
.login-card p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: clamp(14px, 0.95vw, 20px);
}
.login-card input {
  width: 100%;
  padding: clamp(12px, 1vw, 20px);
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: clamp(15px, 1vw, 22px);
  margin-bottom: 14px;
  background: var(--bg-soft);
  color: var(--ink);
}
.login-card input::placeholder { color: var(--muted); }
.login-card button {
  width: 100%;
  padding: clamp(12px, 1vw, 20px);
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #06231a;
  font-weight: 700;
  font-size: clamp(15px, 1vw, 22px);
  cursor: pointer;
  min-height: 48px;
}
.error { color: var(--bad); }

/* Desktop4k: frame the gate so it reads as intentional chrome, not a pin. */
@media (min-width: 2400px) {
  .login {
    background:
      radial-gradient(ellipse 48% 42% at 50% 48%, rgba(54, 201, 143, .10), transparent 70%),
      var(--bg);
  }
  .login::before {
    content: "";
    position: absolute;
    width: min(880px, 48vw);
    height: min(560px, 48vh);
    border-radius: 36px;
    background: rgba(18, 31, 53, .55);
    border: 1px solid rgba(54, 201, 143, .14);
    box-shadow: 0 24px 80px rgba(0,0,0,.45);
    pointer-events: none;
  }
  .login-card {
    position: relative;
    width: clamp(480px, 30vw, 720px);
    padding: clamp(40px, 2.6vw, 72px);
    box-shadow: 0 16px 64px rgba(0,0,0,.55), 0 0 0 1px rgba(54, 201, 143, .16);
  }
}

/* Topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px;
  padding-top: max(12px, env(safe-area-inset-top, 0px));
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
  background: var(--bg-soft); border-bottom: 1px solid var(--line);
  flex-wrap: wrap; gap: 8px;
}
.brand { font-weight: 700; }
.brand span { color: var(--muted); font-weight: 400; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.badge {
  background: var(--accent-weak); color: var(--accent);
  padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
}
.badge.warn { background: var(--warn-weak); color: var(--warn); }
.range { font-size: 13px; color: var(--muted); display: flex; gap: 6px; align-items: center; }
select, .ghost {
  padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--card); color: var(--ink); font-size: 13px; cursor: pointer;
}

/* Tabs — labeled groups (AI & Product / Growth / Technical) */
.tabs {
  display: flex; gap: 20px; padding: 8px 20px 0; flex-wrap: wrap;
  align-items: flex-end; background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.tab-group {
  position: relative; padding-top: 16px; display: flex; flex-wrap: wrap;
  align-items: center;
}
.tab-group + .tab-group { border-left: 1px solid var(--line); padding-left: 20px; }
.tab-group-label {
  position: absolute; top: 0; left: 4px;
  font-size: 10px; text-transform: uppercase; letter-spacing: .06em;
  color: var(--muted); opacity: .8;
}
.tab {
  border: 0; background: transparent; padding: 12px 14px; cursor: pointer;
  font-size: 14px; color: var(--muted); border-bottom: 2px solid transparent;
  min-height: 44px;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

main {
  padding: 20px;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
  padding-bottom: max(20px, env(safe-area-inset-bottom, 0px));
  max-width: 1100px; margin: 0 auto;
}
.section-note { color: var(--muted); font-size: 13px; margin: 0 0 16px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin-bottom: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px;
}
.card .label { color: var(--muted); font-size: 13px; }
.card .value { font-size: 26px; font-weight: 700; margin-top: 6px; }
.card .value .sub { font-size: 12px; font-weight: 400; color: var(--muted); display: block; margin-top: 2px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .grid-2 { grid-template-columns: 1fr; } }

.chart-box, .table-box {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; margin-bottom: 16px;
}
.chart-box h3, .table-box h3 { margin: 0 0 12px; font-size: 15px; }
canvas { max-height: 320px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
td.note { color: var(--muted); }
td.bad { color: var(--bad); font-weight: 600; }

.status { text-align: center; color: var(--muted); font-size: 12px; padding: 8px; }
[hidden] { display: none !important; }

/* Settings (secrets) */
.secret-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 18px; margin-bottom: 14px; max-width: 640px;
}
.secret-card .label { font-weight: 600; margin-bottom: 4px; }
.secret-card code { color: var(--accent); }
.secret-form { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.secret-input {
  flex: 1 1 260px; background: var(--bg-soft); color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; font-size: 14px;
}
.secret-form button {
  background: var(--accent); color: #04130c; border: none; border-radius: 8px;
  padding: 10px 16px; font-weight: 600; cursor: pointer;
}
.secret-form .secret-clear { background: transparent; color: var(--bad); border: 1px solid var(--line); }
.secret-form button:disabled { opacity: .5; cursor: not-allowed; }
.secret-msg { margin: 8px 0 0; }

/* Visually hidden but available to screen readers (form label association). */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}