:root {
  --tmo-magenta: #e20074;
  --tmo-magenta-dark: #a4005c;
  --tmo-magenta-soft: #ffeaf5;
  --ink: #1a1a1a;
  --ink-2: #4a4a4a;
  --muted: #7a7a7a;
  --line: #e6e6e6;
  --bg: #f5f5f7;
  --bubble: #e9e9eb;
  --phone-shell: #1c1c1e;
  --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-pop: 0 12px 32px rgba(226, 0, 116, 0.18);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--tmo-magenta-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover,
a:focus-visible {
  color: var(--tmo-magenta);
}

button {
  font-family: inherit;
}

.page {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 16px 48px;
}

/* ---------- Banner ---------- */
.banner {
  background: var(--tmo-magenta);
  color: #fff;
  padding: 28px 22px;
  border-radius: 0 0 var(--radius) var(--radius);
  margin: 0 -16px 24px;
  box-shadow: var(--shadow-soft);
}

.banner .eyebrow {
  margin: 0 0 6px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.85;
  font-weight: 600;
}

.banner h1 {
  margin: 0 0 12px;
  font-size: 1.6rem;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.banner .lede {
  margin: 0 0 14px;
  font-size: 1rem;
  font-weight: 500;
}

.banner .hint {
  margin: 14px 0 0;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.flag-dot,
.flag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ffd400;
  color: var(--ink);
  font-weight: 800;
  font-size: 0.85rem;
  flex-shrink: 0;
  border: 2px solid var(--ink);
  line-height: 1;
}

@media (min-width: 600px) {
  .banner {
    padding: 36px 32px;
  }
  .banner h1 {
    font-size: 2rem;
  }
}

/* ---------- Phone mock ---------- */
.phone-wrap {
  position: relative;
  margin: 0 auto 28px;
}

.phone {
  background: var(--phone-shell);
  border-radius: 36px;
  padding: 12px 10px 18px;
  max-width: 360px;
  margin: 0 auto;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18), 0 2px 0 rgba(255, 255, 255, 0.04) inset;
  border: 1px solid #000;
}

.phone-status {
  display: flex;
  justify-content: space-between;
  padding: 6px 16px 8px;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
}

.battery {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.battery::after {
  content: "";
  display: inline-block;
  width: 22px;
  height: 11px;
  border: 1px solid #fff;
  border-radius: 3px;
  position: relative;
  background: linear-gradient(to right, #fff 75%, transparent 75%);
}

.phone-header {
  background: #f6f6f6;
  border-radius: 16px 16px 0 0;
  padding: 10px 14px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.phone-header .back {
  color: #007aff;
  font-size: 0.95rem;
}

.phone-header .contact {
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
}

.thread {
  background: #fff;
  padding: 18px 14px 22px;
  min-height: 220px;
}

.bubble {
  max-width: 86%;
  padding: 10px 14px;
  border-radius: 18px;
  font-size: 0.95rem;
  line-height: 1.45;
  position: relative;
}

.bubble.received {
  background: var(--bubble);
  color: var(--ink);
  border-bottom-left-radius: 6px;
}

.bubble-text {
  display: block;
}

.bubble-time {
  display: block;
  margin-top: 6px;
  font-size: 0.7rem;
  color: var(--muted);
}

.url {
  color: #007aff;
  text-decoration: underline;
  word-break: break-all;
}

.phone-input {
  background: #f6f6f6;
  border-radius: 0 0 16px 16px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  border-top: 1px solid var(--line);
}

.input-placeholder {
  flex: 1;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---------- Red flag buttons ---------- */
.flag {
  cursor: pointer;
  margin: 0 2px;
  vertical-align: 1px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  padding: 0;
}

.flag:hover,
.flag:focus-visible {
  transform: scale(1.12);
  outline: none;
  box-shadow: 0 0 0 3px rgba(226, 0, 116, 0.25);
}

.flag[aria-pressed="true"] {
  background: var(--tmo-magenta);
  color: #fff;
  border-color: #fff;
  box-shadow: 0 0 0 3px var(--tmo-magenta);
}

/* ---------- Callout ---------- */
.callout {
  position: relative;
  margin: 16px auto 0;
  max-width: 360px;
  background: #fff;
  border: 2px solid var(--tmo-magenta);
  border-radius: var(--radius);
  padding: 16px 44px 16px 16px;
  box-shadow: var(--shadow-pop);
}

.callout[hidden] {
  display: none;
}

.callout::before {
  content: "";
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 16px;
  height: 16px;
  background: #fff;
  border-left: 2px solid var(--tmo-magenta);
  border-top: 2px solid var(--tmo-magenta);
}

.callout-title {
  margin: 0 0 6px;
  font-size: 1rem;
  color: var(--tmo-magenta-dark);
}

.callout-body {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-2);
}

.callout-close {
  position: absolute;
  top: 6px;
  right: 8px;
  width: 32px;
  height: 32px;
  border: 0;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
  border-radius: 50%;
}

.callout-close:hover,
.callout-close:focus-visible {
  background: var(--tmo-magenta-soft);
  color: var(--tmo-magenta-dark);
  outline: none;
}

/* ---------- Indicator list ---------- */
.indicators,
.next-steps {
  background: #fff;
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  margin: 0 0 20px;
  box-shadow: var(--shadow-soft);
}

.indicators h2,
.next-steps h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--tmo-magenta-dark);
}

.section-lede {
  margin: 0 0 14px;
  color: var(--ink-2);
  font-size: 0.95rem;
}

.example-title {
  margin: 0 0 6px;
  font-size: 1.15rem;
  color: var(--tmo-magenta-dark);
  text-align: center;
}

.example-lede {
  text-align: center;
  margin-bottom: 18px;
}

.example-lede .flag-dot {
  width: 20px;
  height: 20px;
  font-size: 0.78rem;
  vertical-align: -4px;
  margin: 0 2px;
}

.indicator-list,
.next-steps ol {
  margin: 0;
  padding-left: 20px;
}

.indicator-list li,
.next-steps li {
  margin-bottom: 10px;
}

.indicator-list li:last-child,
.next-steps li:last-child {
  margin-bottom: 0;
}

.indicator-list strong,
.next-steps strong {
  color: var(--ink);
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 18px 8px 0;
}

.footer p {
  margin: 6px 0;
}

.fineprint {
  font-size: 0.75rem;
  opacity: 0.8;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .flag {
    transition: none;
  }
}