/*
 * CHnet guest Wi-Fi captive portal — styled after chnet.solutions
 * (website/src/styles/tokens.css): flat, technical, squared. CHnet Indigo
 * dominates, one accent per surface, radius 0–8px.
 *
 * Everything is self-hosted: before authorization a guest can reach nothing but
 * wifi.chnet.org, so no Google Fonts / CDN. Mulish falls back to system-ui.
 */

@font-face {
  font-family: 'Rogan';
  src: url('/fonts/Rogan-Regular.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'Rogan';
  src: url('/fonts/Rogan-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: 'Rogan';
  src: url('/fonts/Rogan-Bold.woff2') format('woff2');
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: 'Rogan';
  src: url('/fonts/Rogan-ExtraBold.woff2') format('woff2');
  font-weight: 800;
  font-display: swap;
}

:root {
  --chnet-indigo: #1a237e;
  --chnet-indigo-90: #232c8c;
  --chnet-indigo-70: #4951a4;
  --chnet-indigo-40: #a4a8d1;
  --chnet-indigo-20: #d1d3e8;
  --chnet-indigo-10: #e8e9f4;
  --accent-pink: #e91e63;
  --accent-teal: #1de9b6;
  --white: #ffffff;
  --off-white: #f7f8fb;
  --grey-200: #d8dce4;
  --grey-400: #9097a8;
  --grey-600: #565c72;
  --grey-800: #2a2e44;
  --black: #0a0d1e;

  --bg: var(--white);
  --bg-alt: var(--off-white);
  --fg-1: var(--chnet-indigo);
  --fg-2: var(--grey-800);
  --fg-3: var(--grey-600);
  --line: var(--grey-200);
  --eyebrow: var(--chnet-indigo);
  --btn-bg: var(--chnet-indigo);
  --btn-bg-hover: var(--chnet-indigo-90);
  --btn-fg: var(--white);
  --focus: var(--chnet-indigo-70);
  --field-bg: var(--off-white);

  --font-display: 'Rogan', 'Inter', system-ui, sans-serif;
  --font-body: 'Mulish', 'Proxima Nova', system-ui, -apple-system, 'Segoe UI', sans-serif;

  --fs-display: clamp(2.5rem, 5vw + 1rem, 5rem);
  --fs-eyebrow: 0.8125rem;
  --ls-display: -0.02em;
  --ls-eyebrow: 0.18em;

  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --r-2: 4px;
  --header-h: 72px;
  --container: 1200px;
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--black);
    --bg-alt: #141833;
    --fg-1: var(--white);
    --fg-2: var(--chnet-indigo-20);
    --fg-3: var(--grey-400);
    --line: rgba(255, 255, 255, 0.08);
    --eyebrow: var(--chnet-indigo-70);
    --focus: var(--chnet-indigo-40);
    --field-bg: rgba(255, 255, 255, 0.05);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--bg);
  color: var(--fg-2);
  font: 400 1rem/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}

/* ---------- header (mirrors chnet.solutions) ---------- */
.site-header {
  height: var(--header-h);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo img {
  display: block;
  width: 150px;
  height: auto;
  margin-left: -16px; /* logo artboard has built-in padding */
}
.lang {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--fg-3);
  font: 600 0.6875rem/1 var(--font-display);
  letter-spacing: 0.08em;
  padding: 6px 10px;
  min-width: 36px;
  min-height: 28px;
  border-radius: 999px;
  cursor: pointer;
}
.lang button[aria-pressed='true'] {
  background: var(--fg-1);
  color: var(--bg);
}
.lang button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* ---------- hero ---------- */
.hero {
  display: flex;
  align-items: center;
  padding: var(--sp-7) 0;
}
.hero-inner {
  max-width: 720px;
  text-align: center;
  animation: rise 0.42s var(--ease-out) both;
}
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .hero-inner {
    animation: none;
  }
}

.eyebrow {
  display: inline-block;
  margin: 0 0 var(--sp-4);
  font: 700 var(--fs-eyebrow) / 1 var(--font-display);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--eyebrow);
}
.eyebrow::before {
  content: '→\00a0';
}
.eyebrow.ok {
  color: #0b8f6f;
}
@media (prefers-color-scheme: dark) {
  .eyebrow.ok {
    color: var(--accent-teal);
  }
}

.display {
  margin: 0 0 var(--sp-5);
  font: 800 var(--fs-display) / 1.05 var(--font-display);
  letter-spacing: var(--ls-display);
  color: var(--fg-1);
  text-wrap: balance;
}
.lead {
  margin: 0 auto var(--sp-6);
  max-width: 520px;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--fg-3);
  text-wrap: pretty;
}

/* ---------- connect row (echoes the hero ask field) ---------- */
.connect {
  display: flex;
  align-items: stretch;
  max-width: 560px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: var(--field-bg);
  text-align: left;
}
.check {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  cursor: pointer;
  font-size: 0.9375rem;
  color: var(--fg-2);
  min-height: 56px;
}
.check input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}
.check .box {
  flex: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--fg-3);
  border-radius: 2px;
  display: grid;
  place-items: center;
  transition:
    background 0.12s,
    border-color 0.12s;
}
.check .box::after {
  content: '';
  width: 9px;
  height: 5px;
  border: 2.4px solid var(--white);
  border-top: 0;
  border-right: 0;
  transform: rotate(-45deg) translate(1px, -1px) scale(0);
  transition: transform 0.12s;
}
.check input:checked + .box {
  background: var(--chnet-indigo);
  border-color: var(--chnet-indigo);
}
@media (prefers-color-scheme: dark) {
  .check input:checked + .box {
    background: var(--chnet-indigo-70);
    border-color: var(--chnet-indigo-70);
  }
}
.check input:checked + .box::after {
  transform: rotate(-45deg) translate(1px, -1px) scale(1);
}
.check input:focus-visible + .box {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 56px;
  padding: 0 var(--sp-5);
  border: 0;
  border-radius: 0 var(--r-2) var(--r-2) 0;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font: 700 0.9375rem/1 var(--font-display);
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.12s;
}
.btn:hover {
  background: var(--btn-bg-hover);
}
.btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.btn[aria-busy='true'] {
  cursor: progress;
  opacity: 0.8;
}
.btn[aria-busy='true'] svg {
  animation: nudge 0.7s ease-in-out infinite alternate;
}
@keyframes nudge {
  to {
    transform: translateX(4px);
  }
}
.btn-ghost {
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: transparent;
  color: var(--fg-1);
}
.btn-ghost:hover {
  background: var(--bg-alt);
}

.error {
  max-width: 560px;
  margin: var(--sp-4) auto 0;
  padding: var(--sp-3) var(--sp-4);
  border-left: 3px solid var(--accent-pink);
  background: rgba(233, 30, 99, 0.08);
  color: #b0124a;
  font-size: 0.875rem;
  text-align: left;
}
@media (prefers-color-scheme: dark) {
  .error {
    color: #ff8ab0;
  }
}

/* ---------- facts strip ---------- */
.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 560px;
  margin: var(--sp-6) auto 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.facts > div {
  padding: var(--sp-4) var(--sp-3);
}
.facts > div + div {
  border-left: 1px solid var(--line);
}
.facts dt {
  margin-bottom: 6px;
  font: 600 0.6875rem/1 var(--font-display);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.facts dd {
  margin: 0;
  font: 700 0.9375rem/1.3 var(--font-display);
  color: var(--fg-1);
  overflow-wrap: anywhere;
}

/* ---------- terms ---------- */
.terms {
  max-width: 560px;
  margin: var(--sp-5) auto 0;
  text-align: left;
  font-size: 0.875rem;
}
.terms summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  list-style: none;
  cursor: pointer;
  font: 600 0.75rem/1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.terms summary::-webkit-details-marker {
  display: none;
}
.terms summary::after {
  content: '↓';
  transition: transform 0.12s;
}
.terms[open] summary::after {
  transform: rotate(180deg);
}
.terms summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.terms-body {
  margin-top: var(--sp-2);
  padding: var(--sp-4);
  border-left: 2px solid var(--chnet-indigo);
  background: var(--bg-alt);
  color: var(--fg-2);
}
@media (prefers-color-scheme: dark) {
  .terms-body {
    border-left-color: var(--chnet-indigo-70);
  }
}
.terms-body p {
  margin: 0 0 var(--sp-2);
  line-height: 1.55;
}
.terms-body p:last-child {
  margin: 0;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
}
.footer-inner {
  display: flex;
  justify-content: center;
  gap: var(--sp-2);
  padding-top: var(--sp-4);
  padding-bottom: calc(var(--sp-4) + env(safe-area-inset-bottom));
  font: 600 0.6875rem/1 var(--font-display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
}

/* ---------- small screens ---------- */
@media (max-width: 520px) {
  .hero {
    align-items: flex-start;
    padding-top: var(--sp-6);
  }
  .connect {
    flex-direction: column;
  }
  .btn {
    border-radius: 0 0 var(--r-2) var(--r-2);
  }
  .btn-ghost {
    border-radius: var(--r-2);
    width: 100%;
  }
  .facts {
    grid-template-columns: 1fr 1fr;
  }
  .facts > div:nth-child(3) {
    grid-column: 1 / -1;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}