/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --color-bg:      #f8fafc;
  --color-surface: #ffffff;
  --color-border:  #e2e8f0;
  --color-ink:     #0f172a;
  --color-muted:   #64748b;
  --color-error:   #dc2626;
  --color-success: #16a34a;
  --radius-card:   0.75rem;
  --radius-btn:    0.4375rem;
  --radius-input:  0.4375rem;
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

/* ── Skip link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-ink);
  color: #fff;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 0.375rem 0;
  z-index: 9999;
}
.skip-link:focus { top: 0; }

/* ── Layout ── */
.container {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-btn);
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn:focus-visible {
  outline: 0.125rem solid var(--color-ink);
  outline-offset: 0.125rem;
}
.btn-primary { background: var(--color-ink); color: var(--color-bg); }
.btn-primary:not(:disabled):hover { filter: brightness(1.15); }
.btn-primary:disabled { opacity: 0.5; cursor: default; }
.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-border);
}
.btn-ghost:not(:disabled):hover { background: var(--color-bg); }
.btn-lg { padding: 0.75rem 1.75rem; font-size: 0.9375rem; }
.btn-full { width: 100%; }

/* ── Header ── */
header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.5rem;
  max-width: 60rem;
  margin: 0 auto;
}
.logo {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: -0.03125rem;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}
.logo-badge {
  background: var(--color-ink);
  color: var(--color-bg);
  border-radius: 0.25rem;
  padding: 0.0625rem 0.375rem;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03125rem;
}

/* ── Header user menu ── */
.header-user-menu {
  position: relative;
}
.header-user-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  color: var(--color-muted);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.header-user-btn:hover {
  color: var(--color-ink);
  border-color: var(--color-ink);
  background: var(--color-bg);
}
.header-user-btn:focus-visible {
  outline: 0.125rem solid var(--color-ink);
  outline-offset: 0.125rem;
}
.header-user-dropdown {
  position: absolute;
  top: calc(100% + 0.375rem);
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
  min-width: 11rem;
  padding: 0.25rem;
  z-index: 200;
}
.header-user-dropdown button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: none;
  border: none;
  border-radius: 0.3125rem;
  font-size: 0.875rem;
  color: var(--color-ink);
  cursor: pointer;
  transition: background 0.15s;
}
.header-user-dropdown button:hover { background: var(--color-bg); }
.header-user-dropdown button:focus-visible {
  outline: 0.125rem solid var(--color-ink);
  outline-offset: -0.125rem;
}
.header-user-dropdown hr {
  margin: 0.25rem 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

/* ── A11y toolbar ── */
.a11y-toolbar {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.a11y-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  border-radius: var(--radius-btn);
  padding: 0.375rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  line-height: 1;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.a11y-btn:hover {
  background: var(--color-bg);
  color: var(--color-ink);
}
.a11y-btn:focus-visible {
  outline: 0.125rem solid var(--color-ink);
  outline-offset: 0.125rem;
}
.a11y-btn[aria-pressed="true"] {
  background: var(--color-ink);
  color: var(--color-surface);
  border-color: var(--color-ink);
}

/* ── Lang switcher ── */
.lang-switcher { display: flex; gap: 0.125rem; align-items: center; }
.lang-btn {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  color: var(--color-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  line-height: 1;
}
.lang-btn[aria-current="page"] {
  color: var(--color-ink);
  border-color: var(--color-border);
}
.lang-btn:hover { color: var(--color-ink); }
.lang-btn:focus-visible {
  outline: 0.125rem solid var(--color-ink);
  outline-offset: 0.125rem;
}

/* ── Hero ── */
.hero {
  padding: 5rem 1.5rem 4.5rem;
  text-align: center;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.hero h1 {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.09375rem;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  max-width: 42.5rem;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 em {
  font-style: normal;
  border-bottom: 0.1875rem solid var(--color-ink);
}
.hero p {
  font-size: 1.0625rem;
  color: var(--color-muted);
  max-width: 32.5rem;
  margin: 0 auto 2.25rem;
  line-height: 1.7;
}
.hero-ctas {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Sections ── */
section { padding: 4rem 0; }
section + section { border-top: 1px solid var(--color-border); }
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.0625rem;
  color: var(--color-muted);
  margin-bottom: 0.625rem;
}
.section-title {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.03125rem;
  margin-bottom: 2.5rem;
}
.section-center { text-align: center; }

/* ── How it works ── */
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.5rem;
}
.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 1.75rem 1.5rem;
  text-align: left;
}
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.875rem;
  height: 1.875rem;
  background: var(--color-ink);
  color: var(--color-bg);
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 700;
  margin-bottom: 0.875rem;
}
.step-card h3 { font-size: 0.9375rem; font-weight: 600; margin-bottom: 0.5rem; }
.step-card p  { font-size: 0.875rem; color: var(--color-muted); line-height: 1.65; }
.step-card code {
  font-family: ui-monospace, monospace;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  padding: 0.0625rem 0.3125rem;
  font-size: 0.75rem;
}

/* ── Why it matters ── */
.matters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16.25rem, 1fr));
  gap: 1.5rem;
}
.matters-card {
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}
.matters-stat {
  font-size: 2.125rem;
  font-weight: 800;
  letter-spacing: -0.0625rem;
  line-height: 1;
  margin-bottom: 0.625rem;
}
.matters-card h3 { font-size: 0.9375rem; font-weight: 600; margin-bottom: 0.5rem; }
.matters-card p  { font-size: 0.875rem; color: var(--color-muted); line-height: 1.65; }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--color-border);
  padding: 1.75rem 1.5rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-muted);
}
footer a { color: var(--color-muted); text-decoration: underline; }
footer a:hover { color: var(--color-ink); }
footer a:focus-visible { outline: 0.125rem solid var(--color-ink); outline-offset: 0.125rem; border-radius: 0.125rem; }

/* ── Dialog ── */
dialog {
  background: var(--color-surface);
  color: var(--color-ink); /* override UA 'color: initial' so labels inherit correctly */
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 0;
  width: min(92vw, 25rem);
  max-height: 90dvh;
  overflow-y: auto;
  box-shadow: 0 0.5rem 2.5rem rgba(0,0,0,.14);
  /* Centre in the top-layer */
  position: fixed;
  top: 50%;
  left: 50%;
  margin: 0;
  transform: translate(-50%, -50%);
}
dialog::backdrop {
  background: rgba(15, 23, 42, 0.55);
}
:root[data-contrast="high"] dialog::backdrop {
  background: rgba(0, 0, 0, 0.85);
}
.dialog-inner { padding: 1.5rem 1.5rem 1.25rem; }
.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}
.dialog-title {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01875rem;
}
.dialog-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-muted);
  padding: 0.25rem;
  border-radius: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.dialog-close:hover { color: var(--color-ink); background: var(--color-bg); }
.dialog-close:focus-visible { outline: 0.125rem solid var(--color-ink); outline-offset: 0.125rem; }

/* ── Form ── */
.form-group { margin-bottom: 0.75rem; }
.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}
.form-group input {
  width: 100%;
  padding: 0.5625rem 0.6875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  font-size: 0.875rem;
  color: var(--color-ink);
  background: var(--color-surface);
}
.form-group input:focus {
  outline: 0.125rem solid var(--color-ink);
  outline-offset: 0.0625rem;
}
.form-group input[aria-invalid="true"] { border-color: var(--color-error); }
.form-status {
  min-height: 1rem;
  font-size: 0.8125rem;
  color: var(--color-error);
  margin-top: 0.625rem;
}
.form-status.ok { color: var(--color-success); }
.form-actions { margin-top: 1rem; }

/* ── OTP verify step ── */
.otp-hint {
  font-size: 0.8125rem;
  color: var(--color-muted);
  text-align: center;
  margin-bottom: 0.875rem;
}
.otp-code-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: center;
  margin-bottom: 0.5rem;
}
.otp-boxes {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 0.25rem;
}
.otp-box {
  width: 2.5rem;
  height: 2.875rem;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  background: var(--color-surface);
  color: var(--color-ink);
  transition: border-color 0.15s;
}
.otp-box:focus {
  outline: 0.125rem solid var(--color-ink);
  outline-offset: 0.0625rem;
  border-color: var(--color-ink);
}
.auth-back-btn {
  margin-top: 0.5rem;
  font-size: 0.8125rem;
}

/* ── Turnstile widget: centered in the form ── */
#turnstile-container {
  display: flex;
  justify-content: center;
}

/* ── WCAG: High-contrast theme ── */
:root[data-contrast="high"] {
  --color-bg:      #000000;
  --color-surface: #111111;
  --color-border:  #ffffff;
  --color-ink:     #ffffff;
  --color-muted:   #e2e8f0;
  --color-error:   #ff6b6b;
  --color-success: #69db7c;
}

/* btn-primary hover in high-contrast: ink is #fff so brightness(1.15) is invisible.
   Darken instead and add a prominent outline to signal interactivity. */
:root[data-contrast="high"] .btn-primary:not(:disabled):hover {
  filter: brightness(0.8);
  outline: 0.125rem solid var(--color-border);
  outline-offset: 0.125rem;
}

/* ── WCAG: Font-size steps (all rem values scale with html font-size) ── */
[data-font-size="lg"] { font-size: 1.125rem; }
[data-font-size="xl"] { font-size: 1.25rem; }

/* ── WCAG: Dyslexia-friendly font ── */
[data-font="dyslexia"] body {
  font-family: "Lexend", "OpenDyslexic", system-ui, sans-serif;
}