/* =====================================================================
   SleepyDesk waitlist site. Components of the design system v1.
   Rules: colours ONLY through tokens.css variables; logical properties
   only (margin-inline, padding-block, inset-inline...) so dir="rtl" works.
   Documentation: docs/design/design-system.md
   ===================================================================== */

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-block-start: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-body);
  color: var(--color-text);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--color-link); text-underline-offset: 3px; }
p { margin-block: 0 var(--space-4); }

h1, h2, h3 { margin-block: 0 var(--space-3); line-height: var(--leading-tight); }
h1, h2 { font-family: var(--font-display); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-heading); }
h1 { font-size: var(--text-h1-fluid); }
h2 { font-size: var(--text-h2-fluid); }
h3 { font-size: var(--text-lg); font-weight: var(--weight-semibold); line-height: 1.3; }

:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }

.visually-hidden {
  position: absolute; inline-size: 1px; block-size: 1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* ---------- Layout ---------- */
.wrap { inline-size: 100%; max-inline-size: 1120px; margin-inline: auto; padding-inline: var(--space-5); }
.wrap--narrow { max-inline-size: 640px; }
.wrap--text { max-inline-size: 760px; }

.section { padding-block: var(--space-9); }
.section--paper { background: var(--paper); }
.section--brand { background: var(--color-surface-brand); color: var(--color-text-on-brand); }
.section--tight { padding-block: var(--space-7); }

/* Marketing sections: centred heading. Text pages (privacy): start-aligned. */
.section-head { text-align: center; max-inline-size: 40rem; margin-inline: auto; margin-block-end: var(--space-7); }
.section-head p { color: var(--color-text-secondary); margin: 0; }
.section--brand .section-head p { color: var(--color-text-on-brand-secondary); }

.eyebrow {
  margin-block-end: var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: var(--color-text-accent);
}
.on-brand .eyebrow { color: var(--moon-300); } /* gold on navy 11.26 */
:lang(ar) .eyebrow { text-transform: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-block-size: 48px;
  padding-block: var(--space-3);
  padding-inline: var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font: inherit;
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-calm),
              border-color var(--duration-fast) var(--ease-calm),
              transform var(--duration-fast) var(--ease-calm);
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.6; cursor: not-allowed; transform: none; }

/* Accent (gold): ONE per screen, on navy only. Night 900 on gold 11.26, on hover 9.63 */
.btn--accent { background: var(--btn-accent-bg); color: var(--btn-accent-text); }
.btn--accent:hover { background: var(--btn-accent-bg-hover); }
.btn--accent:focus-visible { box-shadow: 0 0 0 3px var(--color-surface-brand), 0 0 0 5px var(--color-focus-on-brand); }

/* Primary (navy): default action on light backgrounds. White on night-900 17.83, hover night-700 13.20 */
.btn--primary { background: var(--btn-primary-bg); color: var(--btn-primary-text); }
.btn--primary:hover { background: var(--btn-primary-bg-hover); }

/* Secondary: outline. On light: ink text + strong border. On navy: white text + #5f6b9e border (3.47) */
.btn--secondary { background: transparent; color: var(--color-text); border-color: var(--color-border-strong); }
.btn--secondary:hover { background: var(--color-surface-muted); }
.on-brand .btn--secondary { color: var(--color-text-on-brand); border-color: var(--color-border-on-brand-strong); }
.on-brand .btn--secondary:hover { background: var(--color-surface-brand-2); border-color: var(--color-text-on-brand-secondary); }
.on-brand .btn--secondary:focus-visible,
.on-brand .btn--link:focus-visible { box-shadow: none; outline: 2px solid var(--color-focus-on-brand); outline-offset: 2px; }

.btn--small { min-block-size: 44px; padding-inline: var(--space-4); font-size: var(--text-sm); }
.btn--block { inline-size: 100%; }

/* Link button: text with underline, still 44 px tall for touch */
.btn--link {
  min-block-size: 44px; padding-inline: var(--space-1);
  background: none; border: 0; border-radius: var(--radius-sm);
  color: var(--color-link); text-decoration: underline; text-underline-offset: 4px;
}
.on-brand .btn--link { color: var(--color-text-on-brand); }
.btn--link:hover { text-decoration-thickness: 2px; }

.cta-row { display: flex; justify-content: center; margin-block-start: var(--space-7); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; inset-block-start: 0; z-index: 10;
  background: var(--color-surface-brand);
  border-block-end: 1px solid var(--color-border-on-brand);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); min-block-size: 68px; }
.lang-switch { display: inline-flex; border: 1px solid var(--color-border-on-brand-strong); border-radius: var(--radius-full); overflow: hidden; margin-inline-start: auto; margin-inline-end: var(--space-4); }
.lang-switch a { display: inline-flex; align-items: center; min-block-size: 36px; min-inline-size: 44px; justify-content: center; padding: 0 var(--space-3); color: var(--color-text-on-brand-secondary); text-decoration: none; font-size: var(--text-sm); font-weight: var(--weight-semibold); }
.lang-switch a:hover { color: var(--color-text-on-brand); }
.lang-switch a[aria-current] { background: var(--color-text-on-brand); color: var(--night-900); }
.site-header__actions { display: flex; align-items: center; gap: var(--space-4); }
.site-header__link { color: var(--color-text-on-brand); text-decoration: none; font-weight: var(--weight-medium); min-block-size: 44px; display: inline-flex; align-items: center; }
.site-header__link:hover { text-decoration: underline; text-underline-offset: 4px; }
.brand { display: inline-flex; align-items: center; min-block-size: 44px; border-radius: var(--radius-sm); }
.brand img { block-size: 30px; inline-size: auto; }
.brand:focus-visible { outline-color: var(--color-focus-on-brand); }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1100px 520px at 85% -10%, var(--color-hero-glow) 0%, transparent 62%),
    var(--color-surface-brand);
  color: var(--color-text-on-brand);
  padding-block: var(--space-8) var(--space-9);
}
.hero__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-8); align-items: center; }
.hero h1 { margin-block-end: var(--space-5); }
.lead { font-size: var(--text-lg); line-height: 1.5; max-inline-size: 34em; }
.hero .lead { color: var(--color-text-on-brand-secondary); }

.offer {
  display: flex; align-items: flex-start; gap: var(--space-3);
  max-inline-size: 34em;
  margin-block: var(--space-5) 0;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-brand-2);
  border: 1px solid var(--color-border-on-brand);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-on-brand);
}
.offer svg { flex: none; inline-size: 20px; block-size: 20px; margin-block-start: 2px; color: var(--color-text-on-brand-secondary); }
.offer strong { font-weight: var(--weight-semibold); }

.hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-5); margin-block-start: var(--space-6); }

/* ---------- Phone mockup (patient view: clinic branding only, never SleepyDesk colours) ---------- */
.mockup { margin: 0; justify-self: center; inline-size: 100%; max-inline-size: 380px; }
.phone {
  background: var(--wa-bg);
  color: var(--color-text);
  border: 8px solid var(--wa-frame);
  border-radius: 30px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.phone__head { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); background: var(--wa-head); color: var(--wa-head-text); }
.phone__head strong { display: block; font-size: var(--text-sm); line-height: 1.3; }
.phone__head small { display: block; font-size: var(--text-xs); }
.avatar {
  flex: none; inline-size: 36px; block-size: 36px; border-radius: var(--radius-full);
  display: grid; place-items: center;
  background: var(--neutral-100); color: var(--neutral-900); /* 13.91 */
  font-weight: var(--weight-semibold); font-size: var(--text-sm);
}
.chat { display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-4) var(--space-3) var(--space-5); font-size: var(--text-sm); line-height: 1.45; }
.chat__time { align-self: center; margin: 0 0 var(--space-1); padding: 2px var(--space-3); background: var(--wa-in); border-radius: var(--radius-sm); font-size: var(--text-xs); color: var(--color-text-secondary); }
.msg { margin: 0; padding: var(--space-2) var(--space-3); max-inline-size: 85%; border-radius: var(--radius-md); box-shadow: var(--shadow-xs); }
.msg--in  { align-self: flex-start; background: var(--wa-in);  border-start-start-radius: 2px; }
.msg--out { align-self: flex-end;   background: var(--wa-out); border-start-end-radius: 2px; }
.mockup figcaption { margin-block-start: var(--space-3); text-align: center; font-size: var(--text-sm); color: var(--color-text-on-brand-secondary); }

/* ---------- Benefit band ---------- */
.band { background: var(--color-surface-brand-2); color: var(--color-text-on-brand); padding-block: var(--space-6); }
.benefits { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.benefits li { display: flex; gap: var(--space-3); align-items: flex-start; }
.benefits svg { flex: none; inline-size: 24px; block-size: 24px; color: var(--color-text-on-brand-secondary); margin-block-start: 2px; }
.benefits strong { display: block; font-weight: var(--weight-semibold); line-height: var(--leading-snug); }
.benefits span { display: block; font-size: var(--text-base); line-height: 1.5; color: var(--color-text-on-brand-secondary); }

/* ---------- Card (single card style for the whole system) ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  padding: var(--space-5);
}
.card p { color: var(--color-text-secondary); margin: 0; }

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.step-num {
  display: inline-grid; place-items: center;
  inline-size: 36px; block-size: 36px; margin-block-end: var(--space-4);
  border-radius: var(--radius-full);
  background: var(--night-900); color: var(--color-text-on-brand); /* 17.83 */
  font-weight: var(--weight-semibold); font-size: var(--text-base);
}

/* Features: 3 key cards + 3 secondary items */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.feature-icon {
  display: grid; place-items: center;
  inline-size: 44px; block-size: 44px; margin-block-end: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--night-50); color: var(--night-600); /* icon 9.50:1 */
}
.feature-icon svg { inline-size: 24px; block-size: 24px; }
.features-more {
  list-style: none; margin: var(--space-6) 0 0; padding: var(--space-6) 0 0;
  border-block-start: 1px solid var(--color-border);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5);
}
.features-more li { display: flex; gap: var(--space-3); align-items: flex-start; }
.features-more svg { flex: none; inline-size: 20px; block-size: 20px; margin-block-start: 3px; color: var(--night-600); }
.features-more h3 { font-size: var(--text-md); margin-block-end: var(--space-1); }
.features-more p { margin: 0; font-size: var(--text-base); color: var(--color-text-secondary); } /* 5.59 on paper */

/* ---------- Trust ---------- */
.trust {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5);
}
.trust li { display: flex; gap: var(--space-3); align-items: center; font-weight: var(--weight-medium); line-height: var(--leading-snug); }
.trust .feature-icon { flex: none; margin: 0; }

/* Founder block: ready for when it is approved (currently commented out in index.html) */
.founder { display: flex; gap: var(--space-5); align-items: flex-start; max-inline-size: 760px; margin-inline: auto; margin-block-end: var(--space-7); }
.founder img { flex: none; inline-size: 88px; block-size: 88px; border-radius: var(--radius-full); object-fit: cover; }
.founder p { color: var(--color-text-secondary); }

/* ---------- FAQ accordion ---------- */
.faq details { border-block-end: 1px solid var(--color-border); }
.faq details:first-of-type { border-block-start: 1px solid var(--color-border); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  min-block-size: 56px; padding-block: var(--space-3);
  font-weight: var(--weight-semibold); line-height: var(--leading-snug);
  cursor: pointer; list-style: none; border-radius: var(--radius-sm);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none;
  inline-size: 10px; block-size: 10px; margin-inline-end: var(--space-2);
  border-inline-end: 2px solid currentColor; border-block-end: 2px solid currentColor;
  transform: rotate(45deg) translateY(-3px);
  transition: transform var(--duration-base) var(--ease-calm);
  color: var(--color-text-secondary);
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-3px); }
.faq summary:hover { color: var(--color-link); }
.faq summary:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.faq details p { margin: 0; padding-block-end: var(--space-5); color: var(--color-text-secondary); max-inline-size: 60ch; }

/* ---------- Form ---------- */
.signup .lead { color: var(--color-text-on-brand-secondary); margin-inline: auto; text-align: center; }
.form-card {
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
}
.field { display: flex; flex-direction: column; gap: var(--space-2); margin-block-end: var(--space-5); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.field label { font-size: var(--text-sm); font-weight: var(--weight-medium); line-height: var(--leading-snug); }
.field .optional { font-weight: var(--weight-regular); color: var(--color-text-secondary); }
.field .hint { margin: 0; font-size: var(--text-sm); line-height: 1.4; color: var(--color-text-secondary); } /* 6.09 */

.input {
  inline-size: 100%;
  min-block-size: 48px;
  padding-block: var(--space-3);
  padding-inline: var(--space-4);
  font: inherit;
  font-size: var(--text-base); /* 16 px: no zoom on iOS */
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong); /* 3.31 */
  border-radius: var(--radius-md);
  transition: border-color var(--duration-fast) var(--ease-calm), box-shadow var(--duration-fast) var(--ease-calm);
}
.input::placeholder { color: var(--color-text-subtle); }
.input:hover { border-color: var(--color-text-secondary); }
.input:focus { outline: none; border-color: var(--color-focus); box-shadow: var(--shadow-focus); }
.input[aria-invalid="true"] { border-color: var(--error); box-shadow: 0 0 0 1px var(--error); }
.input:disabled { background: var(--color-surface-muted); color: var(--color-text-secondary); cursor: not-allowed; }

select.input {
  appearance: none;
  padding-inline-end: var(--space-7);
  background-image: linear-gradient(45deg, transparent 50%, var(--color-text-secondary) 50%),
                    linear-gradient(135deg, var(--color-text-secondary) 50%, transparent 50%);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  background-position: right 22px center, right 16px center;
}
[dir="rtl"] select.input { background-position: left 16px center, left 22px center; }

.hp { position: absolute; inset-inline-start: -9999px; inline-size: 1px; block-size: 1px; overflow: hidden; }

.form-msg { margin: var(--space-4) 0 0; font-size: var(--text-base); font-weight: var(--weight-medium); text-align: center; }
.form-msg:empty { display: none; }
.form-msg.ok  { padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); background: var(--success-bg); color: var(--success); } /* 4.73 */
.form-msg.err { padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); background: var(--error-bg);   color: var(--error); }   /* 5.75 */
.fine { margin: var(--space-4) 0 0; font-size: var(--text-sm); line-height: 1.45; text-align: center; color: var(--color-text-secondary); }

/* ---------- Badges (system component; status pills for dashboard later) ---------- */
.badge {
  display: inline-flex; align-items: center; gap: var(--space-1);
  padding: 2px var(--space-2); border-radius: var(--radius-full);
  font-size: var(--text-xs); font-weight: var(--weight-semibold); line-height: 1.5;
  background: var(--info-bg); color: var(--info);
}
.badge--success { background: var(--success-bg); color: var(--success); }
.badge--warning { background: var(--warning-bg); color: var(--warning); }
.badge--error   { background: var(--error-bg);   color: var(--error); }
.on-brand .badge { background: var(--color-surface-brand-2); color: var(--color-text-on-brand); border: 1px solid var(--color-border-on-brand); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-surface-footer); color: var(--color-text-on-brand-secondary); padding-block: var(--space-5); font-size: var(--text-sm); }
.site-footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 0 var(--space-5); }
.site-footer a { display: inline-flex; align-items: center; min-block-size: 44px; color: var(--color-text-on-brand); }
.site-footer a:focus-visible { outline-color: var(--color-focus-on-brand); }

/* ---------- Text pages (privacy) ---------- */
.prose { padding-block: var(--space-8); }
.prose h1 { font-size: var(--text-3xl); }
.prose h2 { font-family: var(--font-body); font-size: var(--text-lg); letter-spacing: 0; margin-block: var(--space-6) var(--space-2); }
.prose p, .prose li { color: var(--color-text); }
.prose .meta { color: var(--color-text-secondary); font-size: var(--text-sm); }
.prose ul { padding-inline-start: var(--space-5); margin-block: 0 var(--space-4); }
.prose li { margin-block-end: var(--space-1); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .section { padding-block: var(--space-8); }
  .hero { padding-block: var(--space-7) var(--space-8); }
  .hero__grid { grid-template-columns: 1fr; gap: var(--space-7); }
  .steps, .features, .features-more, .trust { grid-template-columns: 1fr; }
  .benefits { grid-template-columns: 1fr; gap: var(--space-4); }
}
@media (max-width: 560px) {
  body { font-size: var(--text-base); }
  .wrap { padding-inline: var(--space-4); }
  .section { padding-block: var(--space-7); }
  .section-head { margin-block-end: var(--space-6); }
  .lead { font-size: var(--text-md); }
  .brand img { block-size: 28px; }
  .site-header .btn--small { padding-inline: var(--space-3); }
  .hero__actions .btn--accent { inline-size: 100%; }
  .hero__actions { justify-content: center; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .form-card { padding: var(--space-5); }
  .card { padding: var(--space-5) var(--space-4); }
}

/* Small screens: logo, language switch and "Get started" only; "Sign in" moves to the footer. */
.brand { flex-shrink: 0; }
@media (max-width: 560px) {
  .site-header__link { display: none; }
  .site-header__inner { gap: var(--space-2); }
  .lang-switch { margin-inline-end: 0; }
  .lang-switch a { min-inline-size: 40px; padding: 0 var(--space-2); }
  .site-header__actions .btn--small { padding-inline: var(--space-3); }
}