/* ─────────────────────────────────────────────────────
   hubits-support — minimalist intake form
   Reference: District 2 (DI.−2) Saigon, contact page
   Mobile-first; desktop is graceful enhancement.
   ───────────────────────────────────────────────────── */

:root {
  --bg:        #f5f5f5;
  --text:      #111111;
  --muted:     #888888;
  --rule:      #d0d0d0;
  --rule-active: #111111;
  --error:     #b00020;
  --max-w:     1200px;
  --gutter:    1.5rem;       /* 24px */
  --gutter-lg: 4rem;         /* 64px on desktop */
  --field-h:   2.75rem;      /* 44px — Apple HIG min touch target */
  --t-fast:    120ms ease;
  --t-base:    240ms ease;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ── topbar ─────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem var(--gutter);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}
.brand {
  text-decoration: none;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.topbar-nav { display: flex; gap: 1rem; }
.topbar-section {
  text-transform: lowercase;
  color: var(--muted);
}

/* ── page layout ─────────────────────────────────────── */
.page {
  flex: 1 0 auto;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem var(--gutter) 4rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 768px) {
  .page {
    grid-template-columns: 1fr 1fr;
    column-gap: var(--gutter-lg);
    padding: 4rem var(--gutter-lg) 6rem;
    align-items: start;
  }
}

/* ── hero (left column on desktop, top on mobile) ────── */
.hero { padding-top: 1rem; }
.hero-title {
  font-size: 2.25rem;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}
@media (min-width: 768px) {
  .hero-title { font-size: 3.5rem; }
}
.hero-lead {
  font-size: 1rem;
  color: var(--text);
  max-width: 28rem;
  margin: 0 0 1rem;
}
.hero-meta {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 0;
}

/* ── form ────────────────────────────────────────────── */
.form-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  color: var(--muted);
  margin: 0 0 1.5rem;
}
@media (max-width: 767.98px) {
  .form-heading { display: none; }
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.field { display: flex; flex-direction: column; }

.field label {
  font-size: 0.6875rem;     /* 11px */
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.field input,
.field textarea {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  border-radius: 0;
  padding: 0.625rem 0;
  min-height: var(--field-h);
  font: inherit;
  color: var(--text);
  width: 100%;
  outline: none;
  transition: border-color var(--t-fast);
}
.field textarea {
  resize: vertical;
  min-height: 5rem;
  line-height: 1.5;
}
.field input::placeholder,
.field textarea::placeholder {
  color: var(--muted);
}

.field input:focus,
.field textarea:focus {
  border-bottom-color: var(--rule-active);
}

.field input:invalid:not(:placeholder-shown),
.field textarea:invalid:not(:placeholder-shown) {
  border-bottom-color: var(--error);
}

/* ── file upload ────────────────────────────────────── */
.field-file { position: relative; }
.field-file input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}
.file-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--rule);
  padding: 0.625rem 0;
  min-height: var(--field-h);
  cursor: pointer;
  transition: border-color var(--t-fast);
}
.file-label-text {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--muted);
}
.muted { color: var(--muted); font-weight: 400; }
.file-cta {
  font-size: 0.875rem;
  color: var(--text);
}
.field-file:focus-within .file-label,
.field-file:hover .file-label {
  border-bottom-color: var(--rule-active);
}
.file-name {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
  word-break: break-all;
}

/* ── submit ─────────────────────────────────────────── */
.field-actions {
  margin-top: 0.5rem;
}
.submit {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: none;
  padding: 0.75rem 0;
  font: inherit;
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  border-bottom: 1px solid var(--text);
  text-transform: lowercase;
  letter-spacing: 0.02em;
  transition: gap var(--t-base);
  width: 100%;
  justify-content: flex-start;
}
@media (min-width: 768px) {
  .submit { width: auto; }
}
.submit:hover { gap: 1rem; }
.submit:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 4px;
}
.submit[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}
.submit-arrow { transition: transform var(--t-base); }

/* ── error ─────────────────────────────────────────── */
.form-error {
  margin: 0;
  font-size: 0.875rem;
  color: var(--error);
}

/* ── thanks page ───────────────────────────────────── */
.page-thanks { max-width: 36rem; }
@media (min-width: 768px) {
  .page-thanks { grid-template-columns: 1fr; }
}
.thanks-ref {
  margin: 2rem 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}
.thanks-ref-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--muted);
}
.thanks-ref-value {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.04em;
}
.thanks-actions {
  margin-top: 2.5rem;
}
.thanks-back {
  text-decoration: none;
  border-bottom: 1px solid var(--text);
  padding-bottom: 0.125rem;
}

/* ── honeypot (off-screen, never visible) ───────────── */
.hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ── bottombar ──────────────────────────────────────── */
.bottombar {
  padding: 1.5rem var(--gutter);
  font-size: 0.75rem;
  color: var(--muted);
  text-align: left;
}
@media (min-width: 768px) {
  .bottombar { padding-left: var(--gutter-lg); padding-right: var(--gutter-lg); }
}

/* ── reduced motion ─────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}