/* smtp-login-checker — design tokens + layout. Self-hosted font, no third-party requests. */

:root {
  /* Spacing scale (4px base) */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;

  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 880px;

  /* Light palette — dotreflection brand: deep navy-teal ink, muted blue accent */
  --bg: #f1f7f9;
  --bg-elevated: #ffffff;
  --ink: #182834;
  --ink-soft: #41555f;
  --ink-faint: #6a7e88;
  --line: #dde8ec;
  --line-strong: #c5d6dc;

  --accent: #2f6d88;        /* primary button background (white text passes AA) */
  --accent-strong: #25596f; /* button hover */
  --accent-ink: #1f5b75;    /* links, icons, text on the light wash */
  --accent-wash: #e6f1f5;   /* tinted surfaces, chips, focus rings */

  --success: #137a4b;
  --success-wash: #e6f6ee;
  --success-line: #b6e2cb;
  --danger: #b3261e;
  --danger-wash: #fdecea;
  --danger-line: #f3c4bf;
  --warning: #8a5a00;
  --warning-wash: #fdf3e1;

  --shadow-sm: 0 1px 2px rgba(24, 40, 52, 0.06), 0 1px 3px rgba(24, 40, 52, 0.05);
  --shadow-md: 0 4px 14px rgba(24, 40, 52, 0.09), 0 2px 4px rgba(24, 40, 52, 0.05);

  --font: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

/* Self-hosted DM Sans (variable weight, latin). No third-party font requests,
   so the strict CSP and the "nothing leaves your machine" promise both hold. */
@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 100 1000;
  font-display: swap;
  src: url("fonts/dm-sans-latin-wght-normal.woff2") format("woff2");
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1c24;
    --bg-elevated: #182834;   /* brand navy-teal surface */
    --ink: #e7eff2;
    --ink-soft: #a6bcc4;
    --ink-faint: #7c919b;
    --line: #243a47;
    --line-strong: #335160;

    --accent: #3c7f9e;        /* button background (white text) */
    --accent-strong: #336c83; /* button hover */
    --accent-ink: #9fcadb;    /* links and icons on dark surfaces */
    --accent-wash: #16323f;   /* tinted dark surfaces */

    --success: #59d39b;
    --success-wash: #12241c;
    --success-line: #1f4636;
    --danger: #ff7b72;
    --danger-wash: #2a1715;
    --danger-line: #5a2b27;
    --warning: #e6b25e;
    --warning-wash: #2a2113;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--s-5);
}

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--accent-wash);
  color: var(--accent-ink);
  padding: 0.1em 0.4em;
  border-radius: 5px;
}

.visually-hidden,
.skip-link {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.skip-link:focus {
  position: fixed;
  top: var(--s-3); left: var(--s-3);
  width: auto; height: auto;
  padding: var(--s-2) var(--s-4);
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  clip: auto;
  z-index: 10;
}

/* Header ------------------------------------------------------------------ */
.site-header {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s-4);
  padding-bottom: var(--s-4);
}
.brand { display: flex; align-items: center; gap: var(--s-3); }
.brand-mark {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--accent-wash);
  color: var(--accent-ink);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 1rem; letter-spacing: -0.01em; }
.brand-text small { color: var(--ink-faint); font-size: 0.78rem; }

.ghost-link {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 0.875rem;
  color: var(--ink-soft);
  padding: var(--s-2) var(--s-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}
.ghost-link:hover { text-decoration: none; border-color: var(--accent); color: var(--accent-ink); }

/* Hero -------------------------------------------------------------------- */
.hero { padding: var(--s-7) 0 var(--s-5); }
.hero h1 {
  margin: 0 0 var(--s-4);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.lead {
  margin: 0 0 var(--s-6);
  max-width: 64ch;
  font-size: 1.075rem;
  color: var(--ink-soft);
}

/* Launch command ---------------------------------------------------------- */
.launch { margin: 0 0 var(--s-6); }
.launch-label {
  margin: 0 0 var(--s-2);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.command {
  display: flex;
  align-items: stretch;
  gap: var(--s-3);
  background: #13242e;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: var(--s-3) var(--s-3) var(--s-3) var(--s-4);
  box-shadow: var(--shadow-sm);
}
.command code {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.5;
  color: #e6e9f2;
  background: transparent;
  padding: 0;
  overflow-x: auto;
  white-space: nowrap;
  border-radius: 0;
}
.command code::before {
  content: "$";
  color: #6c7793;
  margin-right: 0.7em;
  user-select: none;
}
.copy-cmd {
  flex: none;
  align-self: center;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: #11151f;
  background: #e6e9f2;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
}
.copy-cmd:hover { background: #fff; }
.copy-cmd:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.launch-sub {
  margin: var(--s-3) 0 0;
  font-size: 0.84rem;
  color: var(--ink-faint);
  max-width: 70ch;
}
.launch-sub kbd {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0.05em 0.4em;
  color: var(--ink-soft);
}

.trust {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}
.trust li {
  display: flex;
  gap: var(--s-3);
  padding: var(--s-4);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.trust-icon {
  flex: none;
  display: grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: 9px;
  background: var(--accent-wash);
  color: var(--accent-ink);
}
.trust div { display: flex; flex-direction: column; gap: 2px; }
.trust strong { font-size: 0.95rem; }
/* Scope to the text spans only — a bare ".trust span" also matches .trust-icon
   (which is a <span>) and would override its accent colour, greying the icon. */
.trust div span { font-size: 0.85rem; color: var(--ink-faint); }
.trust code { font-size: 0.8em; }

/* Panels ------------------------------------------------------------------ */
.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: var(--s-6);
  margin: var(--s-5) 0;
}
.panel h2 { margin: 0 0 var(--s-4); font-size: 1.2rem; letter-spacing: -0.01em; }

/* Local vs hosted --------------------------------------------------------- */
/* The form is shown everywhere so the public page looks like the real tool.
   It only performs live checks on 127.0.0.1; on the hosted page a note explains
   that and the submit handlers point visitors to the launch command instead. */
.hosted-note {
  margin: 0 0 var(--s-5);
  padding: var(--s-3) var(--s-4);
  border: 1px solid var(--accent-wash);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent-wash);
  color: var(--ink-soft);
  font-size: 0.86rem;
}
.is-local .hosted-note { display: none; }

/* Public preview: the form is shown for design parity but disabled, since it
   can't run a real check without the local backend. Greyed from first paint
   (boot.js sets .is-local pre-paint); app.js also marks it inert for keyboard. */
html:not(.is-local) #smtp-form {
  opacity: 0.5;
  pointer-events: none;
  filter: grayscale(0.25);
}

/* Form -------------------------------------------------------------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--s-4);
}
.field { display: flex; flex-direction: column; gap: var(--s-2); grid-column: span 6; }
.field-host { grid-column: span 4; }
.field-port { grid-column: span 2; }
.field-security { grid-column: span 3; }
.field-user { grid-column: span 3; }
.field-pass { grid-column: span 6; }

.advanced .field { grid-column: span 2; }

label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
}

/* Style every text-like input (text, email, number, password, …) but not the
   checkbox. Listing types individually previously missed type="email", which
   left the recipient and From fields with the browser's default white box. */
input:not([type="checkbox"]):not([type="radio"]),
select {
  width: 100%;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7488' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}
input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-wash);
}
input::placeholder { color: var(--ink-faint); }

.input-affix { position: relative; display: flex; }
.input-affix input { padding-right: 4rem; }
.affix-btn {
  position: absolute;
  right: 6px; top: 50%;
  transform: translateY(-50%);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-ink);
  background: transparent;
  border: 0;
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
}
.affix-btn:hover { background: var(--accent-wash); }

.field-checkbox { justify-content: flex-start; }
.checkbox {
  display: flex; align-items: center; gap: var(--s-2);
  font-weight: 500; color: var(--ink);
  cursor: pointer;
}
.checkbox input { width: 17px; height: 17px; accent-color: var(--accent); }
.hint { margin: var(--s-1) 0 0; font-size: 0.78rem; color: var(--ink-faint); }
.label-optional {
  font-weight: 600;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.1em 0.5em;
  line-height: 1.5;
}

/* The optional "send a test email" row, separated from the credentials above. */
.field-to {
  grid-column: span 6;
  margin-top: var(--s-2);
  padding-top: var(--s-5);
  border-top: 1px solid var(--line);
}
.field-to > label {
  display: flex;
  align-items: center;
  gap: var(--s-2);
}

.advanced {
  margin-top: var(--s-5);
  border-top: 1px solid var(--line);
  padding-top: var(--s-4);
}
.advanced summary {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  list-style: none;
  display: inline-flex; align-items: center; gap: var(--s-2);
}
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before {
  content: "";
  width: 0; height: 0;
  border-left: 5px solid currentColor;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform 0.15s;
}
.advanced[open] summary::before { transform: rotate(90deg); }
.advanced .grid { margin-top: var(--s-4); }

.actions {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  margin-top: var(--s-5);
  flex-wrap: wrap;
}
.actions-note { margin: 0; flex: 1 1 100%; font-size: 0.82rem; color: var(--ink-faint); }

.primary {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font: inherit; font-weight: 600; font-size: 0.95rem;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: var(--radius-sm);
  padding: 0.7rem 1.4rem;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
.primary:hover { background: var(--accent-strong); }
.primary:active { transform: translateY(1px); }
.primary:focus-visible { outline: 3px solid var(--accent-wash); outline-offset: 2px; }
.primary[disabled] { opacity: 0.7; cursor: progress; }

.spinner {
  display: none;
  width: 15px; height: 15px;
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.is-busy .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }

/* Result ------------------------------------------------------------------ */
.result-header { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); flex-wrap: wrap; }
.result-header h2 { margin: 0; }
.result-actions { display: flex; gap: var(--s-2); }
.ghost-btn {
  font: inherit; font-size: 0.82rem; font-weight: 600;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}
.ghost-btn:hover { border-color: var(--accent); color: var(--accent-ink); }

.status-banner {
  margin: var(--s-4) 0;
  padding: var(--s-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  display: flex; gap: var(--s-3); align-items: flex-start;
  font-size: 0.95rem;
}
.status-banner .status-title { font-weight: 700; display: block; }
.status-banner.success { background: var(--success-wash); border-color: var(--success-line); color: var(--success); }
.status-banner.failure { background: var(--danger-wash); border-color: var(--danger-line); color: var(--danger); }
.status-banner.info { background: var(--accent-wash); border-color: var(--accent-wash); color: var(--accent-ink); }
.status-banner .status-detail { color: var(--ink-soft); font-weight: 400; }
.status-banner.success .status-detail,
.status-banner.failure .status-detail { color: inherit; opacity: 0.9; }

.capabilities { margin-bottom: var(--s-4); display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: center; }
.cap-label { font-size: 0.8rem; color: var(--ink-faint); margin-right: var(--s-1); }
.chip {
  font-size: 0.76rem;
  font-family: var(--mono);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}
.chip.on { background: var(--success-wash); border-color: var(--success-line); color: var(--success); }

.transcript-heading { margin: var(--s-5) 0 var(--s-1); font-size: 0.95rem; }
.transcript-note { margin: 0 0 var(--s-3); font-size: 0.8rem; color: var(--ink-faint); }
.transcript {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.6;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: var(--s-4);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.transcript .ln { display: block; }
.transcript .ln-send { color: var(--accent-ink); }
.transcript .ln-recv { color: var(--ink); }
.transcript .ln-info { color: var(--ink-faint); }
.transcript .ln-warn { color: var(--warning); }
.transcript .ln-error { color: var(--danger); font-weight: 600; }
.transcript .tag { opacity: 0.6; user-select: none; }

/* Explainer + footer ------------------------------------------------------ */
.explainer p { color: var(--ink-soft); margin: 0 0 var(--s-3); max-width: 70ch; }
.explainer p:last-child { margin-bottom: 0; }

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: var(--s-7);
  padding: var(--s-6) 0 var(--s-7);
}
.footer-inner p { margin: 0 0 var(--s-2); font-size: 0.9rem; color: var(--ink-soft); }
.footer-inner .muted { font-size: 0.82rem; color: var(--ink-faint); }

/* Responsive -------------------------------------------------------------- */
@media (max-width: 720px) {
  .trust { grid-template-columns: 1fr; }
  .field-host, .field-port, .field-security, .field-user, .field-pass,
  .advanced .field { grid-column: span 6; }
  .panel { padding: var(--s-5); }
}