/* ============================================================
   Fairmount Street Partners — Signature Generator
   Brand palette per Complete Brand Guidelines
   ============================================================ */
:root {
  --pale-green:     #f9fdf7;
  --brownish-gray:  #ad997f;
  --polished-stone: #ddc4a8;
  --dark-mauve:     #2d2125;
  --graphite:       #6e7180;

  --surface:        #ffffff;
  --line:           #e7e1d8;
  --ink:            #2d2125;
  --muted:          #6e7180;

  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(45,33,37,.06), 0 1px 3px rgba(45,33,37,.04);
  --shadow-md: 0 18px 40px -22px rgba(45,33,37,.45);
}

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

html, body { height: 100%; }

body {
  margin: 0;
  font-family: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--pale-green);
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 28px;
  background: var(--dark-mauve);
}
.topbar__logo { height: 26px; width: auto; display: block; }
.topbar__tag {
  margin-left: auto;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--polished-stone);
}

/* ---------- Layout ---------- */
.layout {
  max-width: 1120px;
  margin: 0 auto;
  padding: 36px 28px 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

/* ---------- Form panel ---------- */
.form-panel,
.preview-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 28px;
}

.panel-head,
.preview-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 22px;
  gap: 12px;
}
.panel-head h1,
.preview-head h2 {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.dark-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.dark-toggle::before {
  content: "☀";
  font-size: 13px;
}
.dark-toggle:hover {
  border-color: var(--brownish-gray);
  color: var(--ink);
}
.dark-toggle.is-dark {
  background: var(--dark-mauve);
  color: #e8dfd6;
  border-color: var(--dark-mauve);
}
.dark-toggle.is-dark::before {
  content: "◑";
}

.linkbtn {
  border: 0;
  background: none;
  padding: 0;
  font: inherit;
  font-size: 13px;
  color: var(--brownish-gray);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  letter-spacing: 0;
}
.linkbtn:hover { color: var(--dark-mauve); }

/* ---------- Fields ---------- */
.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }

.field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 7px;
}
.hint {
  display: block;
  font-weight: 400;
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
  letter-spacing: 0;
}

.field input {
  width: 100%;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  padding: 11px 13px;
  background: #fcfbf9;
  border: 1px solid var(--line);
  border-radius: 5px;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.field input::placeholder { color: #b7b2aa; }
.field input:focus {
  outline: none;
  background: #fff;
  border-color: var(--brownish-gray);
  box-shadow: 0 0 0 3px rgba(221,196,168,.35);
}

.field select {
  width: 100%;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  padding: 11px 13px;
  background: #fcfbf9;
  border: 1px solid var(--line);
  border-radius: 5px;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.field select:focus {
  outline: none;
  background: #fff;
  border-color: var(--brownish-gray);
  box-shadow: 0 0 0 3px rgba(221,196,168,.35);
}

/* ---------- Phone field group ---------- */
.field-group { margin-bottom: 18px; }
.field-group__label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 9px;
}
.field-group__label .hint {
  display: inline;
  margin: 0 0 0 6px;
  font-size: 11px;
}
.field--inline {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 9px;
}
.field--inline:last-child { margin-bottom: 0; }
.field--inline input { flex: 1 1 auto; }
.suffix-tag {
  flex: 0 0 auto;
  width: 52px;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0;
}

/* ---------- Preview ---------- */
.preview-panel { position: sticky; top: 24px; }

.preview-frame {
  border: 1px solid var(--line);
  border-radius: 5px;
  overflow: hidden;
  background:
    repeating-conic-gradient(#f6f4f1 0% 25%, #fff 0% 50%) 0 / 18px 18px;
  transition: background .2s ease;
}
.preview-frame.is-dark {
  background: #1c1c1e;
}
.preview-frame iframe {
  display: block;
  width: 100%;
  min-height: 230px;
  border: 0;
  background: transparent;
}

/* ---------- Actions ---------- */
.actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.btn {
  flex: 1 1 auto;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  padding: 12px 16px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .08s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--dark-mauve);
  color: var(--pale-green);
}
.btn--primary:hover { background: #3b2c31; }

.btn--ghost {
  background: #fff;
  color: var(--dark-mauve);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--brownish-gray); background: #fcfbf9; }

.status {
  min-height: 18px;
  margin: 12px 2px 0;
  font-size: 13px;
  color: var(--brownish-gray);
}
.status.is-error { color: #b4453a; }

/* ---------- Help ---------- */
.help {
  margin-top: 22px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  font-size: 13px;
  color: var(--muted);
}
.help summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--ink);
  list-style-position: inside;
}
.help ol { margin: 12px 0 8px; padding-left: 18px; line-height: 1.6; }
.help li { margin-bottom: 6px; }
.help code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 12px;
  background: #f4f1ec;
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--dark-mauve);
}

/* ---------- Footer ---------- */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}
.site-footer p { margin: 0; }
.site-footer a { color: var(--muted); text-decoration: underline; }
.site-footer a:hover { color: var(--ink); }

/* ============================================================
   BREAKPOINT 1 — DESKTOP is the default above.
   BREAKPOINT 2 — MOBILE (<= 768px)
   ============================================================ */
@media (max-width: 768px) {
  .topbar { padding: 14px 18px; }
  .topbar__tag { display: none; }

  .layout {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 22px 16px 48px;
  }

  .form-panel,
  .preview-panel { padding: 22px; }

  /* Preview drops below the form on mobile; no sticky */
  .preview-panel { position: static; top: auto; }

  .actions { flex-direction: column; }
  .btn { flex: 1 1 100%; }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}