:root {
  --bg-from: #fffaf0;
  --bg-to: #fdecc8;
  --blob: rgba(180, 83, 9, 0.10);
  --glass: rgba(255, 255, 255, 0.65);
  --glass-strong: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.7);
  --glass-shadow: 0 10px 40px rgba(180, 83, 9, 0.08), 0 2px 10px rgba(180, 83, 9, 0.04);
  --accent: #b45309;
  --accent-hover: #92400e;
  --accent-soft: rgba(180, 83, 9, 0.08);
  --accent-glow: 0 0 0 4px rgba(180, 83, 9, 0.15);
  --ink: #1c1c1c;
  --muted: #7a6350;
  --border: rgba(180, 83, 9, 0.14);
  --success: #166534;
  --success-bg: rgba(34, 197, 94, 0.14);
  --success-border: rgba(34, 197, 94, 0.32);
  --err: #b00020;
  --input-bg: rgba(255, 255, 255, 0.6);
  --input-bg-focus: rgba(255, 255, 255, 0.95);
  --button-hover-bg: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] {
  --bg-from: #1a1206;
  --bg-to: #2a1d0c;
  --blob: rgba(217, 158, 92, 0.16);
  --glass: rgba(255, 255, 255, 0.06);
  --glass-strong: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.14);
  --glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.45), 0 2px 10px rgba(0, 0, 0, 0.2);
  --accent: #e0a850;
  --accent-hover: #cf9640;
  --accent-soft: rgba(224, 168, 80, 0.15);
  --accent-glow: 0 0 0 4px rgba(224, 168, 80, 0.22);
  --ink: #f5ece0;
  --muted: #b8a690;
  --border: rgba(255, 255, 255, 0.14);
  --success: #4ade80;
  --success-bg: rgba(34, 197, 94, 0.18);
  --success-border: rgba(34, 197, 94, 0.38);
  --err: #f87171;
  --input-bg: rgba(255, 255, 255, 0.05);
  --input-bg-focus: rgba(255, 255, 255, 0.1);
  --button-hover-bg: rgba(255, 255, 255, 0.18);
}

* { box-sizing: border-box; }

body {
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Arial, sans-serif;
  color: var(--ink);
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--bg-from), var(--bg-to)) fixed;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -20%;
  right: -15%;
  width: 60vw;
  height: 60vw;
  background: var(--blob);
  border-radius: 50%;
  filter: blur(100px);
  z-index: 0;
  pointer-events: none;
}

header {
  position: relative;
  z-index: 1;
  padding: 22px 32px;
  background: var(--glass-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-weight: 700;
  letter-spacing: 0.4px;
}
.brand-mark { color: var(--accent); font-size: 18px; }
.brand-name { color: var(--accent); }
.brand-name .muted { color: var(--ink); font-weight: 400; }
.brand-sub { color: var(--muted); font-size: 13px; }

main.card {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 36px auto;
  background: var(--glass);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 32px;
  box-shadow: var(--glass-shadow);
}

h2 { margin: 0 0 6px; font-weight: 700; }
h3 { margin: 22px 0 8px; color: var(--accent); font-weight: 600; }
p.muted { color: var(--muted); margin: 4px 0 18px; }

.dash-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}
.whoami { font-size: 12px; color: var(--muted); }
.whoami strong { color: var(--accent); }
.whoami a { color: var(--muted); text-decoration: underline; }
.whoami a:hover { color: var(--accent); }

label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.7px;
  color: var(--muted);
  margin: 18px 0 4px;
  font-weight: 600;
  text-transform: uppercase;
}

input[type="password"], input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  background: var(--input-bg);
  margin-top: 6px;
  transition: all 0.18s ease;
  color: var(--ink);
}
input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--input-bg-focus);
  box-shadow: var(--accent-glow);
}

button {
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--glass-strong);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.18s ease;
  color: var(--ink);
  font-family: inherit;
}
button:hover {
  background: var(--button-hover-bg);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}
button:active { transform: translateY(0); }

button.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}
button.primary:hover { background: var(--accent-hover); box-shadow: 0 8px 22px rgba(180, 83, 9, 0.28); }
button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

button.copied {
  animation: copy-pulse 0.55s ease-out;
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
}
@keyframes copy-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.06); }
  100% { transform: scale(1); }
}

.row { display: flex; gap: 12px; margin-top: 16px; flex-wrap: wrap; align-items: center; }
.row.gap { margin: 18px 0; }
.err { color: var(--err); font-size: 13px; margin-top: 8px; min-height: 1em; }
.hidden { display: none !important; }

details.advanced { margin-top: 8px; }
details.advanced summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.4px;
  padding: 8px 0;
  list-style: none;
  user-select: none;
}
details.advanced summary::-webkit-details-marker { display: none; }
details.advanced summary::before { content: '⚙  '; opacity: 0.8; }
details.advanced[open] summary { color: var(--accent); }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
  min-height: 28px;
}
.status-pill:empty { display: none; }
.status-pill.success { background: var(--success-bg); color: var(--success); border-color: var(--success-border); }
.status-pill.error { background: rgba(176, 0, 32, 0.12); color: var(--err); border-color: rgba(176, 0, 32, 0.32); }

.spinner {
  width: 13px;
  height: 13px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.preview-wrap {
  margin-top: 16px;
  padding: 12px;
  background: var(--glass);
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  box-shadow: 0 6px 24px rgba(0,0,0,0.06);
}
.preview-header {
  max-width: 900px;
  margin: 0 auto 10px;
  padding: 10px 14px;
  background: var(--glass-strong);
  border-radius: 8px;
  border: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
}
.preview-header:empty { display: none; }
.preview-header .subject-label { text-transform: uppercase; letter-spacing: 0.5px; font-size: 11px; color: var(--muted); font-weight: 600; }
.preview-header .subject-value { color: var(--ink); font-weight: 600; font-size: 14px; }

iframe#preview-frame {
  display: block;
  margin: 0 auto;
  width: 100%;
  max-width: 900px;
  height: 720px;
  border: none;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}
.preview-footer { display: flex; justify-content: center; margin-top: 12px; }

.theme-toggle {
  margin-left: auto;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--glass);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.2s ease;
}
.theme-toggle:hover { background: var(--glass-strong); transform: rotate(15deg) translateY(-1px); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: inline; }