:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #e5e5e5;
  --accent: #2a7a4b;
  --accent-hover: #3d9166;
  --accent-fg: #ffffff;
  --danger: #c0392b;
  --hover: #f5f5f5;
  --flash: #e6f4ea;
  --flash-border: #a9d8b8;
  --warn: #fff4d6;
  --warn-border: #e0c988;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1a;
    --fg: #f0f0f0;
    --muted: #999;
    --border: #333;
    --accent: #4caf50;
    --accent-hover: #6cc070;
    --accent-fg: #ffffff;
    --danger: #e57373;
    --hover: #262626;
    --flash: #1f3a27;
    --flash-border: #2f5a3b;
    --warn: #3d3420;
    --warn-border: #6b5a2a;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.45;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
  word-break: break-all;
}

/* ---- landing layout (welcome/login/signup_done) ---- */

body.landing {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 48px 16px;
  min-height: 100vh;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.card h1 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 22px;
}

.tagline { font-size: 16px; margin: 0 0 4px; }
.subtext { color: var(--muted); margin: 0 0 20px; }

.card form { display: flex; flex-direction: column; gap: 12px; margin: 0; }
.card label { display: flex; flex-direction: column; font-size: 13px; color: var(--muted); gap: 4px; }
.card input {
  font-family: inherit;
  font-size: 14px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
}
.card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

button {
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  border-radius: 6px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
}
button:hover:not(:disabled) { background: var(--hover); }
button:disabled { opacity: 0.5; cursor: default; }

button.primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
  padding: 10px 14px;
  font-weight: 500;
}
button.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }

button.linkish {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 0;
  font-size: 13px;
  cursor: pointer;
}
button.linkish:hover { color: var(--fg); text-decoration: underline; background: transparent; }

.danger-link {
  background: transparent;
  border: none;
  color: var(--danger);
  padding: 0;
  cursor: pointer;
  font-size: 13px;
}
.danger-link:hover { text-decoration: underline; background: transparent; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.error {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
}
.flash {
  background: var(--flash);
  border: 1px solid var(--flash-border);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
}
.warn {
  background: var(--warn);
  border: 1px solid var(--warn-border);
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin: 0 0 16px;
}

.cred-block { margin-bottom: 14px; }
.cred-block .label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.cred {
  display: block;
  padding: 10px 12px;
  background: var(--hover);
  border: 1px solid var(--border);
  border-radius: 6px;
  user-select: all;
}

.hint {
  display: block;
  text-align: center;
  margin-top: 16px;
  color: var(--muted);
  font-size: 12px;
}

/* ---- app layout (inbox, addresses, email) ---- */

.topnav {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
}
.topnav .brand a { color: var(--fg); font-weight: 600; font-size: 16px; }
.topnav nav { display: flex; gap: 16px; }
.topnav nav a { color: var(--muted); font-size: 14px; }
.topnav nav a:hover { color: var(--fg); }
.topnav .logout {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.container { max-width: 860px; margin: 0 auto; padding: 20px; }

.pageheader {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.pageheader h1 { margin: 0; font-size: 22px; }

form.inline { display: inline; margin: 0; }

/* ---- inbox ---- */

.email-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.email-list li + li { border-top: 1px solid var(--border); }
.email-list li { display: flex; align-items: stretch; }
.email-list .email-link {
  display: block;
  flex: 1;
  min-width: 0;
  padding: 12px 16px;
  color: var(--fg);
  text-decoration: none;
}
.email-list .email-link:hover { background: var(--hover); text-decoration: none; }
.email-list .email-delete {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0 16px;
  flex-shrink: 0;
}
.email-list .row1 {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
}
.email-list .row1 .from { color: var(--fg); font-weight: 500; }
.email-list .row2 { margin-top: 2px; }
.email-list .subject { font-weight: 500; }
.email-list .row3 { margin-top: 2px; font-size: 12px; }
.email-list .preview {
  margin-top: 4px;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---- email view ---- */

.back { margin: 0 0 12px; font-size: 13px; }
.email h1 { font-size: 20px; margin: 0 0 12px; }
.email-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  margin: 0 0 16px;
  font-size: 13px;
}
.email-meta dt { color: var(--muted); }
.email-meta dd { margin: 0; word-break: break-word; }
.email-body {
  white-space: pre-wrap;
  word-wrap: break-word;
  background: var(--hover);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.5;
}

/* ---- addresses ---- */

.addresses {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.addresses th, .addresses td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
.addresses th {
  font-weight: 500;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.addresses td:last-child { text-align: right; }

.empty {
  color: var(--muted);
  padding: 32px 16px;
  text-align: center;
  border: 1px dashed var(--border);
  border-radius: 8px;
}