/* ============================================================
   CSS custom properties
   ============================================================ */
:root {
  --bg: linear-gradient(165deg, #b2d9f5 0%, #ceeabd 50%, #edf6e8 100%);
  --card-bg: #ffffff;
  --card-shadow: 0 4px 24px rgba(0,0,0,.10);
  --text: #1a1d23;
  --text-muted: #6b7280;
  --border: #d1d5db;
  --input-bg: #ffffff;
  --input-focus-border: #2fa700;
  --input-focus-shadow: 0 0 0 3px rgba(47,167,0,.15);
  --btn-primary-bg: #2fa700;
  --btn-primary-hover: #279100;
  --btn-secondary-bg: #f3f4f6;
  --btn-secondary-hover: #e5e7eb;
  --btn-secondary-text: #374151;
  --alert-error-bg: #fef2f2;
  --alert-error-border: #fca5a5;
  --alert-error-text: #991b1b;
  --alert-success-bg: #f0fdf4;
  --alert-success-border: #86efac;
  --alert-success-text: #166534;
  --brand-border: #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: linear-gradient(165deg, #06101e 0%, #091a0d 55%, #0f1117 100%);
    --card-bg: #1e2130;
    --card-shadow: 0 4px 24px rgba(0,0,0,.40);
    --text: #e5e7eb;
    --text-muted: #9ca3af;
    --border: #374151;
    --input-bg: #111827;
    --input-focus-border: #35b800;
    --input-focus-shadow: 0 0 0 3px rgba(53,184,0,.20);
    --btn-primary-bg: #35b800;
    --btn-primary-hover: #2fa700;
    --btn-secondary-bg: #374151;
    --btn-secondary-hover: #4b5563;
    --btn-secondary-text: #d1d5db;
    --alert-error-bg: #3b1515;
    --alert-error-border: #7f1d1d;
    --alert-error-text: #fca5a5;
    --alert-success-bg: #052e16;
    --alert-success-border: #14532d;
    --alert-success-text: #86efac;
    --brand-border: #374151;
  }
}

/* ============================================================
   Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 2rem 1rem;
}

/* ============================================================
   Card
   ============================================================ */
.card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  padding: 2rem 2.5rem;
  width: 100%;
  max-width: 440px;
}

/* ============================================================
   Brand
   ============================================================ */
.brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.brand-logo {
  height: 2rem;
  width: auto;
  object-fit: contain;
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ============================================================
   Page title / subtitle
   ============================================================ */
.page-title {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.page-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.page-subtitle a {
  color: var(--btn-primary-bg);
  text-decoration: none;
}

.page-subtitle a:hover {
  text-decoration: underline;
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}

.alert-error {
  background: var(--alert-error-bg);
  border-color: var(--alert-error-border);
  color: var(--alert-error-text);
}

.alert-success {
  background: var(--alert-success-bg);
  border-color: var(--alert-success-border);
  color: var(--alert-success-text);
}

/* ============================================================
   Forms
   ============================================================ */
.form-field {
  margin-bottom: 1rem;
}

.form-control {
  display: block;
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color .15s, box-shadow .15s;
  outline: none;
  -webkit-appearance: none;
}

.form-control:focus {
  border-color: var(--input-focus-border);
  box-shadow: var(--input-focus-shadow);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-control:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Input group with toggle button */
.input-group {
  position: relative;
}

.input-group .form-control {
  padding-right: 3rem;
}

.btn-toggle-password {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  border-radius: 0 8px 8px 0;
  transition: color .15s;
  padding: 0;
}

.btn-toggle-password:hover {
  color: var(--text);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-family: inherit;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, color .15s, border-color .15s, box-shadow .15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: #ffffff;
  border-color: var(--btn-primary-bg);
}

.btn-primary:hover {
  background: var(--btn-primary-hover);
  border-color: var(--btn-primary-hover);
}

.btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--btn-secondary-hover);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn-group .btn {
  flex: 1;
}

/* ============================================================
   Message page
   ============================================================ */
.message-page {
  padding: 0.5rem 0;
}

.details-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

/* ============================================================
   altcha widget
   ============================================================ */
.form-field altcha-widget {
  display: block;
  max-width: 100% !important;
  margin: 0 auto;
}

.form-field altcha-widget .altcha {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.9375rem;
  padding: 0;
  overflow: hidden;
  max-width: 100% !important;
}

.form-field altcha-widget .altcha-main {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.875rem;
}

.form-field altcha-widget .altcha-checkbox {
  flex-shrink: 0;
}

.form-field altcha-widget .altcha-checkbox input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  accent-color: var(--btn-primary-bg);
  cursor: pointer;
  margin: 0;
}

.form-field altcha-widget .altcha-label {
  flex: 1;
}

.form-field altcha-widget .altcha-label label {
  cursor: pointer;
  color: var(--text);
}

.form-field altcha-widget .altcha-logo {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  transition: color .15s;
}

.form-field altcha-widget .altcha-logo:hover {
  color: var(--text);
}

.form-field altcha-widget .altcha-footer {
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 0.35rem 0.875rem;
  border-top: 1px solid var(--border);
  background: var(--btn-secondary-bg);
}

.form-field altcha-widget .altcha-footer a {
  color: var(--btn-primary-bg);
  text-decoration: none;
}

.form-field altcha-widget .altcha-footer a:hover {
  text-decoration: underline;
}

/* ============================================================
   Card wide (profile page)
   ============================================================ */
.card-wide {
  max-width: 680px;
}

/* ============================================================
   Tabs
   ============================================================ */
.tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.5rem;
}

.tab-btn {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 500;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  color: var(--text-muted);
  border-radius: 4px 4px 0 0;
  transition: color .15s, border-color .15s;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--btn-primary-bg);
  border-bottom-color: var(--btn-primary-bg);
}

.tab-panel.hidden {
  display: none;
}

/* ============================================================
   Profile: Account tab
   ============================================================ */
.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.info-table th,
.info-table td {
  padding: 0.5rem 0.625rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.info-table th {
  width: 38%;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.info-table tr:last-child th,
.info-table tr:last-child td {
  border-bottom: none;
}

.section-empty {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   Profile: Email & Aliases tab
   ============================================================ */
.section-title {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.625rem;
}

.section-title + .section-title,
.email-list + .section-title,
.alias-list + .section-title {
  margin-top: 1.25rem;
}

.email-list {
  list-style: none;
  margin-bottom: 0.5rem;
}

.email-list li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.email-list li:last-child {
  border-bottom: none;
}

.alias-list {
  list-style: none;
}

.alias-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
}

.alias-item:last-child {
  border-bottom: none;
}

.alias-value {
  font-size: 0.875rem;
  word-break: break-all;
}

.alias-create {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.alias-domain-select {
  font-size: 0.875rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}

.alias-create-error {
  font-size: 0.8rem;
  color: var(--danger);
}

/* ============================================================
   Profile: API tab
   ============================================================ */
.api-token-box {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8125rem;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  word-break: break-all;
  margin: 0.75rem 0;
  user-select: all;
}

.section-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.section-desc code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8125rem;
  background: var(--btn-secondary-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  color: var(--text);
}

/* ============================================================
   Button variants
   ============================================================ */
.btn-danger {
  background: #dc2626;
  color: #ffffff;
  border-color: #dc2626;
}

.btn-danger:hover {
  background: #b91c1c;
  border-color: #b91c1c;
}

.btn-sm {
  padding: 0.3rem 0.75rem;
  font-size: 0.8125rem;
  border-radius: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}