/*
 * DNS Change Checker — Vikingo Design System (plain CSS port)
 * Source tokens: https://github.com/vikingokft/vikingo-design-system
 */

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300;1,400;1,500&family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&display=swap');
@import url('https://api.fontshare.com/v2/css?f[]=clash-display@500,600,700&display=swap');

:root {
  --color-bg: #F6EFE8;
  --color-surface: #FFFFFF;
  --color-surface-raised: #FFFFFF;

  --color-text: #3E2E45;
  --color-text-muted: #7A6A82;
  --color-text-subtle: #9B8FA3;
  --color-text-on-accent: #FFFFFF;

  --color-accent: #FF544D;
  --color-accent-hover: #E83D36;
  --color-accent-muted: rgba(255, 84, 77, 0.12);

  --color-border: #E0D9D1;
  --color-border-strong: #C9BFB6;
  --color-border-focus: #FF544D;

  --color-success: #22C55E;
  --color-success-muted: rgba(34, 197, 94, 0.12);
  --color-warning: #F59E0B;
  --color-warning-muted: rgba(245, 158, 11, 0.12);
  --color-error: #EF4444;
  --color-error-muted: rgba(239, 68, 68, 0.12);
  --color-info: #3B82F6;
  --color-info-muted: rgba(59, 130, 246, 0.12);

  --sidebar-bg: #3E2E45;
  --sidebar-bg-hover: #4E3A58;
  --sidebar-bg-active: #FF544D;
  --sidebar-text: #F6EFE8;
  --sidebar-text-active: #FFFFFF;
  --sidebar-text-muted: rgba(246, 239, 232, 0.6);
  --sidebar-border: rgba(246, 239, 232, 0.1);
  --sidebar-width: 240px;

  --font-display: 'Clash Display', 'Inter', system-ui, sans-serif;
  --font-body: 'DM Sans', 'Inter', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', ui-monospace, monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  --shadow-sm: 0 1px 2px rgba(62, 46, 69, 0.06);
  --shadow-md: 0 4px 12px rgba(62, 46, 69, 0.08);
  --shadow-lg: 0 8px 24px rgba(62, 46, 69, 0.12);
  --shadow-xl: 0 16px 40px rgba(62, 46, 69, 0.16);

  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;

  --topbar-height: 60px;
  --topbar-bg: #FFFFFF;
}

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

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 var(--spacing-md);
}
h1 { font-size: 32px; line-height: 1.2; }
h2 { font-size: 24px; line-height: 1.25; }
h3 { font-size: 18px; line-height: 1.35; }

p { margin: 0 0 var(--spacing-md); }

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

code, kbd, samp, pre { font-family: var(--font-mono); }
pre {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ===== LAYOUT ===== */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: var(--spacing-lg) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  border-right: 1px solid var(--sidebar-border);
}
.sidebar-brand {
  padding: 0 var(--spacing-lg) var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border-bottom: 1px solid var(--sidebar-border);
}
.sidebar-brand img { width: 28px; height: 38px; filter: invert(1); }
.sidebar-brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.sidebar-brand-sub {
  font-size: 11px;
  color: var(--sidebar-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 var(--spacing-sm);
}
.sidebar-nav a {
  color: var(--sidebar-text-muted);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  font-size: 14px;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.sidebar-nav a:hover {
  background: var(--sidebar-bg-hover);
  color: var(--sidebar-text);
  text-decoration: none;
}
.sidebar-nav a.is-active {
  background: var(--sidebar-bg-active);
  color: var(--sidebar-text-active);
}
.sidebar-footer {
  margin-top: auto;
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--sidebar-border);
  font-size: 12px;
  color: var(--sidebar-text-muted);
}
.sidebar-logout-form { margin-top: var(--spacing-sm); }

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.topbar {
  height: var(--topbar-height);
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}
.topbar-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}
.content {
  padding: var(--spacing-xl);
  max-width: 1200px;
  width: 100%;
}

/* ===== PAGE HEADER ===== */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}
.page-header h1 { margin-bottom: var(--spacing-xs); }
.page-header-sub { color: var(--color-text-muted); margin: 0; }
.page-header-actions { display: flex; gap: var(--spacing-sm); flex-shrink: 0; }

/* ===== CARD ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
}
.card + .card { margin-top: var(--spacing-lg); }
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}
.card-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}
.card-subtitle { color: var(--color-text-muted); font-size: 13px; margin: 4px 0 0; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
  user-select: none;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-accent-muted);
}
.btn:active { box-shadow: 0 0 0 3px var(--color-accent-muted); }
.btn[disabled], .btn:disabled { opacity: 0.5; pointer-events: none; }

.btn-sm { height: 32px; padding: 0 12px; font-size: 13px; }
.btn-lg { height: 48px; padding: 0 24px; font-size: 15px; }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-on-accent);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-accent-hover); box-shadow: var(--shadow-md); text-decoration: none; color: var(--color-text-on-accent); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { background: var(--color-bg); border-color: var(--color-border-strong); box-shadow: var(--shadow-md); text-decoration: none; color: var(--color-text); }

.btn-ghost {
  background: transparent;
  color: var(--color-text);
}
.btn-ghost:hover { background: var(--color-accent-muted); color: var(--color-accent); text-decoration: none; }

.btn-destructive {
  background: var(--color-error);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-destructive:hover { filter: brightness(0.94); box-shadow: var(--shadow-md); text-decoration: none; color: #fff; }

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-outline:hover { background: var(--color-accent-muted); text-decoration: none; color: var(--color-accent); }

.btn-inline { display: inline; padding: 0; background: none; border: none; color: var(--color-accent); cursor: pointer; font: inherit; }
.btn-inline:hover { text-decoration: underline; }

/* ===== FORMS ===== */
.form-field { margin-bottom: var(--spacing-md); }
.form-field:last-child { margin-bottom: 0; }

.label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}
.label-hint { color: var(--color-text-muted); font-weight: 400; margin-left: 4px; }

.input, .select, .textarea {
  width: 100%;
  font: inherit;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  height: 40px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.textarea { height: auto; min-height: 96px; font-family: var(--font-mono); font-size: 13px; }
.input:hover, .select:hover, .textarea:hover { border-color: var(--color-border-strong); }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-accent-muted);
}
.input::placeholder, .textarea::placeholder { color: var(--color-text-subtle); }

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
}
.checkbox-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 13px;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  user-select: none;
}
.checkbox-pill input { appearance: none; width: 14px; height: 14px; border: 1.5px solid var(--color-border-strong); border-radius: 3px; cursor: pointer; position: relative; margin: 0; }
.checkbox-pill input:checked { background: var(--color-accent); border-color: var(--color-accent); }
.checkbox-pill input:checked::after { content: ''; position: absolute; left: 3px; top: 0px; width: 4px; height: 8px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.checkbox-pill:has(input:checked) { background: var(--color-accent-muted); border-color: var(--color-accent); color: var(--color-accent); }

/* ===== TABLE ===== */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: var(--color-surface); }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table th, .table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.table th {
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--color-bg);
}
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: rgba(246, 239, 232, 0.4); }
.table td code { background: var(--color-bg); padding: 2px 6px; border-radius: var(--radius-sm); font-size: 12.5px; }

/* ===== BADGE ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.badge-success { background: var(--color-success-muted); color: #15803d; border-color: transparent; }
.badge-warning { background: var(--color-warning-muted); color: #b45309; border-color: transparent; }
.badge-error { background: var(--color-error-muted); color: #b91c1c; border-color: transparent; }
.badge-info { background: var(--color-info-muted); color: #1d4ed8; border-color: transparent; }
.badge-accent { background: var(--color-accent-muted); color: var(--color-accent); border-color: transparent; }

.badge-dot::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: var(--radius-full);
  background: currentColor;
  display: inline-block;
}

.type-pills { display: flex; flex-wrap: wrap; gap: 4px; }

/* ===== NEXT-CHECK COUNTDOWN PILL ===== */
.next-check-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}
.next-check-pill strong { color: var(--color-text); font-weight: 500; }
.next-check-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-muted);
  animation: nextCheckPulse 2s ease-in-out infinite;
}
.next-check-pill.is-running .next-check-dot {
  background: var(--color-success);
  box-shadow: 0 0 0 3px var(--color-success-muted);
  animation: nextCheckPulse 600ms ease-in-out infinite;
}
@keyframes nextCheckPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

/* ===== ALERT ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-bottom: var(--spacing-md);
  font-size: 14px;
}
.alert-success { background: var(--color-success-muted); border-color: transparent; color: #15803d; }
.alert-error { background: var(--color-error-muted); border-color: transparent; color: #b91c1c; }
.alert-info { background: var(--color-info-muted); border-color: transparent; color: #1d4ed8; }

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  color: var(--color-text-muted);
}
.empty-state h3 { color: var(--color-text); margin-bottom: 4px; }
.empty-state p { margin-bottom: var(--spacing-md); }

/* ===== LOGIN PAGE ===== */
.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--spacing-lg);
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 84, 77, 0.08), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(62, 46, 69, 0.08), transparent 50%),
    var(--color-bg);
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border);
}
.auth-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-bottom: var(--spacing-md);
}
.auth-brand img { width: 40px; height: 54px; }
.auth-title { text-align: center; }
.auth-title h1 { font-size: 24px; margin: 0; }
.auth-title p { color: var(--color-text-muted); margin-top: 4px; }

/* ===== UTIL ===== */
.muted { color: var(--color-text-muted); }
.subtle { color: var(--color-text-subtle); }
.mono { font-family: var(--font-mono); }
.nowrap { white-space: nowrap; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: var(--spacing-md); }
.flex-gap-sm { display: flex; gap: var(--spacing-sm); align-items: center; }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.kv-grid {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 10px 16px;
  font-size: 14px;
}
.kv-grid dt { color: var(--color-text-muted); font-weight: 500; }
.kv-grid dd { margin: 0; }

.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}
.diff-box h4 {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 6px;
}
.diff-box pre {
  background: var(--color-bg);
  font-size: 12.5px;
  max-height: 220px;
  overflow: auto;
}
.diff-box.diff-old pre { background: var(--color-error-muted); }
.diff-box.diff-new pre { background: var(--color-success-muted); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: sticky; top: 0; z-index: 10; padding: var(--spacing-sm); }
  .sidebar-brand { padding-bottom: var(--spacing-sm); border-bottom: none; }
  .sidebar-footer { display: none; }
  .sidebar-nav { flex-direction: row; overflow-x: auto; }
  .sidebar-nav a { flex-shrink: 0; }
  .content { padding: var(--spacing-md); }
  .kv-grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
}