/* =============================================================
   ЕДИНЫЙ СТИЛЬ ДЛЯ ИНСТРУМЕНТОВ
   ============================================================= */
:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-soft: #1a2332;
  --text: #e2e8f0;
  --text-soft: #cbd5e1;
  --muted: #94a3b8;
  --ok: #22c55e;
  --warn: #eab308;
  --err: #ef4444;
  --accent: #38bdf8;
  --accent-dark: #0b1220;
  --border: #334155;
  --card-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

/* Светлая тема (опционально, для генератора паролей) */
body.light {
  --bg: #f5f5f5;
  --panel: #ffffff;
  --panel-soft: #f1f5f9;
  --text: #0f172a;
  --text-soft: #334155;
  --muted: #64748b;
  --accent: #4f46e5;
  --accent-dark: #eef2ff;
  --border: #cbd5e1;
  --card-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.55;
  padding: 1.5rem 1rem 4rem;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

.app-wrapper {
  max-width: 1000px;
  margin: 0 auto;
}

/* ===== ЗАГОЛОВОК ===== */
.app-header {
  text-align: center;
  margin-bottom: 2rem;
}

.app-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.app-header .badge-duo {
  background: var(--accent);
  color: #06263a;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.app-header .subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.3rem;
}

/* ===== ПАНЕЛИ / КАРТОЧКИ ===== */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
}

.hidden {
  display: none !important;
}

/* ===== ЭЛЕМЕНТЫ ФОРМ ===== */
input[type="text"] {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--accent-dark);
  color: var(--text);
  font-size: 1rem;
  transition: border-color var(--transition), outline var(--transition);
}

input[type="text"]:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin: 0.3rem 0 0.2rem;
}

input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--accent);
  cursor: pointer;
}

button {
  padding: 0.7rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #06263a;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: opacity var(--transition), transform 0.1s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

button:hover:not(:disabled) {
  opacity: 0.88;
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

button.secondary:hover {
  background: rgba(255, 255, 255, 0.04);
}

/* ===== УПРАВЛЯЮЩИЙ БЛОК DNS ===== */
.controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

.controls input[type="text"] {
  flex: 1 1 260px;
}

/* ===== СВОДКА ===== */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.summary-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
}

.summary-card .label {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.summary-card .value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 0.15rem;
  line-height: 1.2;
}

/* ===== СЕКЦИИ РЕЗУЛЬТАТОВ DNS ===== */
.section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1rem;
  box-shadow: var(--card-shadow);
}

.section h2 {
  margin: 0 0 0.8rem;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

.badge.ok {
  background: rgba(34, 197, 94, 0.15);
  color: var(--ok);
  border: 1px solid rgba(34, 197, 94, 0.4);
}

.badge.warn {
  background: rgba(234, 179, 8, 0.15);
  color: var(--warn);
  border: 1px solid rgba(234, 179, 8, 0.4);
}

.badge.err {
  background: rgba(239, 68, 68, 0.15);
  color: var(--err);
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.item {
  border-left: 3px solid var(--border);
  padding: 0.5rem 0 0.5rem 1rem;
  margin: 0.5rem 0;
}

.item.ok {
  border-color: var(--ok);
}

.item.warn {
  border-color: var(--warn);
}

.item.err {
  border-color: var(--err);
}

.item .msg {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.95rem;
}

.item .rfc {
  margin-top: 0.3rem;
  font-size: 0.83rem;
  color: var(--accent);
}

.item .rfc-desc {
  margin-top: 0.2rem;
  font-size: 0.83rem;
  color: var(--muted);
  font-style: italic;
}

code {
  background: var(--accent-dark);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  color: #bae6fd;
  word-break: break-word;
}

/* Светлая тема — корректировка кода */
body.light code {
  color: #1e3a8a;
}

/* ===== СПИННЕР ===== */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 0.4rem;
}

body.light .spinner {
  border-color: rgba(0, 0, 0, 0.1);
  border-top-color: var(--accent);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ===== ГЕНЕРАТОР ПАРОЛЕЙ ===== */
.password-panel {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.password-panel .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.password-panel label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.3rem;
  font-size: 0.95rem;
  color: var(--text-soft);
  cursor: pointer;
}

.result-box {
  margin-top: 1rem;
  padding: 0.9rem 1.1rem;
  background: var(--accent-dark);
  border-radius: var(--radius-sm);
  word-break: break-all;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  border: 1px solid var(--border);
  min-height: 3.2rem;
  display: flex;
  align-items: center;
  color: #bae6fd;
}

body.light .result-box {
  color: #1e3a8a;
}

.strength {
  margin-top: 0.7rem;
  height: 8px;
  width: 100%;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.strength-bar {
  height: 100%;
  width: 0%;
  transition: width 0.3s ease, background 0.3s;
  border-radius: 999px;
}

.strength-text {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.25rem;
  display: block;
}

.copy-status {
  font-size: 0.85rem;
  color: var(--ok);
  min-width: 90px;
  text-align: center;
  flex: 1 1 auto;
}

.toggle-theme-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 999px;
  padding: 0.3rem 1rem;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background var(--transition);
}

.toggle-theme-btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

body.light .toggle-theme-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

/* ===== ПОДВАЛ ===== */
.footer-note {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 1.8rem;
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 1.2rem;
}

a {
  color: var(--accent);
}

/* ===== АДАПТИВ ===== */
@media (max-width: 600px) {
  body {
    padding: 1rem 0.8rem 3rem;
  }

  .app-header h1 {
    font-size: 1.4rem;
  }

  .panel {
    padding: 1.1rem;
  }

  .section {
    padding: 1rem;
  }

  button {
    width: 100%;
    justify-content: center;
  }

  .password-panel .row button {
    width: auto;
    flex: 1;
  }

  .password-panel .row .copy-status {
    flex-basis: 100%;
    order: 3;
  }
}

/* ===== Кнопка темы в dns-check ===== */
.app-header {
  position: relative;
}

.app-header .toggle-theme-btn {
  position: absolute;
  top: 0;
  right: 0;
}

@media (max-width: 600px) {
  .app-header .toggle-theme-btn {
    position: static;
    margin-top: 0.8rem;
  }
}


/* ===== Кнопка перехода на главную ===== */
.back-home-wrapper {
  display: flex;
  justify-content: center;
  margin-top: 1.8rem;
}

.back-home-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background var(--transition), transform 0.1s, border-color var(--transition);
}

.back-home-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent);
  transform: translateY(-1px);
}

body.light .back-home-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}