/* ========================
   Переменные и базовые стили
   ======================== */
:root {
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --text: #1E293B;
  --text-secondary: #64748B;
  --border: #E2E8F0;
  --error: #EF4444;
  --success: #22C55E;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --bg: #0F172A;
  --card-bg: #1E293B;
  --text: #E2E8F0;
  --text-secondary: #94A3B8;
  --border: #334155;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========================
   Шапка
   ======================== */
.header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.logo span {
  color: var(--text);
}

.theme-toggle {
  background: var(--border);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: var(--primary);
  transform: rotate(20deg);
}

/* ========================
   Основной контент
   ======================== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px;
  flex: 1;
  width: 100%;
}

/* ========================
   Поисковая секция
   ======================== */
.search-section {
  text-align: center;
  margin-bottom: 32px;
}

.title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 28px;
}

.search-box {
  display: flex;
  gap: 12px;
  max-width: 540px;
  margin: 0 auto;
}

.search-input {
  flex: 1;
  padding: 14px 18px;
  font-size: 1.15rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--text);
  outline: none;
  transition: var(--transition);
  letter-spacing: 0.5px;
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-input::placeholder {
  color: var(--text-secondary);
}

.search-btn {
  padding: 14px 28px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.search-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.search-btn:active {
  transform: translateY(0);
}

.error-msg {
  color: var(--error);
  font-size: 0.9rem;
  margin-top: 10px;
  min-height: 20px;
  transition: var(--transition);
}

/* ========================
   Загрузка
   ======================== */
.loading {
  display: none;
  text-align: center;
  padding: 40px 0;
  color: var(--text-secondary);
}

.loading.active {
  display: block;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

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

/* ========================
   Карточка результата
   ======================== */
.result-card {
  display: none;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 32px;
  border: 1px solid var(--border);
  animation: fadeInUp 0.4s ease;
}

.result-card.active {
  display: block;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

.result-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}

.copy-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

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

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.result-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: var(--bg);
  border-radius: 10px;
  border: 1px solid var(--border);
}

.result-icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
}

.result-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.result-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

/* ========================
   История поиска
   ======================== */
.history-section {
  display: none;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  border: 1px solid var(--border);
}

.history-section.active {
  display: block;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.clear-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.clear-btn:hover {
  border-color: var(--error);
  color: var(--error);
}

.history-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.history-item:hover {
  background: var(--bg);
  border-color: var(--border);
}

.history-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary);
}

.history-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-align: right;
}

/* ========================
   Футер
   ======================== */
.footer {
  text-align: center;
  padding: 20px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
}

.footer a {
  color: var(--primary);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* ========================
   Адаптивность
   ======================== */
@media (max-width: 600px) {
  .title { font-size: 1.5rem; }
  .search-box { flex-direction: column; }
  .search-btn { width: 100%; }
  .result-grid { grid-template-columns: 1fr; }
  .result-number { font-size: 1.2rem; }
}