/* ===== CSS-переменные: тёмная тема ===== */
:root {
  --bg-primary: #1E1E2E;
  --bg-secondary: #252535;
  --bg-card: #2A2A3E;
  --accent: #7F77DD;
  --accent-hover: #9B95E8;
  --accent-light: rgba(127, 119, 221, 0.15);
  --text-primary: #CDD6F4;
  --text-secondary: #A6ADC8;
  --text-muted: #6C7086;
  --border: #383850;
  --success: #A6E3A1;
  --error: #F38BA8;
  --warning: #FAB387;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== Типографика ===== */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }

p { color: var(--text-secondary); }

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

/* ===== Лэйаут ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Шапка (header) ===== */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.header__nav {
  display: flex;
  gap: 24px;
  list-style: none;
}

.header__nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition);
}
.header__nav a:hover { color: var(--text-primary); }

/* ===== Кнопки ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
  text-decoration: none;
}

.btn:active { transform: scale(0.97); }

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

.btn--secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn--secondary:hover { background: var(--border); }

.btn--ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn--ghost:hover { background: var(--accent-light); }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn--lg { padding: 14px 28px; font-size: 1rem; }
.btn--sm { padding: 6px 14px; font-size: 0.85rem; }

/* ===== Карточки инструментов ===== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: 40px 0;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  text-decoration: none;
  display: block;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.tool-card__icon {
  font-size: 2rem;
  margin-bottom: 14px;
  display: block;
}

.tool-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.tool-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.tool-card__badge {
  display: inline-block;
  margin-top: 14px;
  padding: 3px 10px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

/* ===== Секция Hero ===== */
.hero {
  padding: 60px 0 20px;
  text-align: center;
}

.hero__title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ===== Формы ===== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  padding: 10px 14px;
  transition: border-color var(--transition);
  font-family: inherit;
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237F77DD' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

/* ===== Страница инструмента ===== */
.tool-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px;
}

.tool-page__header {
  margin-bottom: 36px;
}

.tool-page__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
  transition: color var(--transition);
}
.tool-page__back:hover { color: var(--text-primary); }

.tool-page__title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.tool-page__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===== Блок результата ===== */
.result-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 28px;
  display: none;
}

.result-block.visible { display: block; }

.result-block__actions {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.result-content {
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Markdown-стили внутри результата */
.result-content strong { color: var(--accent-hover); font-weight: 700; }
.result-content h1,
.result-content h2,
.result-content h3 { margin: 16px 0 8px; }
.result-content ul, .result-content ol { padding-left: 20px; }
.result-content li { margin-bottom: 4px; }
.result-content table { border-collapse: collapse; width: 100%; margin: 12px 0; }
.result-content td, .result-content th {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.result-content th { background: var(--bg-secondary); color: var(--accent); }

/* ===== Лоадер ===== */
.loader {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
}

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

/* ===== Уведомление (toast) ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 0.9rem;
  color: var(--text-primary);
  box-shadow: var(--shadow);
  transform: translateY(80px);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  z-index: 999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast--success { border-color: var(--success); color: var(--success); }
.toast--error   { border-color: var(--error);   color: var(--error);   }

/* ===== Футер ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 60px;
}

/* ===== Адаптивность ===== */
@media (max-width: 640px) {
  h1 { font-size: 1.5rem; }
  .hero__title { font-size: 1.8rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .header__nav { display: none; }
  .tool-page { padding: 28px 16px; }
}