/* ==========================================
   Ecosystem Theme: Light Platinum (Светлая платина)
   ========================================== */

:root {
  /* Палитра светлой платины */
  --bg-platinum: #E5E4E2;
  --bg-platinum-darker: #D8D7D5;
  --card-bg: #EFEEEB;
  --border-color: #CDCBC8;

  /* Типографика и цвета текста */
  --text-dark: #1C1C1E;
  --text-muted: #55555C;

  /* Акцентные цвета */
  --primary-color: #0d6efd;
  --primary-hover: #0b5ed7;
  --accent-green: #059669;
  --accent-red: #dc2626;

  /* Эффекты и скругления */
  --shadow-subtle: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* ==========================================
   Базовый сброс и глобальные стили
   ========================================== */

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

html, body {
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-platinum);
  color: var(--text-dark);
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

/* ==========================================
   Общая шапка навигации (Navbar)
   ========================================== */

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 5%;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-platinum);
}

.navbar nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.navbar nav a {
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.navbar nav a:hover,
.navbar nav a.active {
  color: var(--primary-color);
}

/* ==========================================
   Общие утилиты и компоненты
   ========================================== */

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.btn {
  display: inline-block;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--primary-color);
  color: #FFFFFF;
}

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

.btn-secondary {
  background-color: var(--bg-platinum-darker);
  color: var(--text-dark);
  border: 1px solid var(--border-color);
}

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

.btn-outline {
  background: transparent;
  color: var(--text-dark);
  border: 1px solid var(--text-muted);
}

.btn-outline:hover {
  border-color: var(--text-dark);
  background-color: rgba(0, 0, 0, 0.03);
}
/* ==========================================
   Модальное окно авторизации
   ========================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-hover);
  position: relative;
  transform: translateY(-20px);
  transition: transform var(--transition-fast);
}

.modal-overlay.active .modal-card {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-dark);
}

/* Переключатель Вход / Регистрация */
.auth-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.auth-tab {
  background: none;
  border: none;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  transition: color var(--transition-fast);
}

.auth-tab.active {
  color: var(--primary-color);
  border-bottom: 2px solid var(--primary-color);
}

/* Формы */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-form.hidden {
  display: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dark);
}

.form-input, .form-select {
  padding: 10px 14px;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-platinum-darker);
  color: var(--text-dark);
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-select:focus {
  border-color: var(--primary-color);
}

.auth-submit-btn {
  margin-top: 8px;
  width: 100%;
}