/* ========================
   Японская эстетика + Liquid Glass
   ======================== */

:root {
  /* Японская цветовая палитра */
  --color-hatsune: 179 38 30;         /* 初音 Хацунэ - сдержанный красный */
  --color-aizome: 38 67 120;          /* 藍染 Айдзомэ - традиционный индиго */
  --color-matcha: 193 216 153;        /* Матча */
  --color-bamboo: 214 233 198;        /* Бамбук */
  --color-sumi: 51 51 51;             /* Чернила суми */
  --color-washi: 254 251 243;         /* Рисовая бумага */
  --color-cedar: 139 90 43;           /* Японский кедр */
  --color-ceramic: 236 229 221;       /* Керамика */
  --color-indigo: 38 67 120;          /* Индиго (дублируется для совместимости) */
  --color-gold: 212 175 55;           /* Золото */
  
  /* Liquid Glass переменные */
  --glass-blur: 8px;
  --glass-opacity: 0.5;
  --glass-border: rgba(139 90 43 / 0.15);
  --glass-shadow: 0 4px 16px rgba(0 0 0 / 0.08);
  
  /* Текстуры */
  --texture-opacity: 0.03;
  
  /* Анимации */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Темная тема */
[data-theme="dark"] {
  --color-sumi: 254 251 243;
  --color-washi: 51 51 51;
  --glass-opacity: 0.5;
  --glass-border: rgba(139 90 43 / 0.08);
  --glass-shadow: 0 4px 16px rgba(0 0 0 / 0.3);
}

/* ========================
   Текстуры японских материалов
   ======================== */

/* Текстура рисовой бумаги */
.texture-washi {
  position: relative;
  overflow: hidden;
}

.texture-washi::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background-image: 
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 2px,
      rgba(var(--color-sumi) / var(--texture-opacity)) 2px,
      rgba(var(--color-sumi) / var(--texture-opacity)) 3px
    ),
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 2px,
      rgba(var(--color-sumi) / var(--texture-opacity)) 2px,
      rgba(var(--color-sumi) / var(--texture-opacity)) 3px
    );
  pointer-events: none;
  mix-blend-mode: multiply;
}

/* Текстура дерева */
.texture-wood {
  position: relative;
  background: linear-gradient(
    180deg,
    rgba(var(--color-cedar) / 0.1) 0%,
    rgba(var(--color-cedar) / 0.05) 50%,
    rgba(var(--color-cedar) / 0.1) 100%
  );
}

.texture-wood::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 20px,
      rgba(var(--color-cedar) / 0.1) 20px,
      rgba(var(--color-cedar) / 0.1) 21px
    );
  pointer-events: none;
}

/* Текстура керамики */
.texture-ceramic {
  position: relative;
  background: radial-gradient(
    ellipse at center,
    rgba(var(--color-ceramic) / 0.9),
    rgba(var(--color-ceramic) / 0.7)
  );
  box-shadow: 
    inset 0 1px 2px rgba(255 255 255 / 0.3),
    inset 0 -1px 2px rgba(0 0 0 / 0.1);
}

/* ========================
   Liquid Glass компоненты
   ======================== */

.glass-panel {
  position: relative;
  background: rgba(var(--color-washi) / var(--glass-opacity));
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: var(--transition-smooth);
  /* Устраняем мерцание на hover за счёт стабильного слоя и GPU */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
  contain: paint;
}

/* Overlay для hover, чтобы не трогать базовый фон с blur */
.glass-panel::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.06);
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-smooth);
  pointer-events: none;
}

.glass-panel:hover::after {
  opacity: 1;
}

.glass-panel:hover {
  box-shadow:
    var(--glass-shadow),
    0 0 20px rgba(var(--color-hatsune) / 0.1);
}

/* Кнопки в японском стиле */
.btn-japanese {
  position: relative;
  padding: 12px 32px;
  background: linear-gradient(
    135deg,
    rgba(var(--color-washi) / 0.9),
    rgba(var(--color-ceramic) / 0.9)
  );
  border: 1px solid rgba(var(--color-sumi) / 0.2);
  border-radius: 8px;
  color: rgb(var(--color-sumi));
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: var(--transition-spring);
  overflow: hidden;
}

.btn-japanese::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(
    circle,
    rgba(var(--color-hatsune) / 0.3),
    transparent
  );
  transition: all 0.6s ease-out;
  transform: translate(-50%, -50%);
}

.btn-japanese:hover::before {
  width: 120%;
  height: 120%;
}

.btn-japanese:hover {
  transform: translateY(-1px);
  box-shadow: 
    0 4px 12px rgba(var(--color-sumi) / 0.1),
    0 1px 3px rgba(var(--color-sumi) / 0.05);
}

/* Акцентная кнопка */
.btn-japanese.accent {
  background: linear-gradient(
    135deg,
    rgba(var(--color-hatsune) / 0.9),
    rgba(var(--color-aizome) / 0.9)
  );
  color: white;
  border-color: transparent;
}

/* ========================
   Формы в японском стиле
   ======================== */

.input-japanese {
  width: 100%;
  padding: 12px 16px;
  background: rgba(var(--color-washi) / 0.5);
  border: 1px solid rgba(var(--color-sumi) / 0.1);
  border-radius: 8px;
  color: rgb(var(--color-sumi));
  transition: var(--transition-smooth);
}

.input-japanese:focus {
  outline: none;
  background: rgba(var(--color-washi) / 0.8);
  border-color: rgba(var(--color-hatsune) / 0.5);
  box-shadow: 
    0 0 0 3px rgba(var(--color-hatsune) / 0.1),
    inset 0 1px 2px rgba(var(--color-sumi) / 0.05);
}

/* ========================
   Карточки туров
   ======================== */

.tour-card {
  position: relative;
  background: linear-gradient(
    to bottom,
    rgba(var(--color-washi) / 0.95),
    rgba(var(--color-ceramic) / 0.95)
  );
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.tour-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    rgb(var(--color-hatsune)),
    rgb(var(--color-aizome)),
    rgb(var(--color-matcha))
  );
  opacity: 0.8;
}

.tour-card:hover {
  transform: translateY(-2px);
  box-shadow: 
    0 8px 16px rgba(var(--color-sumi) / 0.08),
    0 2px 4px rgba(var(--color-sumi) / 0.04);
}

/* ========================
   Навигация в стиле тории
   ======================== */

.nav-torii {
  position: relative;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 0 24px;
  height: 64px;
}

.nav-torii::before,
.nav-torii::after {
  content: '';
  position: absolute;
  bottom: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgb(var(--color-cedar)),
    rgba(var(--color-cedar) / 0.6)
  );
}

.nav-torii::before {
  left: 8px;
}

.nav-torii::after {
  right: 8px;
}

.nav-item {
  position: relative;
  padding: 8px 16px;
  color: rgb(var(--color-sumi));
  text-decoration: none;
  transition: var(--transition-smooth);
}

.nav-item::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: rgb(var(--color-hatsune));
  transition: var(--transition-smooth);
  transform: translateX(-50%);
}

.nav-item:hover::after,
.nav-item.active::after {
  width: 100%;
}

/* ========================
   Анимации в японском стиле
   ======================== */

@keyframes sakura-fall {
  0% {
    transform: translateY(-100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(360deg);
    opacity: 0;
  }
}

.sakura-particle {
  position: fixed;
  width: 10px;
  height: 10px;
  background: radial-gradient(
    circle,
    rgba(var(--color-hatsune) / 0.8),
    rgba(var(--color-hatsune) / 0.4)
  );
  border-radius: 50% 0;
  animation: sakura-fall 10s linear infinite;
  pointer-events: none;
  z-index: 1;
}

/* ========================
   Отзывчивость
   ======================== */

@media (max-width: 768px) {
  .glass-panel {
    --glass-blur: 8px;
    --glass-opacity: 0.9;
  }
  
  .nav-torii {
    padding: 0 16px;
    gap: 16px;
  }
  
  .btn-japanese {
    padding: 10px 24px;
  }
}

/* ========================
   Утилиты
   ======================== */

.text-shadow-soft {
  text-shadow: 0 1px 2px rgba(var(--color-sumi) / 0.1);
}

.divider-wave {
  width: 100%;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(var(--color-sumi) / 0.2) 20%,
    rgba(var(--color-sumi) / 0.2) 80%,
    transparent
  );
  margin: 24px 0;
  position: relative;
}

.divider-wave::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  background: rgb(var(--color-hatsune));
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

/* ========================
   Переходы для страниц
   ======================== */

.page-transition-enter {
  opacity: 0;
  transform: translateX(20px);
}

.page-transition-enter-active {
  opacity: 1;
  transform: translateX(0);
  transition: all 0.3s ease-out;
}

.page-transition-exit {
  opacity: 1;
  transform: translateX(0);
}

.page-transition-exit-active {
  opacity: 0;
  transform: translateX(-20px);
  transition: all 0.3s ease-in;
}

/* Светлые AI карточки */
.glass-panel.texture-ceramic {
  background: linear-gradient(
    135deg,
    rgba(var(--color-washi) / 0.5),
    rgba(var(--color-ceramic) / 0.5)
  );
  backdrop-filter: blur(6px);
  border: 1px solid rgba(var(--color-cedar) / 0.1);
}

/* ========================
   Единый каркас админ-панелей
   ======================== */
.dashboard-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  min-height: 100vh;
}

.sidebar {
  background: linear-gradient(
    to bottom,
    rgba(var(--color-washi) / 0.98),
    rgba(var(--color-washi) / 0.95)
  );
  border-right: 1px solid rgba(var(--color-cedar) / 0.12);
  position: relative;
  backdrop-filter: blur(8px);
}

.sidebar::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 60px,
    rgba(var(--color-cedar) / 0.05) 60px,
    rgba(var(--color-cedar) / 0.05) 61px
  );
  pointer-events: none;
}

.admin-topbar { display:flex; align-items:center; justify-content:space-between; margin-bottom:2rem; }
.admin-topbar .top-actions { display:flex; align-items:center; gap:0.75rem; }

.sidebar-link { display:block; padding:0.75rem 1rem; border-radius:0.5rem; color:rgb(55 65 81); transition:all 0.3s ease; }
.sidebar-link:hover { color:rgb(17 24 39); }
.sidebar-link i { width:1.25rem; }