:root{
  --bg:#f5f7fa;
  --text:#1f2937;
  --card:#ffffff;
  --header:#1f2937;
  --muted:#4b5563;
  --button:#2563eb;
}

body.dark{
  --bg:#0f172a;
  --text:#e5e7eb;
  --card:#1e293b;
  --header:#020617;
  --muted:#9ca3af;
  --button:#3b82f6;
}

/* Общие стили */
* {box-sizing:border-box; transition: background-color .4s, color .4s;}
body {margin:0;font-family:Arial,sans-serif;background:var(--bg);color:var(--text);}
.container{max-width:1100px;margin:auto;padding:20px;}
h1,h2{text-align:center;}

/* Header */
header{
  background:var(--header);
  color:white;
  padding:40px 20px;
  text-align:center;
  position:relative;
}
header p{font-size:18px;opacity:.9;margin-bottom:20px;}
.tg-button{
  display:inline-block;
  padding:12px 22px;
  background:#229ED9;
  color:white;
  text-decoration:none;
  border-radius:6px;
  font-weight:bold;
}

/* Кнопка темы */
.theme-toggle{
  position:absolute;
  top:20px;
  right:20px;
  width:44px;
  height:44px;
  border-radius:50%;
  border:none;
  background:rgba(255,255,255,0.15);
  backdrop-filter: blur(6px);
  color:white;
  font-size:20px;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  box-shadow:0 4px 10px rgba(0,0,0,.25);
  transition:transform .2s, background .3s;
}
.theme-toggle:hover{background:rgba(255,255,255,0.25);transform:scale(1.05);}
.theme-toggle:active{transform:scale(0.9) rotate(15deg);}

/* Grid и карточки */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;}
.card{
  background:var(--card);
  border-radius:8px;
  padding:15px;
  box-shadow:0 4px 12px rgba(0,0,0,.15);
  display:flex;
  flex-direction:column;
  opacity:0;
  transform:translateY(40px);
  transition:all 0.6s ease-out;
}
.card.visible{opacity:1; transform:translateY(0);}
.card img{width:100%; height:180px; object-fit:cover; border-radius:6px;}
.card p{color:var(--muted);}
.card button{margin-top:auto;padding:10px;background:var(--button);color:white;border:none;border-radius:6px;cursor:pointer;}

/* Форма */
form{
  background:var(--card);
  padding:20px;
  border-radius:8px;
  max-width:500px;
  margin:auto;
  box-shadow:0 4px 12px rgba(0,0,0,.15);
}
form input, form textarea, form button{
  width:100%;
  padding:12px;
  margin-bottom:12px;
  border-radius:6px;
  border:1px solid #ccc;
  font-size:15px;
  background:var(--card);
  color:var(--text);
}
form input:focus, form textarea:focus{outline:none; border-color:var(--button);}
form button{background:var(--button);color:white;border:none;cursor:pointer;}

/* Footer */
footer{text-align:center;padding:20px;color:var(--muted);}

/* Toast */
.toast{
  position:fixed;
  bottom:30px;
  right:30px;
  background:var(--button);
  color:white;
  padding:15px 20px;
  border-radius:8px;
  box-shadow:0 4px 12px rgba(0,0,0,.25);
  opacity:0;
  transform:translateY(40px);
  transition:opacity .4s, transform .4s;
  z-index:9999;
}
.toast.show{opacity:1; transform:translateY(0);}

/* Кнопка */
.sticky-booking{
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9998;

  width: calc(100% - 32px);
  max-width: 420px;

  padding: 16px 18px;
  border-radius: 14px;
  border: none;

  background: var(--button);
  color: #fff;

  font-size: 16px;
  font-weight: 800;
  letter-spacing: .2px;

  box-shadow: 0 14px 28px rgba(0,0,0,.22);
  cursor: pointer;
}

.sticky-booking:hover{ transform: translateX(-50%) translateY(-1px); }
.sticky-booking:active{ transform: translateX(-50%) scale(.99); }

@media (min-width: 1024px){
  .sticky-booking{
    left: auto;
    right: 22px;
    bottom: 22px;
    transform: none;
    width: auto;
    max-width: none;
    padding: 14px 20px;
  }
  .sticky-booking:hover{ transform: translateY(-1px); }
  .sticky-booking:active{ transform: scale(.99); }
}