/* RU: Глобальная дизайн-система проекта: атмосферный Baikal-pass для цвета, глубины и controls. */
/* EN: Global design system: atmospheric Baikal pass for color, depth, and controls. */

:root,
[data-theme="light"] {
  --text-xs: clamp(0.72rem, 0.7rem + 0.15vw, 0.82rem);
  --text-sm: clamp(0.84rem, 0.82rem + 0.14vw, 0.94rem);
  --text-base: clamp(0.96rem, 0.94rem + 0.14vw, 1.02rem);
  --text-lg: clamp(1.06rem, 1.02rem + 0.26vw, 1.22rem);
  --text-xl: clamp(1.75rem, 1.35rem + 0.82vw, 2.35rem);

  --color-bg: #f3eee7;
  --color-bg-deep: #e8ded0;
  --color-surface: #f8f4ed;
  --color-surface-2: #f1e8dd;
  --color-panel: rgba(255, 252, 247, 0.77);
  --color-panel-strong: rgba(255, 250, 244, 0.90);
  --color-border: rgba(84, 67, 48, 0.10);
  --color-text: #27211c;
  --color-muted: #7c7166;

  --color-primary: #0c5b63;
  --color-primary-2: #3d868d;
  --color-glacier: #8fd6d2;
  --color-accent: #cb9d60;
  --color-accent-soft: rgba(203, 157, 96, 0.12);

  --shadow-sm: 0 6px 18px rgba(60, 42, 27, 0.05);
  --shadow-md: 0 14px 38px rgba(35, 25, 17, 0.11);
  --shadow-lg: 0 24px 74px rgba(22, 15, 10, 0.15);

  --radius-md: 0.82rem;
  --radius-lg: 1rem;
  --radius-xl: 1.35rem;
  --radius-pill: 999px;

  --font-body: 'Satoshi', sans-serif;
  --transition: 220ms cubic-bezier(.16, 1, .3, 1);
}

/* RU: Light-theme specific contrast enhancements — stronger borders for interactive elements.
   EN: Light-theme contrast — stronger borders for interactive elements. */
[data-theme="light"] {
  /* Sidebar mode buttons — visible border by default, stronger on hover */
  .mode-link {
    border-color: rgba(84, 67, 48, 0.18);
  }
  .mode-link:hover {
    border-color: rgba(84, 67, 48, 0.35);
  }
  .mode-link.active {
    border-color: rgba(12, 91, 99, 0.5);
  }

  /* Room/conversation list items — visible border by default */
  .room-item {
    border-color: rgba(84, 67, 48, 0.14);
  }
  .room-item:hover {
    border-color: rgba(84, 67, 48, 0.28);
  }
  .room-item.active {
    border-color: rgba(103, 185, 181, 0.4);
  }

  /* Message bubbles — stronger border for better separation */
  .message-bubble {
    border-color: rgba(84, 67, 48, 0.12);
  }
  .message.message-own .message-bubble {
    border-color: rgba(103, 185, 181, 0.28);
  }

  /* Cards and panels — slightly stronger border */
  .card {
    border-color: rgba(84, 67, 48, 0.12);
  }
  .glass {
    border-color: rgba(84, 67, 48, 0.10);
  }

  /* Room tab bar (Комнаты / Диалоги) — visible tab styling */
  .room-tab {
    background: rgba(84, 67, 48, 0.06);
    border-color: rgba(84, 67, 48, 0.14);
    color: var(--color-text);
  }
  .room-tab:hover {
    background: rgba(84, 67, 48, 0.10);
    border-color: rgba(84, 67, 48, 0.25);
  }
  .room-tab.active {
    background: rgba(103, 185, 181, 0.12);
    border-color: rgba(103, 185, 181, 0.3);
    color: var(--color-primary);
  }

  /* Chat top bar — distinct background and bottom border */
  .chat-main-top {
    background: var(--color-surface);
    border-bottom-color: rgba(84, 67, 48, 0.18);
    padding-top: 8px;
  }

  /* Create room/dialog modals — clean light overlay and panel */
  .create-room-panel,
  .create-dialog-panel {
    border-color: rgba(84, 67, 48, 0.18);
    background: var(--color-bg-deep);
    box-shadow: 0 16px 48px rgba(60, 42, 27, 0.15);
  }
  .create-room-panel::before,
  .create-dialog-panel::before {
    background: rgba(243, 238, 231, 0.55);
  }
  .create-room-panel input,
  .create-room-panel textarea,
  .create-dialog-panel input {
    border-color: rgba(84, 67, 48, 0.2);
    background: var(--color-bg);
  }
  .create-room-panel input:focus,
  .create-room-panel textarea:focus,
  .create-dialog-panel input:focus {
    border-color: rgba(103, 185, 181, 0.4);
    box-shadow: 0 0 0 3px rgba(103, 185, 181, 0.15);
  }
}

[data-theme="dark"] {
  --color-bg: #0b0a09;
  --color-bg-deep: #14110f;
  --color-surface: #14110f;
  --color-surface-2: #1a1613;
  --color-panel: rgba(21, 18, 16, 0.80);
  --color-panel-strong: rgba(26, 22, 19, 0.93);
  --color-border: rgba(226, 220, 210, 0.07);
  --color-text: #eee3d7;
  --color-muted: #ab9d8d;

  --color-primary: #67b9b5;
  --color-primary-2: #236f78;
  --color-glacier: #9ce4dd;
  --color-accent: #d6a76c;
  --color-accent-soft: rgba(214, 167, 108, 0.10);

  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 14px 44px rgba(0, 0, 0, 0.32);
  --shadow-lg: 0 28px 96px rgba(0, 0, 0, 0.48);
}

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

html,
body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background:
    linear-gradient(rgba(10, 9, 8, 0.58), rgba(10, 9, 8, 0.70)),
    url("https://pplx-res.cloudinary.com/image/upload/pplx_search_images/836b73cc78c08edfae71ebc9853359c27c4d1128.jpg") center center / cover fixed no-repeat,
    radial-gradient(circle at 82% 10%, rgba(103, 185, 181, 0.10), transparent 18%),
    radial-gradient(circle at 14% 82%, rgba(214, 167, 108, 0.06), transparent 24%),
    radial-gradient(circle at 50% 0%, rgba(156, 228, 221, 0.06), transparent 28%),
    linear-gradient(180deg, var(--color-bg), var(--color-bg-deep));
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: 1.48;
  letter-spacing: -0.012em;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 78% 14%, rgba(103,185,181,.08), transparent 16%),
    radial-gradient(circle at 22% 88%, rgba(214,167,108,.05), transparent 20%);
  mix-blend-mode: screen;
  opacity: .8;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
  -webkit-appearance: none;
  appearance: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
}

textarea {
  resize: vertical;
}

.card {
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.glass {
  background:
    linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.008)),
    linear-gradient(135deg, rgba(103,185,181,.02), transparent 30%);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.muted {
  color: var(--color-muted);
}

.tiny {
  font-size: var(--text-xs);
}

h1,
h2,
h3 {
  line-height: 1.02;
  letter-spacing: -0.04em;
}

h1 {
  font-weight: 900;
}

h3 {
  font-weight: 700;
}

p {
  max-width: 60ch;
}

.brand-title {
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.22), transparent 35%),
    linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-weight: 900;
  box-shadow:
    0 0 0 1px rgba(255,255,255,.06),
    0 8px 20px rgba(0, 0, 0, 0.14);
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.20), transparent 36%),
    linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-weight: 900;
  box-shadow:
    0 0 0 1px rgba(255,255,255,.05),
    0 6px 18px rgba(0, 0, 0, 0.14);
}

.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.018)),
    linear-gradient(135deg, rgba(103,185,181,.03), transparent 55%);
  border: 1px solid var(--color-border);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.04),
    0 4px 12px rgba(0,0,0,.05);
  transition:
    transform var(--transition),
    background var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
  font-size: 0.85rem;
}

.icon-btn:hover {
  transform: translateY(-1px);
  background:
    linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.025)),
    linear-gradient(135deg, rgba(103,185,181,.05), transparent 55%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.05),
    0 8px 16px rgba(0,0,0,.08);
}

.primary-btn,
.secondary-btn {
  min-height: 36px;
  padding: 0.68rem 0.92rem;
  border-radius: 10px;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background var(--transition),
    border-color var(--transition);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: var(--text-sm);
}

.primary-btn {
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,.16), transparent 34%),
    linear-gradient(135deg, var(--color-primary), var(--color-primary-2));
  color: #fff;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.08),
    0 10px 18px rgba(38, 108, 111, 0.18);
}

.primary-btn:hover {
  transform: translateY(-1px);
}

.secondary-btn {
  border: 1px solid var(--color-border);
  background:
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.015)),
    linear-gradient(135deg, rgba(214,167,108,.02), transparent 50%);
}

.secondary-btn:hover {
  transform: translateY(-1px);
  background:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02)),
    linear-gradient(135deg, rgba(214,167,108,.03), transparent 50%);
}

.primary-btn.compact,
.secondary-btn.compact {
  min-height: 34px;
  padding: 0.58rem 0.82rem;
}