@import url('https://fonts.googleapis.com/css2?family=Comfortaa:wght@300;400;700&family=Prompt:wght@300&display=swap');

/* ─── Dark Theme (default) ─── */
:root {
  --bg-main: #0E121A;
  --bg-surface: #1A1F29;
  --bg-surface-light: #212733;
  --bg-card: #1C212A;
  --text-primary: #FFFFFF;
  --text-secondary: #8C96A8;
  --text-tertiary: #5A6478;
  --accent-blue: #4285F4;
  --accent-purple: #8A2BE2;
  --accent-gradient: linear-gradient(135deg, #4285F4, #8A2BE2);
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.04);
  --shadow: 0 2px 8px rgba(0,0,0,.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,.3);
  --shadow-glow: 0 4px 24px rgba(66,133,244,.15);
  --toast-bg: #212733;
  --skeleton: rgba(255,255,255,0.05);
  --header-hover: #fff;
  --focus-ring: rgba(255,255,255,.2);
}

/* ─── Light Theme ─── */
[data-theme="light"] {
  --bg-main: #F5F7FA !important;
  --bg-surface: #FFFFFF !important;
  --bg-surface-light: #F0F2F5 !important;
  --bg-card: #FFFFFF !important;
  --text-primary: #1D1E22 !important;
  --text-secondary: #757575 !important;
  --text-tertiary: #A0A4AB !important;
  --accent-blue: #3F51B5 !important;
  --accent-purple: #7C3AED !important;
  --accent-gradient: linear-gradient(135deg, #3F51B5, #7C3AED) !important;
  --border: rgba(0,0,0,0.08) !important;
  --border-light: rgba(0,0,0,0.04) !important;
  --shadow: 0 1px 3px rgba(0,0,0,.06) !important;
  --shadow-md: 0 4px 12px rgba(0,0,0,.08) !important;
  --shadow-glow: 0 4px 20px rgba(63,81,181,.15) !important;
  --toast-bg: #1D1E22 !important;
  --skeleton: rgba(0,0,0,0.05) !important;
  --header-hover: #1D1E22 !important;
  --focus-ring: rgba(0,0,0,.15) !important;
}

*, ::after, ::before { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Comfortaa', 'Golos Text', 'Inter', sans-serif;
  background: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }

/* ─── Header ─── */
.header {
  background: var(--bg-main);
  border-bottom: 1px solid var(--border);
  padding: 0 40px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header .logo {
  font-family: 'Prompt', sans-serif;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--text-primary);
  letter-spacing: -.01em;
  line-height: 1;
}
.header .nav-links { display: flex; align-items: center; gap: 32px; }
.header .nav-links a {
  color: var(--text-secondary);
  font-size: .9375rem;
  font-weight: 500;
  transition: color var(--t);
}
.header .nav-links a:hover { color: var(--header-hover); }

/* ─── Theme Toggle Switch ─── */
.theme-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 70px;
  height: 32px;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
}
.theme-switch input {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
  pointer-events: none;
}
.theme-switch .track {
  position: absolute;
  inset: 0;
  border-radius: 3px;
  background: #3A3F47;
  transition: background .3s ease;
  pointer-events: none;
}
.theme-switch input:checked ~ .track { background: linear-gradient(135deg, #4285F4, #8A2BE2); }
.theme-switch .thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 28px; height: 28px;
  border-radius: 2px;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,.3);
  transition: transform .3s ease;
  pointer-events: none;
}
.theme-switch input:checked ~ .thumb { transform: translateX(38px); }
.theme-switch .label-off {
  position: absolute;
  right: 10px; top: 50%; transform: translateY(-50%);
  font-size: .85rem;
  pointer-events: none;
  opacity: 1; transition: opacity .2s;
  color: rgba(255,255,255,.4);
}
.theme-switch input:checked ~ .label-off { opacity: 0; }
.theme-switch .label-on {
  position: absolute;
  left: 12px; top: 50%; transform: translateY(-50%);
  font-size: .85rem;
  pointer-events: none;
  opacity: 0; transition: opacity .2s;
  color: #fff;
}
.theme-switch input:checked ~ .label-on { opacity: 1; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: .9375rem;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: all var(--t);
  line-height: 1.2;
  white-space: nowrap;
}
.btn:hover { opacity: .9; transform: translateY(-1px); }
.btn:disabled { opacity: .4; cursor: not-allowed; transform: none; }
.btn-gradient { background: var(--accent-gradient); color: #fff; box-shadow: var(--shadow-glow); }
.btn-gradient:hover { box-shadow: 0 6px 32px rgba(66,133,244,.25); }
.btn-primary { background: var(--bg-surface-light); color: var(--text-primary); border: 1px solid var(--border); }
.btn-primary:hover { background: var(--bg-card); }
.btn-dark { background: #2A3040; color: #fff; border: 1px solid var(--border); }
.btn-dark:hover { background: #353D50; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: rgba(255,255,255,.2); color: var(--text-primary); }
.btn-sm { padding: 10px 24px; font-size: .875rem; }
.btn-lg { padding: 18px 40px; font-size: 1.0625rem; }

/* ─── Container ─── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }

/* ─── Typography ─── */
h1 { font-size: 3rem; font-weight: 700; letter-spacing: -.02em; line-height: 1.1; margin-bottom: 16px; }
h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 16px; }

/* ─── Breadcrumbs ─── */
.breadcrumbs { font-size: .875rem; color: var(--text-secondary); padding: 16px 0; }
.breadcrumbs a { color: var(--accent-blue); font-weight: 500; }
.breadcrumbs a:hover { opacity: .85; }

/* ─── Tag ─── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: .8125rem;
  font-weight: 500;
  background: var(--skeleton);
  color: var(--text-secondary);
}
.tag-green { color: #34D399; background: rgba(52,211,153,0.1); }
.tag-blue { color: #60A5FA; background: rgba(96,165,250,0.1); }
.tag-purple { color: #A78BFA; background: rgba(167,139,250,0.1); }
.tag-cyan { color: #22D3EE; background: rgba(34,211,238,0.1); }

/* ─── Card ─── */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--t);
}

/* ─── Footer ─── */
.footer {
  background: var(--bg-main);
  border-top: 1px solid var(--border);
  padding: 40px 48px;
  text-align: center;
  font-size: .875rem;
  color: var(--text-tertiary);
  margin-top: 80px;
}
.footer a { color: var(--accent-blue); font-weight: 500; }

/* ─── States ─── */
.loading-state { text-align: center; padding: 80px 20px; color: var(--text-secondary); }
.loading-state .spinner {
  display: inline-block;
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  margin-bottom: 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-state p { font-size: .9375rem; }
.empty-state { text-align: center; padding: 80px 20px; color: var(--text-secondary); }
.empty-state i { font-size: 48px; color: var(--border); margin-bottom: 16px; display: block; }
.empty-state p { font-size: .9375rem; }
.empty-state a { color: var(--accent-blue); }

/* ─── Toast ─── */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%; transform: translateX(-50%);
  background: var(--toast-bg);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-size: .875rem;
  z-index: 9999;
  font-weight: 500;
  border: 1px solid var(--border);
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.toast.show { opacity: 1; }
input, select, textarea { font-family: 'Comfortaa', 'Golos Text', 'Inter', sans-serif; }

@media (max-width: 768px) {
  .header { padding: 0 16px; height: 64px; }
  .header .logo { font-size: 1.25rem; }
  .header .nav-links { gap: 16px; }
  .header .nav-links a { font-size: .8125rem; }
  .container { padding: 0 16px; }
  h1 { font-size: 1.75rem; }
  .btn { padding: 12px 24px; font-size: .875rem; }
}