/* Page layout: modern reset, typography, ambient mesh glow, glass panels */
* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg, #090d16);
  color: var(--text, #ffffff);
  font-family: 'Plus Jakarta Sans', Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14.5px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

/* Ambient glow mesh in background */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  background: 
    radial-gradient(circle at 12% 18%, rgba(99, 102, 241, 0.16) 0%, transparent 45%),
    radial-gradient(circle at 88% 15%, rgba(139, 92, 246, 0.14) 0%, transparent 42%),
    radial-gradient(circle at 50% 85%, rgba(6, 182, 212, 0.1) 0%, transparent 55%),
    #090d16;
}

h1, h2, h3, h4, h5 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--text, #ffffff);
  letter-spacing: -0.02em;
  line-height: 1.25;
  font-weight: 750;
}

::selection {
  background: rgba(99, 102, 241, 0.45);
  color: #ffffff;
}

:focus-visible {
  outline: 2px solid var(--brand, #6366f1);
  outline-offset: 2px;
}

/* Modern minimalist dark scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.35);
  background-clip: content-box;
}

main {
  padding: 32px 28px 84px;
  max-width: 1180px;
  margin: 0 auto;
}

/* Glass panel */
.panel {
  background: rgba(18, 25, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--r-lg, 16px);
  padding: 24px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-2);
  transition: border-color var(--t), box-shadow var(--t);
}

.panel:hover {
  border-color: rgba(255, 255, 255, 0.22);
}

.panel h2 {
  font-size: 18px;
  font-weight: 750;
  margin: 0 0 14px;
  color: var(--text, #ffffff);
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-desc {
  margin: -6px 0 18px;
  color: var(--muted, #e2e8f0);
  font-size: 14px;
}

.row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field label {
  font-size: 13px;
  font-weight: 650;
  color: var(--muted, #e2e8f0);
  letter-spacing: 0.01em;
}

.checks {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.checks label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text, #ffffff);
  cursor: pointer;
  user-select: none;
}

.muted {
  color: #cbd5e1;
  font-size: 13.5px;
  line-height: 1.55;
}

.hidden {
  display: none !important;
}

.subtabs {
  margin-bottom: 20px !important;
}

/* Platform icon chip */
.pico {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  color: #ffffff;
  background: #334155;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.pico svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.pico-facebook {
  background: #1877f2;
  box-shadow: 0 2px 10px rgba(24, 119, 242, 0.4);
}

.pico-instagram {
  background: linear-gradient(45deg, #f09433, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888);
  box-shadow: 0 2px 10px rgba(220, 39, 67, 0.4);
}

.pico-youtube {
  background: #ff0033;
  box-shadow: 0 2px 10px rgba(255, 0, 51, 0.4);
}

.pico-twitter {
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
}

@media (max-width: 640px) {
  body { font-size: 14px; }
  main { padding: 20px 16px 64px; }
  .panel { padding: 18px; border-radius: var(--r); }
  .htabs { display: flex; overflow-x: auto; flex-wrap: nowrap; }
  .htab { flex: none; padding: 8px 14px; }
  .subtabs .ctab { padding: 7px 14px; font-size: 13px; }
  .toast { left: 16px; right: 16px; bottom: 16px; max-width: none; }
}