/* ═══════════════════════════════════════════════════════════════════════════
   GRAPHITE TECH & LIQUID GLASS DESIGN SYSTEM v3
   Inspired by mtips5s_motions (Linear / Vercel / Apple glassmorphism)
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  /* Brand — Electric Indigo */
  --primary: #5E6AD2;
  --primary-hover: #6B76E5;
  --primary-dark: #9AA2F2;
  --primary-light: rgba(94, 106, 210, 0.22);
  --primary-50: rgba(94, 106, 210, 0.13);

  /* Background & Graphite Surfaces */
  --background: #0A0A0C;
  --surface: #17171A;
  --surface-2: #1C1C21;
  --surface-3: #26262C;
  --foreground: #F7F8F8;

  /* Inverted Ink Hierarchy */
  --ink: #F7F8F8;
  --ink-2: #8A8F98;
  --ink-3: #62666D;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.16);
  --line-focus: rgba(94, 106, 210, 0.55);

  /* Liquid Glass Materials */
  --glass-bg: rgba(20, 20, 23, 0.72);
  --glass-bg-soft: rgba(20, 20, 23, 0.52);
  --glass-bg-solid: rgba(24, 24, 28, 0.96);
  --glass-edge: inset 0 1px 0 rgba(255, 255, 255, 0.08);

  /* Status Colors */
  --color-success: #4CC38A;
  --color-success-light: rgba(76, 195, 138, 0.13);
  --color-warning: #F2C94C;
  --color-warning-light: rgba(242, 201, 76, 0.13);
  --color-danger: #EB5757;
  --color-danger-light: rgba(235, 87, 87, 0.13);
  --color-info: #5294E2;
  --color-info-light: rgba(82, 148, 226, 0.13);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-title: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Shadows */
  --shadow-island: 0 8px 30px rgba(0, 0, 0, 0.45);
  --shadow-island-lg: 0 24px 64px rgba(0, 0, 0, 0.55);
  --shadow-pill: 0 4px 18px rgba(94, 106, 210, 0.38), 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 2px 4px rgba(0, 0, 0, 0.45), 0 14px 40px rgba(0, 0, 0, 0.5);
  --shadow-dropdown: 0 12px 40px rgba(0, 0, 0, 0.6), 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 32px 90px rgba(0, 0, 0, 0.7);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-pill: 9999px;

  /* Motion & Spring Physics */
  --spring: cubic-bezier(0.32, 0.72, 0, 1);
  --transition-fast: 0.15s ease;
  --transition-spring: 0.28s var(--spring);

  /* ── Backward Compatibility with --ig-* naming ───────────────────────── */
  --ig-bg: var(--background);
  --ig-bg-alt: var(--surface-2);
  --ig-surface: var(--surface);
  --ig-surface-2: var(--surface-2);
  --ig-border: var(--line);
  --ig-border-active: var(--line-2);
  --ig-text: var(--ink);
  --ig-text-soft: #D3D6DC;
  --ig-muted: var(--ink-2);
  --ig-subtle: var(--ink-3);
  --ig-brand: var(--primary);
  --ig-brand-soft: var(--primary-hover);
  --ig-brand-muted: var(--primary-dark);
  --ig-success: var(--color-success);
  --ig-warning: var(--color-warning);
  --ig-danger: var(--color-danger);
  --ig-radius: var(--radius-md);
  --ig-radius-sm: var(--radius-sm);
  --ig-shadow: var(--shadow-island-lg);
  --ig-font: var(--font-sans);
  --ig-mono: var(--font-mono);
}

/* ── Base resets & Dark theme background ───────────────────────────────── */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Signature Graphite Dark: Than chì + dual radial indigo/cyan */
  background:
    radial-gradient(55% 45% at 85% -8%, rgba(94, 106, 210, 0.14), transparent 62%),
    radial-gradient(45% 40% at 8% 108%, rgba(64, 143, 227, 0.08), transparent 60%),
    linear-gradient(180deg, #0B0B0E 0%, #09090B 100%);
  background-attachment: fixed;
}

/* ── Scrollbars ────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.24);
}

/* ── Micro-press Interaction ───────────────────────────────────────────── */
.press {
  transition: transform 0.15s ease-out;
}
.press:active {
  transform: scale(0.97);
}

/* ── Glass Components ─────────────────────────────────────────────────── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  border: 1px solid var(--line);
  box-shadow: var(--glass-edge);
}

.glass-soft {
  background: var(--glass-bg-soft);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border: 1px solid var(--line);
}

.glass-pop {
  background: var(--glass-bg-solid);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  border: 1px solid var(--line-2);
  box-shadow: var(--glass-edge), var(--shadow-dropdown);
}

/* ── Shell Container ───────────────────────────────────────────────────── */
.ig-shell {
  width: min(1360px, calc(100vw - 48px));
  margin: 0 auto;
  padding: 24px 0 64px;
  animation: fadeIn 0.3s var(--spring);
}

/* ── Topbar, Panel, Drawer, Modal Base ──────────────────────────────────── */
.ig-topbar,
.ig-panel,
.ig-drawer,
.ig-modal {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  box-shadow: var(--glass-edge), var(--shadow-card);
}

.ig-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ig-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.ig-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 34px;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, #6B76E5 0%, #5E6AD2 100%);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  box-shadow: var(--shadow-pill), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transition: transform 0.15s ease;
}

.ig-brand-mark:hover {
  transform: translateY(-1px);
}

.ig-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink-2);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.18s var(--spring);
}

.ig-icon-btn:hover {
  border-color: var(--line-2);
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  transform: translateY(-1px);
}

.ig-icon-btn:active {
  transform: scale(0.96);
}

/* ── Metrics Grid ──────────────────────────────────────────────────────── */
.ig-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.ig-metric {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  padding: 14px 16px;
  box-shadow: var(--glass-edge);
  transition: all 0.22s var(--spring);
  overflow: hidden;
}

.ig-metric:hover {
  border-color: rgba(94, 106, 210, 0.4);
  background: rgba(94, 106, 210, 0.06);
  transform: translateY(-2px);
  box-shadow: var(--glass-edge), 0 8px 24px rgba(0, 0, 0, 0.4);
}

.ig-metric strong {
  display: block;
  font: 700 26px/1.1 var(--font-mono);
  letter-spacing: -0.02em;
  color: var(--ink);
}

.ig-metric span {
  display: block;
  margin-top: 6px;
  color: var(--ink-2);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── Panel Header & Structure ─────────────────────────────────────────── */
.ig-panel {
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.ig-panel-head,
.ig-toolbar,
.ig-chat-head {
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  padding: 12px 16px;
}

.ig-panel-title {
  flex: 1;
  min-width: 0;
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ── Badges & Chips ────────────────────────────────────────────────────── */
.ig-chip,
.ig-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink-2);
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 600;
  transition: all 0.18s var(--spring);
}

.ig-chip:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--ink);
  border-color: var(--line-2);
}

.ig-badge.ok {
  background: var(--color-success-light);
  border-color: rgba(76, 195, 138, 0.3);
  color: var(--color-success);
}

.ig-badge.warn {
  background: var(--color-warning-light);
  border-color: rgba(242, 201, 76, 0.3);
  color: var(--color-warning);
}

.ig-badge.bad {
  background: var(--color-danger-light);
  border-color: rgba(235, 87, 87, 0.3);
  color: var(--color-danger);
}

/* ── Floating Action Button (FAB) ──────────────────────────────────────── */
.ig-fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px;
  height: 52px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  background: linear-gradient(180deg, #6B76E5 0%, #5E6AD2 100%);
  color: #fff;
  font-size: 18px;
  box-shadow: var(--shadow-pill), 0 8px 32px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s var(--spring);
}

.ig-fab:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 24px rgba(94, 106, 210, 0.5), 0 2px 4px rgba(0, 0, 0, 0.4);
}

.ig-fab:active {
  transform: scale(0.95);
}

/* ── Responsive Shell ──────────────────────────────────────────────────── */
@media (max-width: 720px) {
  .ig-shell {
    width: min(100vw - 20px, 100%);
    padding-top: 14px;
  }
  .ig-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}