/* Diamond Group — design tokens & base */
:root {
  /* Default: Variant A — Neutral Dark */
  --bg: #1E1E2E;
  --bg-2: #252538;
  --bg-3: #2D2D42;
  --fg: #ECEBF5;
  --fg-dim: #B4B2C8;
  --fg-mute: #7F7D94;
  --line: rgba(255,255,255,.08);
  --line-strong: rgba(255,255,255,.14);

  /* Brand accent (variant-overridable) */
  --accent-h: 255;
  --accent: oklch(68% .14 var(--accent-h));
  --accent-2: oklch(74% .12 calc(var(--accent-h) + 20));
  --accent-3: oklch(72% .16 calc(var(--accent-h) + 70));
  --accent-soft: color-mix(in oklch, var(--accent) 25%, transparent);

  /* Service identity gradients */
  --grad-cleaning: linear-gradient(135deg,#6366F1,#8B5CF6);
  --grad-hood:     linear-gradient(135deg,#8B5CF6,#EC4899);
  --grad-products: linear-gradient(135deg,#0EA5E9,#6366F1);
  --grad-ddd:      linear-gradient(135deg,#10B981,#059669);
  --grad-security: linear-gradient(135deg,#F59E0B,#EF4444);

  /* Glass */
  --glass-alpha: 0.05;
  --glass-blur: 14px;
  --glass-bg: rgba(255,255,255,var(--glass-alpha));
  --glass-border: rgba(255,255,255,.09);
  --glass-shadow: 0 18px 50px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.05);

  /* Radii & spacing */
  --r-sm: 8px; --r-md: 14px; --r-lg: 20px; --r-xl: 28px; --r-pill: 999px;
  --maxw: 1200px;

  /* Motion */
  --ease: cubic-bezier(.22,.61,.36,1);
  --dur-fast: 150ms;
  --dur: 250ms;
  --dur-slow: 400ms;
  --anim-scale: 1;       /* Tweaks can damp this toward 0 */

  /* Type */
  --f-head: 'Outfit', ui-sans-serif, system-ui, sans-serif;
  --f-body: 'DM Sans', ui-sans-serif, system-ui, sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* ============================================================
   THEME VARIANTS — each with matched light + dark
   A = Neutral   B = Warm   C = Cool (Navy/Teal)
   ============================================================ */

/* ---------- A · Neutral DARK ---------- */
:root[data-variant="A"][data-theme="dark"],
:root[data-theme="dark"]:not([data-variant]) {
  --bg: #1E1E2E; --bg-2: #252538; --bg-3: #2D2D42;
  --fg: #ECEBF5; --fg-dim: #B4B2C8; --fg-mute: #7F7D94;
  --line: rgba(255,255,255,.08); --line-strong: rgba(255,255,255,.14);
  --accent-h: 255; --accent: oklch(74% .08 260); --accent-2: oklch(80% .06 270); --accent-3: oklch(85% .04 250);
  --glass-alpha: 0.05; --glass-blur: 14px;
  --glass-bg: rgba(255,255,255,.05);
  --glass-border: rgba(255,255,255,.10);
  --glass-shadow: 0 18px 50px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.05);
}
/* ---------- A · Neutral LIGHT ---------- */
:root[data-variant="A"][data-theme="light"],
:root[data-theme="light"]:not([data-variant]) {
  --bg: #F4F4F7; --bg-2: #ECECF0; --bg-3: #E2E2E8;
  --fg: #1B1B22; --fg-dim: #52525C; --fg-mute: #8A8A95;
  --line: rgba(20,20,30,.08); --line-strong: rgba(20,20,30,.16);
  --accent: #1B1B22; --accent-2: #3A3A46; --accent-3: #52525C;
  --glass-alpha: 0.70; --glass-blur: 10px;
  --glass-bg: rgba(255,255,255,.72);
  --glass-border: rgba(20,20,30,.08);
  --glass-shadow: 0 18px 50px rgba(20,20,30,.08), inset 0 1px 0 rgba(255,255,255,.9);
}

/* ---------- B · Warm DARK ---------- */
:root[data-variant="B"][data-theme="dark"] {
  --bg: #1F1B16; --bg-2: #27221B; --bg-3: #2F2921;
  --fg: #F3EDE0; --fg-dim: #C6BAA5; --fg-mute: #8D8474;
  --line: rgba(247,220,180,.08); --line-strong: rgba(247,220,180,.14);
  --accent: oklch(78% .11 75); --accent-2: oklch(82% .10 60); --accent-3: oklch(72% .14 45);
  --glass-alpha: 0.05; --glass-blur: 14px;
  --glass-bg: rgba(247,220,180,.05);
  --glass-border: rgba(247,220,180,.10);
  --glass-shadow: 0 18px 50px rgba(0,0,0,.30), inset 0 1px 0 rgba(247,220,180,.06);
}
/* ---------- B · Warm LIGHT ---------- */
:root[data-variant="B"][data-theme="light"] {
  --bg: #FAF6EF; --bg-2: #F3ECDE; --bg-3: #EBE2CF;
  --fg: #2A241C; --fg-dim: #5E523F; --fg-mute: #958871;
  --line: rgba(94,82,63,.10); --line-strong: rgba(94,82,63,.20);
  --accent: oklch(55% .12 55); --accent-2: oklch(62% .11 45); --accent-3: oklch(68% .14 35);
  --glass-alpha: 0.65; --glass-blur: 10px;
  --glass-bg: rgba(255,249,235,.70);
  --glass-border: rgba(94,82,63,.12);
  --glass-shadow: 0 18px 50px rgba(94,82,63,.10), inset 0 1px 0 rgba(255,255,255,.8);
}

/* ---------- C · Cool DARK (navy/teal) ---------- */
:root[data-variant="C"][data-theme="dark"] {
  --bg: #16202E; --bg-2: #1C283A; --bg-3: #243248;
  --fg: #E6EEF7; --fg-dim: #A7B8CC; --fg-mute: #6F829A;
  --line: rgba(170,210,240,.08); --line-strong: rgba(170,210,240,.16);
  --accent: oklch(70% .12 200); --accent-2: oklch(76% .10 210); --accent-3: oklch(66% .14 220);
  --glass-alpha: 0.06; --glass-blur: 16px;
  --glass-bg: rgba(170,210,240,.06);
  --glass-border: rgba(170,210,240,.12);
  --glass-shadow: 0 18px 50px rgba(6,16,30,.45), inset 0 1px 0 rgba(170,210,240,.06);
}
/* ---------- C · Cool LIGHT ---------- */
:root[data-variant="C"][data-theme="light"] {
  --bg: #F2F5F9; --bg-2: #E7ECF3; --bg-3: #DAE2EB;
  --fg: #0F1D2E; --fg-dim: #3E5268; --fg-mute: #7A8BA0;
  --line: rgba(15,29,46,.10); --line-strong: rgba(15,29,46,.20);
  --accent: oklch(52% .13 210); --accent-2: oklch(60% .12 200); --accent-3: oklch(46% .14 220);
  --glass-alpha: 0.70; --glass-blur: 10px;
  --glass-bg: rgba(255,255,255,.72);
  --glass-border: rgba(15,29,46,.10);
  --glass-shadow: 0 18px 50px rgba(15,29,46,.10), inset 0 1px 0 rgba(255,255,255,.9);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { color-scheme: dark; }
:root[data-theme="light"] { color-scheme: light; }

body {
  font-family: var(--f-body);
  color: var(--fg);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Ambient background — tuned per theme */
.ambient {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: var(--bg);
}
:root[data-theme="dark"] .ambient {
  background:
    radial-gradient(60% 40% at 15% 10%, color-mix(in oklch, var(--accent) 22%, transparent), transparent 60%),
    radial-gradient(50% 40% at 90% 20%, color-mix(in oklch, var(--accent-3) 18%, transparent), transparent 65%),
    radial-gradient(70% 50% at 50% 100%, color-mix(in oklch, var(--accent-2) 15%, transparent), transparent 60%),
    var(--bg);
}
:root[data-theme="light"] .ambient {
  background:
    radial-gradient(60% 40% at 15% 10%, color-mix(in oklch, var(--accent) 10%, transparent), transparent 60%),
    radial-gradient(70% 50% at 85% 90%, color-mix(in oklch, var(--accent-3) 8%, transparent), transparent 60%),
    var(--bg);
}

h1,h2,h3,h4 { font-family: var(--f-head); font-weight: 800; letter-spacing: -.02em; margin: 0; line-height: 1.05; }
h1 { font-size: clamp(44px, 7vw, 88px); }
h2 { font-size: clamp(32px, 4.2vw, 56px); }
h3 { font-size: clamp(22px, 2.2vw, 30px); }
p { margin: 0; }
a { color: inherit; text-decoration: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--fg-dim);
  padding: 8px 14px; border-radius: var(--r-pill);
  border: 1px solid var(--line); background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
}
.eyebrow::before {
  content:""; width:6px; height:6px; border-radius:50%;
  background: var(--accent); box-shadow: 0 0 12px var(--accent);
}

/* Glass */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur)) saturate(140%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(140%);
  border-radius: var(--r-lg);
  box-shadow: var(--glass-shadow);
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: var(--r-pill);
  font-family: var(--f-head); font-weight: 600; font-size: 15px;
  cursor: pointer; border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: white;
  background: linear-gradient(120deg, var(--accent), var(--accent-3));
  box-shadow: 0 10px 30px color-mix(in oklch, var(--accent) 40%, transparent);
}
.btn-primary:hover { box-shadow: 0 14px 38px color-mix(in oklch, var(--accent) 55%, transparent); }
.btn-ghost {
  color: var(--fg); background: var(--glass-bg); border-color: var(--glass-border);
  backdrop-filter: blur(var(--glass-blur));
}
.btn-ghost:hover { border-color: var(--line-strong); }

/* Chips */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: var(--r-pill);
  font-size: 12px; font-family: var(--f-mono); letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-dim); border: 1px solid var(--line); background: var(--glass-bg);
}

/* Utility */
.row { display: flex; gap: 16px; flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.grid { display: grid; gap: 20px; }
.muted { color: var(--fg-dim); }
.mono { font-family: var(--f-mono); }
.hidden-sm { }
@media (max-width: 767px) { .hidden-sm { display: none !important; } }

/* Scroll reveal — variants */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity calc(800ms * var(--anim-scale)) var(--ease), transform calc(800ms * var(--anim-scale)) var(--ease); will-change: transform, opacity; }
[data-reveal="fade"] { transform: none; }
[data-reveal="left"] { transform: translateX(-32px); }
[data-reveal="right"] { transform: translateX(32px); }
[data-reveal="scale"] { transform: scale(.94); }
[data-reveal="blur"] { filter: blur(10px); transition: opacity calc(800ms * var(--anim-scale)) var(--ease), transform calc(800ms * var(--anim-scale)) var(--ease), filter calc(800ms * var(--anim-scale)) var(--ease); }
[data-reveal].in { opacity: 1; transform: none; filter: none; }

/* Stagger children */
[data-stagger] > * { opacity: 0; transform: translateY(20px); transition: opacity calc(700ms * var(--anim-scale)) var(--ease), transform calc(700ms * var(--anim-scale)) var(--ease); }
[data-stagger].in > * { opacity: 1; transform: none; }
[data-stagger].in > *:nth-child(1) { transition-delay: calc(0ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(2) { transition-delay: calc(80ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(3) { transition-delay: calc(160ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(4) { transition-delay: calc(240ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(5) { transition-delay: calc(320ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(6) { transition-delay: calc(400ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(7) { transition-delay: calc(480ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(8) { transition-delay: calc(560ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(9) { transition-delay: calc(640ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(10) { transition-delay: calc(720ms * var(--anim-scale)); }
[data-stagger].in > *:nth-child(n+11) { transition-delay: calc(800ms * var(--anim-scale)); }

/* Page entry */
@keyframes pageEnter { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
body { animation: pageEnter calc(500ms * var(--anim-scale)) var(--ease) both; }

/* Hover lift — generic */
.lift { transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.lift:hover { transform: translateY(-4px); }

/* Aurora blobs — shared motion */
@keyframes drift1 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(20px,-14px) scale(1.08); } }
@keyframes drift2 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-18px,12px) scale(1.1); } }
.svc-card .aurora { animation: drift1 calc(14s / var(--anim-scale, 1)) ease-in-out infinite; }
.svc-card:nth-child(even) .aurora { animation-name: drift2; }

/* Gentle breathing on brand logo */
.nav-logo { animation: breathe calc(6s / var(--anim-scale, 1)) ease-in-out infinite; }
@keyframes breathe { 0%,100% { filter: brightness(1); } 50% { filter: brightness(1.15); } }

/* Section spacing */
section { padding: clamp(72px, 10vw, 140px) 0; position: relative; }
section.tight { padding: clamp(48px, 6vw, 90px) 0; }

/* Gradient text */
.grad-text {
  background: linear-gradient(120deg, var(--accent), var(--accent-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}