/* ===================================================================
   AWACP Design System — Tokens
   Air & Water Conditioning Products Inc. · est. 1960 · NYC
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,400;1,700&family=Inter:wght@300;400;500;600;700&family=Montserrat:wght@400;500;600;700&display=swap');

:root {
  /* ---------- Core palette ---------- */
  --awacp-navy:       #1B2A4A;   /* primary — deep, architectural */
  --awacp-navy-900:   #0F1A30;   /* darker — hero overlays, footer */
  --awacp-navy-800:   #15223D;
  --awacp-navy-700:   #1B2A4A;
  --awacp-navy-500:   #33436A;   /* muted navy for secondary surfaces */
  --awacp-navy-300:   #7A86A1;   /* navy-tinted body text on white */

  --awacp-copper:     #B8860B;   /* signature accent — rules, CTAs */
  --awacp-copper-bright: #D4A017; /* hover state */
  --awacp-copper-dim: #8B6508;   /* pressed */
  --awacp-copper-wash: #F4E9C8;  /* ultra-light wash for chips */

  --awacp-white:      #FFFFFF;
  --awacp-paper:      #FAF8F4;   /* warm off-white — editorial sections */
  --awacp-stone:      #F5F5F5;
  --awacp-line:       #E6E2D8;   /* warm rule line */
  --awacp-line-cool:  #D9DCE4;   /* cool rule line */

  --awacp-ink:        #1A1A1A;   /* body text */
  --awacp-ink-muted:  #5A5A5A;
  --awacp-ink-soft:   #8A8A8A;

  /* ---------- Semantic ---------- */
  --bg-primary: var(--awacp-white);
  --bg-canvas:  var(--awacp-paper);
  --bg-invert:  var(--awacp-navy-900);
  --fg-primary: var(--awacp-ink);
  --fg-muted:   var(--awacp-ink-muted);
  --fg-invert:  var(--awacp-white);
  --rule:       var(--awacp-line);
  --accent:     var(--awacp-copper);

  /* ---------- Type ---------- */
  --font-serif:  'Playfair Display', 'Times New Roman', Georgia, serif;
  --font-sans:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-label:  'Montserrat', 'Inter', sans-serif;

  /* Scale — editorial, generous */
  --t-display:   clamp(3.5rem, 7vw, 6.5rem);     /*   56–104 */
  --t-h1:        clamp(2.75rem, 5vw, 4.5rem);    /*   44–72  */
  --t-h2:        clamp(2rem, 3.5vw, 3rem);       /*   32–48  */
  --t-h3:        1.75rem;                         /*   28     */
  --t-h4:        1.25rem;                         /*   20     */
  --t-body-lg:   1.125rem;                        /*   18     */
  --t-body:      1rem;                            /*   16     */
  --t-small:     0.875rem;                        /*   14     */
  --t-micro:     0.75rem;                         /*   12     */

  /* Leading */
  --lh-tight:   1.05;
  --lh-display: 1.08;
  --lh-snug:    1.25;
  --lh-body:    1.6;

  /* Letter-spacing (labels use wide tracking — editorial feel) */
  --ls-label:   0.18em;
  --ls-label-sm:0.12em;
  --ls-tight:  -0.02em;

  /* ---------- Space ---------- */
  --s-1:  4px;
  --s-2:  8px;
  --s-3:  12px;
  --s-4:  16px;
  --s-5:  24px;
  --s-6:  32px;
  --s-7:  48px;
  --s-8:  64px;
  --s-9:  96px;
  --s-10: 128px;
  --s-11: 160px;

  /* ---------- Radii — restrained. Architectural. ---------- */
  --r-none: 0;
  --r-sm:   2px;
  --r-md:   4px;
  --r-pill: 999px;

  /* ---------- Shadows — subtle, never glowy ---------- */
  --shadow-sm: 0 1px 2px rgba(15, 26, 48, 0.06), 0 1px 1px rgba(15, 26, 48, 0.04);
  --shadow-md: 0 8px 24px -8px rgba(15, 26, 48, 0.12), 0 2px 4px rgba(15, 26, 48, 0.04);
  --shadow-lg: 0 24px 48px -16px rgba(15, 26, 48, 0.18), 0 4px 8px rgba(15, 26, 48, 0.06);
  --shadow-hero: 0 40px 80px -20px rgba(15, 26, 48, 0.4);

  /* ---------- Layout ---------- */
  --container:    1360px;
  --container-narrow: 960px;
  --gutter:       clamp(20px, 4vw, 48px);

  /* ---------- Motion ---------- */
  --ease-out:  cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast:  160ms;
  --dur-base:  240ms;
  --dur-slow:  480ms;
}

/* ===================================================================
   Base / Reset
   =================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: var(--lh-body);
  color: var(--fg-primary);
  background: var(--bg-primary);
}

img, video { max-width: 100%; display: block; }

/* ===================================================================
   Typography classes
   =================================================================== */

.u-display {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--t-display);
  line-height: var(--lh-display);
  letter-spacing: var(--ls-tight);
  color: var(--fg-primary);
}

.u-h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--t-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
}

.u-h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--t-h2);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
}

.u-h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--t-h3);
  line-height: var(--lh-snug);
}

.u-h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--t-h4);
  line-height: var(--lh-snug);
}

.u-eyebrow {
  font-family: var(--font-label);
  font-size: var(--t-micro);
  font-weight: 600;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--accent);
}

.u-label {
  font-family: var(--font-label);
  font-size: var(--t-small);
  font-weight: 500;
  letter-spacing: var(--ls-label-sm);
  text-transform: uppercase;
}

.u-body-lg {
  font-family: var(--font-sans);
  font-size: var(--t-body-lg);
  line-height: var(--lh-body);
  color: var(--fg-muted);
}

.u-body { font-family: var(--font-sans); font-size: var(--t-body); line-height: var(--lh-body); color: var(--fg-muted); }

.u-small { font-size: var(--t-small); color: var(--fg-muted); }

/* ===================================================================
   Utility — container, rule, inverse
   =================================================================== */

.u-container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.u-container-narrow { width: 100%; max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--gutter); }

.u-hairline { height: 1px; background: var(--rule); border: 0; margin: 0; }
.u-hairline-copper { height: 2px; width: 48px; background: var(--accent); border: 0; margin: 0; }

.u-invert { background: var(--bg-invert); color: var(--fg-invert); }
.u-invert .u-body, .u-invert .u-body-lg { color: rgba(255,255,255,0.72); }

/* ===================================================================
   Components — Buttons, Chips, Cards
   =================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: var(--ls-label-sm);
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--r-none);
  cursor: pointer;
  transition: all var(--dur-base) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--awacp-copper);
  color: var(--awacp-white);
}
.btn--primary:hover { background: var(--awacp-copper-bright); transform: translateY(-1px); }

.btn--navy {
  background: var(--awacp-navy);
  color: var(--awacp-white);
}
.btn--navy:hover { background: var(--awacp-navy-900); }

.btn--outline {
  background: transparent;
  color: var(--fg-primary);
  border-color: var(--awacp-navy);
}
.btn--outline:hover { background: var(--awacp-navy); color: var(--awacp-white); }

.btn--outline-invert {
  background: transparent;
  color: var(--awacp-white);
  border-color: rgba(255,255,255,0.4);
}
.btn--outline-invert:hover { background: var(--awacp-white); color: var(--awacp-navy); border-color: var(--awacp-white); }

.btn--ghost {
  background: transparent;
  color: var(--awacp-copper);
  padding: 8px 0;
}
.btn--ghost::after {
  content: ''; width: 18px; height: 1px; background: currentColor; display: inline-block;
  transition: width var(--dur-base) var(--ease-out);
}
.btn--ghost:hover::after { width: 28px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: var(--ls-label-sm);
  text-transform: uppercase;
  background: var(--awacp-copper-wash);
  color: var(--awacp-copper-dim);
  border-radius: var(--r-pill);
}
.chip--navy { background: rgba(27,42,74,0.08); color: var(--awacp-navy); }
.chip--line { background: transparent; color: var(--fg-muted); border: 1px solid var(--rule); }

/* Numbered stat */
.stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.stat__num {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 5vw, 4rem);
  font-weight: 500;
  line-height: 1;
  color: var(--awacp-navy);
  letter-spacing: -0.02em;
}
.stat__num .unit {
  font-family: var(--font-serif);
  font-size: 0.45em;
  color: var(--awacp-copper);
  margin-left: 4px;
  font-style: italic;
}
.stat__label {
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--fg-muted);
}

/* ===================================================================
   Section label pattern — copper bar + eyebrow
   =================================================================== */

.section-label {
  display: flex; align-items: center; gap: 16px;
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--awacp-copper);
}
.section-label::before {
  content: ''; width: 32px; height: 2px; background: var(--awacp-copper);
}