/* ============================================
   TechFire AI — Nico Landing (refined)
   Editorial / print-inspired direction
   --------------------------------------------
   System:
   - Type scale: modular 1.25 (major third) on Inter,
     Playfair Display only as accent / italic display.
   - Spacing scale: 4 / 8 / 12 / 16 / 24 / 32 / 48 /
     64 / 96 / 128 / 160 / 200.
   - Color: cream paper, near-black ink, single warm
     vermilion accent. No gradients, no shadows.
   ============================================ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* ---- TYPE ---- */
  --font-serif: 'Playfair Display', 'Iowan Old Style', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Modular scale, base 16, ratio 1.25 */
  --fs-50:  0.75rem;    /* 12 — small caps labels */
  --fs-75:  0.8125rem;  /* 13 — fine print */
  --fs-100: 0.9375rem;  /* 15 — body small */
  --fs-200: 1rem;       /* 16 — body */
  --fs-300: 1.125rem;   /* 18 — lead */
  --fs-400: 1.375rem;   /* 22 — h4 */
  --fs-500: 1.75rem;    /* 28 — h3 */
  --fs-600: 2.25rem;    /* 36 */
  --fs-700: 3rem;       /* 48 — h2 */
  --fs-800: 4rem;       /* 64 */
  --fs-900: 5.25rem;    /* 84 — display */
  --fs-1000: 7rem;      /* 112 — hero */

  --lh-tight:  1.05;
  --lh-snug:   1.18;
  --lh-normal: 1.55;
  --lh-loose:  1.7;

  --tracking-tight:  -0.022em;
  --tracking-snug:   -0.012em;
  --tracking-normal:  0;
  --tracking-wide:    0.06em;
  --tracking-wider:   0.14em;
  --tracking-widest:  0.22em;

  /* ---- SPACING SCALE ---- */
  --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;
  --s-12: 200px;

  /* ---- COLOR ---- */
  --paper:        #f4f0e6;   /* cream — primary background */
  --paper-soft:   #ebe6d8;   /* warmer alt panel */
  --paper-deep:   #e3ddcb;   /* deepest cream */
  --ink:          #14110d;   /* near-black w/ warmth */
  --ink-soft:     #2a2620;
  --ink-mute:     #5b5448;
  --ink-faint:    #8a8273;
  --rule:         #cdc6b3;   /* hairline divider */
  --rule-soft:    #ddd6c1;

  --accent:        #d94a14;  /* vermilion — slightly deepened from #ff5600 for paper bg */
  --accent-deep:   #a8350a;
  --accent-soft:   rgba(217, 74, 20, 0.10);

  --term-bg:       #16130e;
  --term-ink:      #e6dec6;

  /* ---- LAYOUT ---- */
  --measure:       66ch;          /* ideal line length */
  --measure-narrow: 52ch;
  --content-max:   1240px;
  --content-pad:   clamp(20px, 4vw, 56px);

  /* ---- MOTION ---- */
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast:    180ms;
  --t-normal:  340ms;
  --t-slow:    640ms;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern", "liga", "calt";
  scroll-padding-top: 96px;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--fs-200);
  line-height: var(--lh-normal);
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;

  /* subtle paper grain — pure CSS, no images */
  background-image:
    radial-gradient(rgba(20, 17, 13, 0.018) 1px, transparent 1px),
    radial-gradient(rgba(20, 17, 13, 0.014) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1px 2px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

::selection {
  background: var(--accent);
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ============================================
   NAV
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: var(--s-4) var(--content-pad);
  transition: background var(--t-normal) var(--ease-out),
              border-color var(--t-normal) var(--ease-out),
              padding var(--t-normal) var(--ease-out);
}

.nav.scrolled {
  background: rgba(244, 240, 230, 0.88);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  border-bottom: 1px solid var(--rule);
  padding-top: var(--s-3);
  padding-bottom: var(--s-3);
}

.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
}

.nav-logo {
  font-family: var(--font-sans);
  font-size: var(--fs-300);
  font-weight: 600;
  letter-spacing: var(--tracking-snug);
  display: inline-flex;
  align-items: baseline;
}

.logo-tech { color: var(--ink); }
.logo-fire { color: var(--accent); font-weight: 600; }
.logo-ai   { color: var(--ink-mute); font-weight: 400; margin-left: 1px; }

.nav-links {
  display: flex;
  gap: var(--s-7);
}

.nav-links a {
  font-size: var(--fs-75);
  font-weight: 400;
  color: var(--ink-soft);
  letter-spacing: var(--tracking-snug);
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 0;
  transition: color var(--t-fast) var(--ease-out);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-faint);
  font-feature-settings: "tnum";
  letter-spacing: 0;
  transition: color var(--t-fast) var(--ease-out);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 2px;
  height: 1px;
  background: var(--ink);
  transition: right var(--t-normal) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.is-current {
  color: var(--ink);
}

.nav-links a:hover::after,
.nav-links a.is-current::after {
  right: 0;
}

.nav-links a:hover .nav-num,
.nav-links a.is-current .nav-num {
  color: var(--accent);
}

.nav-cta {
  display: flex;
  gap: var(--s-3);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  font-family: var(--font-sans);
  font-size: var(--fs-100);
  font-weight: 500;
  letter-spacing: var(--tracking-snug);
  padding: 14px 26px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--t-normal) var(--ease-out),
              color var(--t-normal) var(--ease-out),
              border-color var(--t-normal) var(--ease-out),
              transform var(--t-normal) var(--ease-out);
  min-height: 44px;
  border-radius: 0; /* hard-edge editorial */
}

.btn-sm {
  font-size: var(--fs-75);
  padding: 10px 18px;
  min-height: 40px;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ============================================
   COMMON SECTION SCAFFOLDING
   ============================================ */
.section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--s-12) var(--content-pad);
  position: relative;
}

.section + .section {
  border-top: 1px solid var(--rule);
}

.section-head {
  max-width: 760px;
  margin-bottom: var(--s-9);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-sans);
  font-size: var(--fs-50);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: var(--s-6);
}

.label-mark {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: var(--tracking-wide);
  padding-right: var(--s-3);
  border-right: 1px solid var(--rule);
  font-feature-settings: "tnum";
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.25rem, 5.2vw, var(--fs-800));
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  font-variation-settings: "opsz" 48;
  font-feature-settings: "kern", "liga", "dlig";
  margin-bottom: var(--s-6);
}

.section-title em {
  font-style: italic;
  color: var(--accent);
  font-variation-settings: "opsz" 96;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(140px, 18vh, 220px) var(--content-pad) var(--s-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.hero-schematic {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.55;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at 65% 50%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 65% 50%, #000 30%, transparent 75%);
}

.schematic-svg {
  width: 100%;
  height: 100%;
}

.schematic-lines line {
  stroke: var(--ink);
  stroke-opacity: 0.18;
}

.schematic-nodes circle {
  fill: var(--ink);
  fill-opacity: 0.35;
}
.schematic-nodes circle.node-accent {
  fill: var(--accent);
  fill-opacity: 0.55;
  animation: nodePulse 3.6s var(--ease-in-out) infinite;
}
.schematic-nodes circle.node-accent:nth-child(4) { animation-delay: 0.8s; }
.schematic-nodes circle.node-accent:nth-child(7) { animation-delay: 1.6s; }
.schematic-nodes circle.node-accent:nth-child(8) { animation-delay: 2.4s; }

@keyframes nodePulse {
  0%, 100% { fill-opacity: 0.35; r: 5; }
  50%      { fill-opacity: 0.85; r: 6; }
}

.pulse-dot {
  fill: var(--accent);
  filter: drop-shadow(0 0 4px rgba(217, 74, 20, 0.6));
}

.pulse-1 {
  animation: pulsePath1 7s linear infinite;
}
.pulse-2 {
  animation: pulsePath2 7s linear infinite 2.3s;
}
.pulse-3 {
  animation: pulsePath3 7s linear infinite 4.6s;
}

@keyframes pulsePath1 {
  0%   { transform: translate(100px, 100px); opacity: 0; }
  5%   { opacity: 1; }
  25%  { transform: translate(300px, 100px); }
  50%  { transform: translate(300px, 250px); }
  75%  { transform: translate(500px, 250px); }
  95%  { opacity: 1; }
  100% { transform: translate(500px, 250px); opacity: 0; }
}
@keyframes pulsePath2 {
  0%   { transform: translate(500px, 100px); opacity: 0; }
  5%   { opacity: 1; }
  33%  { transform: translate(700px, 100px); }
  66%  { transform: translate(700px, 350px); }
  95%  { opacity: 1; }
  100% { transform: translate(600px, 350px); opacity: 0; }
}
@keyframes pulsePath3 {
  0%   { transform: translate(200px, 350px); opacity: 0; }
  5%   { opacity: 1; }
  33%  { transform: translate(400px, 350px); }
  66%  { transform: translate(400px, 500px); }
  95%  { opacity: 1; }
  100% { transform: translate(600px, 500px); opacity: 0; }
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  margin-bottom: var(--s-7);
}

.hero-issue {
  font-family: var(--font-mono);
  font-size: var(--fs-50);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--ink-mute);
}

.hero-rule {
  flex: 1;
  max-width: 220px;
  height: 1px;
  background: var(--rule);
}

.hero-label {
  font-family: var(--font-sans);
  font-size: var(--fs-50);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: var(--s-5);
  position: relative;
  padding-left: var(--s-5);
}

.hero-label::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 14px; height: 1px;
  background: var(--accent);
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.75rem, 8.6vw, var(--fs-1000));
  line-height: 0.96;
  letter-spacing: -0.028em;
  margin-bottom: var(--s-7);
  font-variation-settings: "opsz" 144;
  font-feature-settings: "kern", "liga", "dlig", "ss01";
}

.hero-line {
  display: block;
}

.hero-line em {
  font-style: italic;
  color: var(--accent);
  font-variation-settings: "opsz" 144;
}

.hero-sub {
  font-size: var(--fs-300);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
  margin-bottom: var(--s-7);
}

.hero-ctas {
  display: flex;
  gap: var(--s-4);
  flex-wrap: wrap;
  margin-bottom: var(--s-9);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-7);
  max-width: 720px;
  border-top: 1px solid var(--rule);
  padding-top: var(--s-6);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, var(--fs-600));
  font-weight: 400;
  font-style: italic;
  line-height: 1;
  color: var(--ink);
  letter-spacing: var(--tracking-tight);
  font-variation-settings: "opsz" 60;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: var(--fs-75);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ============================================
   SOCIAL PROOF BAR
   ============================================ */
.social-proof {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--paper-soft);
}

.social-proof-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--s-7) var(--content-pad);
  display: flex;
  align-items: center;
  gap: var(--s-7);
  flex-wrap: wrap;
}

.proof-label {
  font-size: var(--fs-50);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
  flex-shrink: 0;
  max-width: 220px;
}

.integration-strip {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  flex-wrap: wrap;
  flex: 1;
}

.integration-logo {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-300);
  color: var(--ink-soft);
  font-variation-settings: "opsz" 24;
}

.integration-dot {
  width: 4px;
  height: 4px;
  background: var(--rule);
  border-radius: 50%;
}

/* ============================================
   PROBLEMS
   ============================================ */
.problems-intro {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-400);
  line-height: var(--lh-snug);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
  font-variation-settings: "opsz" 36;
}

.data-banner {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: var(--s-6);
  align-items: start;
  padding: var(--s-7) 0;
  margin-bottom: var(--s-9);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.data-stat {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.data-number {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, var(--fs-800));
  font-weight: 400;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.03em;
  font-variation-settings: "opsz" 96;
}

.data-desc {
  font-size: var(--fs-100);
  line-height: var(--lh-snug);
  color: var(--ink-soft);
  max-width: 28ch;
}

.data-source {
  font-family: var(--font-mono);
  font-size: var(--fs-50);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: var(--s-2);
}

.data-divider {
  width: 1px;
  background: var(--rule);
  align-self: stretch;
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.problem-card {
  background: var(--paper);
  padding: var(--s-8) var(--s-7);
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: var(--s-6);
  position: relative;
  transition: background var(--t-normal) var(--ease-out);
}

.problem-card:hover {
  background: var(--paper-soft);
}

.problem-card-wide {
  grid-column: 1 / -1;
}

.problem-number {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(3.5rem, 6vw, 5.25rem);
  line-height: 0.85;
  font-weight: 300;
  color: var(--accent);
  letter-spacing: -0.04em;
  font-variation-settings: "opsz" 144;
  position: relative;
  padding-top: 4px;
}

.problem-number::after {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: var(--accent);
  margin-top: var(--s-3);
}

.problem-body h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 2.4vw, var(--fs-500));
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  margin-bottom: var(--s-4);
  font-variation-settings: "opsz" 36;
}

.problem-body > p {
  font-size: var(--fs-100);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
  margin-bottom: var(--s-6);
}

.problem-specs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  border-top: 1px solid var(--rule);
  padding-top: var(--s-5);
  margin: 0;
}

.spec-item {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: var(--s-3);
  font-size: var(--fs-75);
  line-height: var(--lh-snug);
  color: var(--ink-soft);
}

.spec-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  font-feature-settings: "tnum";
  letter-spacing: 0;
  padding-top: 2px;
}

/* ============================================
   CAPABILITIES
   ============================================ */
.capability-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: var(--s-7);
  position: relative;
  transition: border-color var(--t-normal) var(--ease-out),
              background var(--t-normal) var(--ease-out);
}
.capability-card:hover {
  border-color: var(--ink);
}

.capability-featured {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--s-8);
  padding: var(--s-9) var(--s-8);
  background: var(--paper-soft);
  border-color: var(--ink);
  margin-bottom: var(--s-6);
}

.cap-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--s-5);
  grid-column: 1 / -1;
}

.capability-featured .cap-header {
  grid-column: 1 / -1;
  margin-bottom: var(--s-4);
}

.cap-number {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(2.5rem, 4vw, var(--fs-700));
  line-height: 1;
  color: var(--accent);
  font-weight: 300;
  letter-spacing: -0.04em;
  font-variation-settings: "opsz" 96;
}

.cap-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-widest);
  color: var(--paper);
  background: var(--ink);
  padding: 4px 10px;
}

.capability-card h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.625rem, 2.6vw, var(--fs-600));
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  margin-bottom: var(--s-4);
  font-variation-settings: "opsz" 48;
}

.capability-featured h3 {
  grid-column: 1;
}

.capability-card > p {
  font-size: var(--fs-100);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
  margin-bottom: var(--s-5);
}

.capability-featured > p {
  grid-column: 1;
  margin-bottom: var(--s-5);
}

.capability-featured .problem-specs {
  grid-column: 1;
}

.cap-visual {
  grid-column: 2;
  grid-row: 2 / span 3;
  align-self: stretch;
  display: flex;
  align-items: center;
}

.terminal-mock {
  width: 100%;
  background: var(--term-bg);
  color: var(--term-ink);
  font-family: var(--font-mono);
  font-size: var(--fs-75);
  line-height: 1.7;
  border: 1px solid #2a261d;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid #2a261d;
}
.terminal-bar > span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #3a342a;
}
.terminal-bar > span:nth-child(1) { background: #c25c3c; }
.terminal-bar > span:nth-child(2) { background: #c2a14a; }
.terminal-bar > span:nth-child(3) { background: #6a8a4f; }
.terminal-title {
  width: auto !important; height: auto !important;
  border-radius: 0 !important;
  background: transparent !important;
  margin-left: var(--s-3);
  font-size: 11px;
  color: #8a8273 !important;
  letter-spacing: var(--tracking-snug);
}

.terminal-line {
  padding: 4px 16px;
}
.terminal-line:first-of-type { padding-top: 14px; }
.terminal-line:last-of-type { padding-bottom: 16px; }

.t-dim    { color: #6a6353; }
.t-accent { color: #e8a370; }
.t-green  { color: #98b87a; }

.t-cursor {
  display: inline-block;
  width: 7px;
  height: 1em;
  background: var(--term-ink);
  vertical-align: -2px;
  margin-left: 4px;
  animation: cursorBlink 1.05s steps(2, jump-none) infinite;
}

@keyframes cursorBlink {
  50% { opacity: 0; }
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-5);
}

/* ============================================
   ARCHITECTURE
   ============================================ */
.architecture .section-head {
  position: relative;
  max-width: 100%;
}

.arch-number {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(4rem, 10vw, 9rem);
  line-height: 0.85;
  color: var(--accent);
  font-weight: 300;
  letter-spacing: -0.04em;
  font-variation-settings: "opsz" 144;
  pointer-events: none;
}

.arch-description {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-400);
  line-height: var(--lh-snug);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
  margin-top: var(--s-5);
  font-variation-settings: "opsz" 36;
}

.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.arch-item {
  background: var(--paper);
  padding: var(--s-7) var(--s-6);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  transition: background var(--t-normal) var(--ease-out);
}
.arch-item:hover {
  background: var(--paper-soft);
}

.arch-icon {
  color: var(--accent);
  width: 28px; height: 28px;
}

.arch-item-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: var(--fs-400);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  font-variation-settings: "opsz" 24;
}

.arch-item-desc {
  font-size: var(--fs-75);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
}

/* ============================================
   PERSONAS
   ============================================ */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.persona-card {
  background: var(--paper);
  padding: var(--s-8) var(--s-7);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  transition: background var(--t-normal) var(--ease-out);
}
.persona-card:hover {
  background: var(--paper-soft);
}

.persona-icon {
  color: var(--accent);
  width: 32px;
  height: 32px;
  margin-bottom: var(--s-3);
}

.persona-role {
  font-family: var(--font-mono);
  font-size: var(--fs-50);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-mute);
}

.persona-card h3 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.5rem, 2.4vw, var(--fs-500));
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  font-variation-settings: "opsz" 36;
}

.persona-card > p {
  font-size: var(--fs-100);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
}

.persona-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-top: var(--s-3);
  padding-top: var(--s-4);
  border-top: 1px solid var(--rule);
}

.persona-features span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 4px 9px;
  border: 1px solid var(--rule);
}

/* ============================================
   DIFFERENTIATOR
   ============================================ */
.diff-intro {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-400);
  line-height: var(--lh-snug);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
  margin-top: var(--s-5);
  font-variation-settings: "opsz" 36;
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-bottom: var(--s-9);
}

.diff-card {
  background: var(--paper);
  padding: var(--s-7);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  transition: background var(--t-normal) var(--ease-out);
}
.diff-card:hover {
  background: var(--paper-soft);
}

.diff-card-featured {
  grid-column: 1 / -1;
  background: var(--ink);
  color: var(--paper);
  padding: var(--s-8) var(--s-7);
}
.diff-card-featured:hover {
  background: var(--ink-soft);
}

.diff-icon {
  color: var(--accent);
}

.diff-card h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: var(--fs-500);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  font-variation-settings: "opsz" 36;
}

.diff-card-featured h3 {
  font-size: clamp(1.875rem, 3vw, var(--fs-600));
  font-style: italic;
}

.diff-card p {
  font-size: var(--fs-100);
  line-height: var(--lh-loose);
  color: var(--ink-soft);
  max-width: var(--measure-narrow);
}
.diff-card-featured p {
  color: rgba(244, 240, 230, 0.78);
  font-size: var(--fs-200);
  max-width: var(--measure);
}

/* COMPARISON TABLE */
.comparison-table {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.comp-header,
.comp-row {
  display: grid;
  grid-template-columns: 1.2fr 1.6fr 1.6fr;
  border-bottom: 1px solid var(--rule);
}
.comp-row:last-child { border-bottom: 0; }

.comp-header {
  border-bottom: 1px solid var(--ink);
}

.comp-cell {
  padding: var(--s-5) var(--s-5);
  font-size: var(--fs-100);
  line-height: var(--lh-snug);
}

.comp-header .comp-cell {
  font-family: var(--font-sans);
  font-size: var(--fs-50);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-mute);
}

.comp-feature {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--ink);
  font-size: var(--fs-200);
  font-variation-settings: "opsz" 18;
}

.comp-nico {
  color: var(--ink);
  font-weight: 500;
  border-left: 1px solid var(--rule);
}
.comp-header .comp-nico {
  color: var(--accent);
}

.comp-others {
  color: var(--ink-mute);
  border-left: 1px solid var(--rule);
}

/* ============================================
   ABOUT
   ============================================ */
.about .section-head {
  position: relative;
  max-width: 100%;
}

.about-number {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(4rem, 10vw, 9rem);
  line-height: 0.85;
  color: var(--accent);
  font-weight: 300;
  letter-spacing: -0.04em;
  font-variation-settings: "opsz" 144;
}

.about-desc {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--fs-400);
  line-height: var(--lh-snug);
  color: var(--ink-soft);
  max-width: var(--measure);
  margin-top: var(--s-5);
  font-variation-settings: "opsz" 36;
}

/* ============================================
   FINAL CTA
   ============================================ */
.final-cta {
  text-align: left;
}

.final-cta-inner {
  max-width: 880px;
}

.final-cta .section-label { margin-bottom: var(--s-7); }

.final-cta-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.5rem, 6vw, var(--fs-900));
  line-height: 0.98;
  letter-spacing: -0.028em;
  color: var(--ink);
  margin-bottom: var(--s-7);
  font-variation-settings: "opsz" 144;
}

.final-cta-title em {
  font-style: italic;
  color: var(--accent);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  border-top: 1px solid var(--rule);
  background: var(--paper-soft);
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--s-9) var(--content-pad) var(--s-7);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1.4fr;
  gap: var(--s-7);
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: var(--fs-50);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: var(--s-4);
}

.footer-col a {
  display: block;
  font-size: var(--fs-100);
  color: var(--ink-soft);
  padding: 4px 0;
  position: relative;
  width: max-content;
  transition: color var(--t-fast) var(--ease-out);
}
.footer-col a:hover {
  color: var(--accent);
}

.footer-brand {
  font-size: var(--fs-300);
  font-weight: 600;
  letter-spacing: var(--tracking-snug);
}
.footer-brand p {
  margin-top: var(--s-3);
  font-size: var(--fs-75);
  font-weight: 400;
  color: var(--ink-mute);
  letter-spacing: 0;
}

/* ============================================
   REVEAL ANIMATIONS (IntersectionObserver)
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--t-slow) var(--ease-out),
              transform var(--t-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.section-head {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--t-slow) var(--ease-out),
              transform var(--t-slow) var(--ease-out);
}
.section-head.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero loads in immediately */
.hero-inner > * {
  opacity: 0;
  transform: translateY(20px);
  animation: heroIn var(--t-slow) var(--ease-out) forwards;
}
.hero-inner > *:nth-child(1) { animation-delay: 100ms; }
.hero-inner > *:nth-child(2) { animation-delay: 220ms; }
.hero-inner > *:nth-child(3) { animation-delay: 340ms; }
.hero-inner > *:nth-child(4) { animation-delay: 460ms; }
.hero-inner > *:nth-child(5) { animation-delay: 580ms; }
.hero-inner > *:nth-child(6) { animation-delay: 700ms; }

@keyframes heroIn {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .nav-links { gap: var(--s-5); }
  .nav-links a .nav-num { display: none; }

  .capabilities-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .arch-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: 1fr 1fr; }

  .capability-featured {
    grid-template-columns: 1fr;
    padding: var(--s-7);
  }
  .cap-visual {
    grid-column: 1;
    grid-row: auto;
    margin-top: var(--s-4);
  }
}

@media (max-width: 768px) {
  :root {
    --content-pad: 20px;
  }

  .nav { padding: var(--s-3) var(--content-pad); }
  .nav-links { display: none; }
  .nav-cta .btn { padding: 9px 14px; font-size: 12px; }

  .section { padding: var(--s-10) var(--content-pad); }
  .section-head { margin-bottom: var(--s-7); }

  .hero {
    padding-top: clamp(120px, 18vh, 160px);
    padding-bottom: var(--s-9);
    min-height: auto;
  }
  .hero-schematic {
    opacity: 0.32;
    mask-image: radial-gradient(ellipse at 70% 30%, #000 25%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at 70% 30%, #000 25%, transparent 70%);
  }
  .hero-meta { margin-bottom: var(--s-5); }
  .hero-rule { max-width: 80px; }

  .hero-title { line-height: 0.98; margin-bottom: var(--s-5); }
  .hero-sub { font-size: var(--fs-200); margin-bottom: var(--s-6); }
  .hero-ctas { margin-bottom: var(--s-7); }
  .hero-ctas .btn { flex: 1; min-width: 0; }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--s-4);
    padding-top: var(--s-5);
  }
  .stat {
    flex-direction: row;
    align-items: baseline;
    gap: var(--s-4);
    padding-bottom: var(--s-4);
    border-bottom: 1px solid var(--rule);
  }
  .stat:last-child { border-bottom: none; padding-bottom: 0; }
  .stat-number { font-size: var(--fs-500); }

  .social-proof-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s-4);
    padding: var(--s-5) var(--content-pad);
  }
  .integration-strip { gap: var(--s-3); }
  .integration-logo { font-size: var(--fs-200); }

  .data-banner {
    grid-template-columns: 1fr;
    gap: var(--s-6);
    padding: var(--s-6) 0;
    margin-bottom: var(--s-7);
  }
  .data-divider { display: none; }
  .data-stat {
    padding-bottom: var(--s-5);
    border-bottom: 1px solid var(--rule);
  }
  .data-stat:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .problems-grid,
  .persona-grid,
  .diff-grid,
  .arch-grid,
  .capabilities-grid {
    grid-template-columns: 1fr;
  }

  .problem-card {
    grid-template-columns: 64px 1fr;
    gap: var(--s-4);
    padding: var(--s-6) var(--s-5);
  }
  .problem-number { font-size: 3rem; }
  .problem-card-wide { grid-column: 1; }

  .capability-card { padding: var(--s-6) var(--s-5); }
  .persona-card { padding: var(--s-6) var(--s-5); }
  .arch-item { padding: var(--s-6) var(--s-5); }
  .diff-card { padding: var(--s-6) var(--s-5); }

  .arch-number,
  .about-number {
    position: static;
    margin-top: var(--s-4);
    font-size: 5rem;
  }

  .comp-header,
  .comp-row {
    grid-template-columns: 1fr;
  }
  .comp-cell { padding: var(--s-3) var(--s-4); border-left: none !important; }
  .comp-header { display: none; }
  .comp-row {
    padding: var(--s-3) 0;
    border-bottom: 1px solid var(--rule);
  }
  .comp-feature {
    font-size: var(--fs-100);
    color: var(--ink-mute);
    padding-bottom: 0;
  }
  .comp-nico::before {
    content: "Nico — ";
    color: var(--accent);
    font-weight: 500;
  }
  .comp-others::before {
    content: "SaaS — ";
    color: var(--ink-faint);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-6);
    padding: var(--s-7) var(--content-pad);
  }
  .footer-brand { grid-column: 1 / -1; }

  .final-cta-title { font-size: clamp(2rem, 9vw, 3rem); }
}

@media (max-width: 420px) {
  .hero-title { font-size: clamp(2.5rem, 13vw, 3.5rem); }
  .problem-card { grid-template-columns: 1fr; }
  .problem-number::after { display: none; }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }
  .reveal,
  .section-head,
  .hero-inner > * {
    opacity: 1 !important;
    transform: none !important;
  }
  .pulse-dot,
  .schematic-nodes circle.node-accent,
  .t-cursor {
    animation: none !important;
  }
}

/* ============================================
   COMPLIANCE FRAMING ADDITIONS
   ============================================ */

.final-cta-note {
  font-family: var(--font-sans);
  font-size: var(--fs-75);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: var(--s-6);
}