/* Technology For Humanity — landing page
 * Three services: personalized app building, niche-market apps, IWMS tools.
 * Layout pattern adapted from elastic.co: utility bar, primary nav with
 * CTAs, announcement chip, big bold hero, colored 3-card services row,
 * IWMS deep-dive with pillars, About. Palette keeps the calm sage/cream
 * brand identity rather than elastic's blue.
 *
 * Mobile-first, system fonts, dark-mode via prefers-color-scheme. No JS.
 */

:root {
  --bg: #fafaf7;
  --bg-elevated: #ffffff;
  --ink: #1a2420;
  --ink-soft: #5a6862;
  --ink-muted: #8a978f;
  --border: #ece9df;
  --border-strong: #d8d5c8;

  --accent: #4f8a75;
  --accent-hover: #3f7163;
  --accent-soft: #e8f0ec;

  /* Per-service accent colors */
  --service-01-accent: #b8842f;   /* warm gold — Personalized */
  --service-01-soft: #f7ecd6;
  --service-02-accent: #4f8a75;   /* sage — Niche markets (Sagely) */
  --service-02-soft: #e8f0ec;
  --service-03-accent: #2d6b6b;   /* deep teal — IWMS */
  --service-03-soft: #d8e6e3;

  /* Service card 01 — cream (Personalized) */
  --card-cream-bg: #fbf3e3;
  --card-cream-ink: #4a3a1f;
  --card-cream-soft: #7a6b4f;
  --card-cream-num: #d8c79b;

  /* Service card 02 — mint (Niche / Sagely) */
  --card-mint-bg: #c8e6d4;
  --card-mint-ink: #1a3a2a;
  --card-mint-soft: #3d6b54;
  --card-mint-num: #9cc6ad;

  /* Service card 03 — deep teal (IWMS) */
  --card-deep-bg: #1c3a32;
  --card-deep-ink: #f0f5f1;
  --card-deep-soft: #a4c5b7;
  --card-deep-accent: #7ac0a8;
  --card-deep-num: #3d6b5c;

  --chip-bg: #ffffff;
  --chip-border: #ece9df;
  --chip-tag: #c14a6e;

  --container: 1200px;
  --container-narrow: 760px;
  --space-x: clamp(1.25rem, 4vw, 2.5rem);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(26, 36, 32, 0.04);
  --shadow-card: 0 1px 3px rgba(26, 36, 32, 0.06), 0 4px 12px rgba(26, 36, 32, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15201c;
    --bg-elevated: #1e2a26;
    --ink: #e9efea;
    --ink-soft: #a4b1ac;
    --ink-muted: #7a8780;
    --border: #2a3530;
    --border-strong: #3a4540;

    --accent: #7ac0a8;
    --accent-hover: #8fd2bb;
    --accent-soft: #243029;

    --service-01-accent: #d4a85c;
    --service-01-soft: #3a3120;
    --service-02-accent: #7ac0a8;
    --service-02-soft: #243029;
    --service-03-accent: #6aa195;
    --service-03-soft: #1f3a36;

    --card-cream-bg: #3a3120;
    --card-cream-ink: #f3e8cf;
    --card-cream-soft: #c9b88f;
    --card-cream-num: #6b5a3a;

    --card-mint-bg: #2d513e;
    --card-mint-ink: #dfeee4;
    --card-mint-soft: #a4c5b7;
    --card-mint-num: #4e7a63;

    --card-deep-bg: #0d2622;
    --card-deep-ink: #f0f5f1;
    --card-deep-soft: #a4c5b7;
    --card-deep-accent: #7ac0a8;
    --card-deep-num: #2a4d44;

    --chip-bg: #1e2a26;
    --chip-border: #2a3530;
    --chip-tag: #e67889;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.2);
  }
}

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

html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui,
    "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

strong { font-weight: 600; color: var(--ink); }

/* ─── site header ─────────────────────────────────────────── */
.site-header { background: var(--bg); }

.utility-bar {
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.utility-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.55rem var(--space-x);
  display: flex;
  justify-content: flex-end;
  gap: 1.5rem;
}

.utility-inner a { color: var(--ink-soft); }
.utility-inner a:hover { color: var(--ink); }

.nav-bar { border-bottom: 1px solid var(--border); }

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1rem var(--space-x);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  flex-shrink: 0;
}

.brand-name {
  font-weight: 600;
  letter-spacing: 0.005em;
  font-size: 1.05rem;
  color: var(--ink);
}

.nav-primary {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-left: 1rem;
  flex: 1;
}

.nav-primary a {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.25rem 0;
}
.nav-primary a:hover { color: var(--accent); }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

@media (max-width: 800px) {
  .nav-primary { display: none; }
  .nav-inner { gap: 1rem; }
  .nav-cta .btn-outline { display: none; }
}

/* ─── buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
  border: 1.5px solid transparent;
  font-family: inherit;
  white-space: nowrap;
}

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

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

.btn-lg {
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
}

/* ─── main ────────────────────────────────────────────────── */
main { flex: 1; width: 100%; }

/* ─── hero ────────────────────────────────────────────────── */
.hero {
  text-align: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(2.5rem, 8vw, 5rem) var(--space-x) clamp(3rem, 8vw, 5.5rem);
  position: relative;
  isolation: isolate;
}

/* Soft sage glow behind the hero headline */
.hero::before {
  content: "";
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: min(70vw, 600px);
  height: min(70vw, 600px);
  background: radial-gradient(
    circle,
    var(--accent-soft) 0%,
    transparent 65%
  );
  opacity: 0.7;
  z-index: -1;
  pointer-events: none;
}

.announce-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  border-radius: var(--radius-pill);
  padding: 0.45rem 1rem 0.45rem 0.5rem;
  font-size: 0.9rem;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  margin-bottom: clamp(1.75rem, 5vw, 2.5rem);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.announce-chip:hover {
  color: var(--ink);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card);
}

.announce-tag {
  display: inline-block;
  background: var(--chip-tag);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-pill);
  text-transform: lowercase;
}

.announce-arrow { color: var(--ink-soft); font-weight: 400; }

.hero-headline {
  font-size: clamp(2.1rem, 6.5vw, 4.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  color: var(--ink);
  max-width: 22ch;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 600px) {
  .hero-headline br { display: none; }
  .hero-headline { max-width: 20ch; }
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 auto clamp(2rem, 5vw, 2.5rem);
  line-height: 1.6;
}

.hero-sub-tail {
  margin-top: -1rem;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ─── section headers (shared) ────────────────────────────── */
.section-header {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto clamp(2rem, 5vw, 2.75rem);
}

.section-header-iwms,
.section-header-about {
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.75rem;
}

.section-headline {
  font-size: clamp(1.65rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--ink);
  max-width: 24ch;
  margin: 0 auto 1rem;
}

.section-header-iwms .section-headline { max-width: 26ch; }

.section-lede {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 auto;
  line-height: 1.6;
}

/* ─── services (tabs + swappable panel) ───────────────────── */
.services {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4rem) var(--space-x);
}

.service-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(0.75rem, 2vw, 1.25rem);
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

@media (max-width: 900px) {
  .service-tabs { grid-template-columns: 1fr; }
}

.service-tab {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.service-tab:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.service-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.service-tab.is-active {
  background: var(--bg-elevated);
  border-color: var(--accent);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

/* Active tab shows a downward chevron pointing at the panel below */
.service-tab.is-active::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 16px;
  height: 16px;
  background: var(--bg-elevated);
  border-right: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
}

@media (max-width: 900px) {
  .service-tab.is-active::after { display: none; }
}

.service-tab-eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.service-tab-icon {
  width: 32px;
  height: 32px;
  color: var(--ink-muted);
  margin-bottom: 0.5rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.service-tab:hover .service-tab-icon {
  transform: scale(1.05);
}

/* Per-service tab colors (icon, eyebrow, border, chevron when active) */
.service-tab-01:hover .service-tab-icon,
.service-tab-01.is-active .service-tab-icon { color: var(--service-01-accent); }
.service-tab-02:hover .service-tab-icon,
.service-tab-02.is-active .service-tab-icon { color: var(--service-02-accent); }
.service-tab-03:hover .service-tab-icon,
.service-tab-03.is-active .service-tab-icon { color: var(--service-03-accent); }

.service-tab-01.is-active .service-tab-eyebrow { color: var(--service-01-accent); }
.service-tab-02.is-active .service-tab-eyebrow { color: var(--service-02-accent); }
.service-tab-03.is-active .service-tab-eyebrow { color: var(--service-03-accent); }

.service-tab-01.is-active { border-color: var(--service-01-accent); }
.service-tab-02.is-active { border-color: var(--service-02-accent); }
.service-tab-03.is-active { border-color: var(--service-03-accent); }

.service-tab-01.is-active::after {
  border-right-color: var(--service-01-accent);
  border-bottom-color: var(--service-01-accent);
}
.service-tab-02.is-active::after {
  border-right-color: var(--service-02-accent);
  border-bottom-color: var(--service-02-accent);
}
.service-tab-03.is-active::after {
  border-right-color: var(--service-03-accent);
  border-bottom-color: var(--service-03-accent);
}

.service-tab-headline {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--ink);
}

.service-tab-status {
  display: inline-block;
  align-self: flex-start;
  margin-top: 0.5rem;
  padding: 0.2rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background: var(--service-03-accent);
  border-radius: var(--radius-pill);
}

/* Panels */
.service-panels {
  background: var(--service-01-soft);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.75rem) clamp(1.5rem, 3vw, 2.5rem);
  transition: background 0.3s ease;
}

.service-panels[data-active="02"] { background: var(--service-02-soft); }
.service-panels[data-active="03"] { background: var(--service-03-soft); }

@media (prefers-color-scheme: dark) {
  .service-panels,
  .service-panels[data-active="02"],
  .service-panels[data-active="03"] {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
  }
}

.service-panel {
  display: none;
}

.service-panel.is-active {
  display: block;
  animation: panelFadeIn 0.25s ease;
}

@keyframes panelFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-lede {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 auto clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.6;
  text-align: center;
}

.panel-lede-tail {
  margin-top: -0.75rem;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2.5vw, 1.25rem);
  margin-bottom: 2rem;
}

@media (max-width: 800px) {
  .pillars { grid-template-columns: 1fr; }
}

.pillar {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: clamp(1.25rem, 2.5vw, 1.5rem);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pillar:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.pillar-icon {
  width: 28px;
  height: 28px;
  display: block;
  margin-bottom: 0.7rem;
  color: var(--accent);
}

#service-panel-01 .pillar-icon { color: var(--service-01-accent); }
#service-panel-02 .pillar-icon { color: var(--service-02-accent); }
#service-panel-03 .pillar-icon { color: var(--service-03-accent); }

.pillar h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.pillar p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

/* Mascot inside the niche-market panel */
.panel-mascot {
  display: block;
  width: clamp(90px, 14vw, 140px);
  height: auto;
  margin: 0 auto 1rem;
}

.service-cta {
  text-align: center;
  margin-top: 1rem;
}

.service-outro {
  text-align: center;
  font-size: 1rem;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 auto;
  line-height: 1.55;
}

.service-outro + .service-cta {
  margin-top: 1.25rem;
}

/* ─── About ───────────────────────────────────────────────── */
.about {
  border-top: 1px solid var(--border);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(2.5rem, 6vw, 4rem) var(--space-x) clamp(3rem, 6vw, 4.5rem);
  text-align: center;
}

.about-illustration {
  display: block;
  width: clamp(110px, 14vw, 150px);
  height: auto;
  margin: 0 auto clamp(1.25rem, 3vw, 1.75rem);
}

.about-links {
  margin-top: 1.5rem;
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.5rem) var(--space-x);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2rem;
  justify-content: space-between;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.footer-links a { color: var(--ink-soft); }
.footer-links a:hover { color: var(--ink); }

.footer-meta {
  font-size: 0.85rem;
  color: var(--ink-muted);
}

@media (max-width: 600px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
}