/* ============================================================
   Wrenforge — portfolio site
   Theme: light & professional · deep green accent
   Dark mode: system preference + manual toggle (localStorage).
   ============================================================ */

/* ---------- 1. Design tokens (light) ---------- */
:root {
  color-scheme: light;
  /* color */
  --bg-0: #f7f9f7;
  --bg-1: #f0f4f1;
  --surface: #ffffff;
  --surface-2: #f6f8f6;
  --border: rgba(21, 34, 27, 0.1);
  --border-strong: rgba(21, 34, 27, 0.18);
  --text-hi: #17211b;
  --text: #2c3931;
  --text-mid: #5c6b62;
  --text-low: #8b988f;
  --green: #1a7a4b;
  --green-deep: #0f5c36;
  --green-soft: rgba(26, 122, 75, 0.08);
  --green-line: rgba(26, 122, 75, 0.25);
  --amber: #a9761f;

  /* chrome */
  --header-bg: rgba(247, 249, 247, 0.86);
  --header-bg-solid: rgba(247, 249, 247, 0.96);
  --nav-bg: rgba(247, 249, 247, 0.98);
  --hover-bg: rgba(21, 34, 27, 0.05);
  --grid-line: rgba(21, 34, 27, 0.04);
  --tint-a: rgba(26, 122, 75, 0.07);
  --tint-b: rgba(26, 122, 75, 0.05);

  /* typography */
  --font-display: "Lora", "Georgia", "Times New Roman", serif;
  --font-body: "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Code", Consolas, monospace;

  /* spacing scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* radius */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
  --r-full: 999px;

  /* elevation — soft, neutral, no glow */
  --shadow-1: 0 1px 2px rgba(21, 34, 27, 0.06);
  --shadow-2: 0 10px 30px rgba(21, 34, 27, 0.08);
  --shadow-3: 0 18px 44px rgba(21, 34, 27, 0.12);

  /* motion */
  --dur: 0.25s;
  --dur-slow: 0.6s;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 72px;
}

/* ---------- 1b. Design tokens (dark) ---------- */
[data-theme="dark"] {
  color-scheme: dark;
  --bg-0: #0f1512;
  --bg-1: #141b17;
  --surface: #191f1c;
  --surface-2: #202722;
  --border: rgba(235, 245, 240, 0.09);
  --border-strong: rgba(235, 245, 240, 0.16);
  --text-hi: #edf3ef;
  --text: #c2ccc5;
  --text-mid: #8a968e;
  --text-low: #5e6a62;
  --green: #2f9e6e;
  --green-deep: #55d29a;
  --green-soft: rgba(64, 208, 143, 0.1);
  --green-line: rgba(64, 208, 143, 0.28);
  --amber: #d9a441;
  --header-bg: rgba(15, 21, 18, 0.86);
  --header-bg-solid: rgba(15, 21, 18, 0.96);
  --nav-bg: rgba(15, 21, 18, 0.98);
  --hover-bg: rgba(235, 245, 240, 0.06);
  --grid-line: rgba(235, 245, 240, 0.05);
  --tint-a: rgba(64, 208, 143, 0.12);
  --tint-b: rgba(64, 208, 143, 0.08);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-2: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-3: 0 18px 44px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg-0: #0f1512;
    --bg-1: #141b17;
    --surface: #191f1c;
    --surface-2: #202722;
    --border: rgba(235, 245, 240, 0.09);
    --border-strong: rgba(235, 245, 240, 0.16);
    --text-hi: #edf3ef;
    --text: #c2ccc5;
    --text-mid: #8a968e;
    --text-low: #5e6a62;
    --green: #2f9e6e;
    --green-deep: #55d29a;
    --green-soft: rgba(64, 208, 143, 0.1);
    --green-line: rgba(64, 208, 143, 0.28);
    --amber: #d9a441;
    --header-bg: rgba(15, 21, 18, 0.86);
    --header-bg-solid: rgba(15, 21, 18, 0.96);
    --nav-bg: rgba(15, 21, 18, 0.98);
    --hover-bg: rgba(235, 245, 240, 0.06);
    --grid-line: rgba(235, 245, 240, 0.05);
    --tint-a: rgba(64, 208, 143, 0.12);
    --tint-b: rgba(64, 208, 143, 0.08);
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-2: 0 10px 30px rgba(0, 0, 0, 0.4);
    --shadow-3: 0 18px 44px rgba(0, 0, 0, 0.5);
  }
}

/* ---------- 2. Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(26, 122, 75, 0.18);
  color: var(--text-hi);
}

.container {
  width: min(1120px, 100% - var(--space-8));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-20);
}

section[id],
[data-anchor] {
  scroll-margin-top: calc(var(--header-h) + var(--space-4));
}

/* ---------- 3. Skip link ---------- */
.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  color: var(--text-hi);
  font-weight: 600;
  font-size: 0.875rem;
  transform: translateY(-200%);
  transition: transform var(--dur) ease;
}

.skip-link:focus {
  transform: none;
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--r-md);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.2;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    background-color var(--dur) ease, border-color var(--dur) ease;
  will-change: transform;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--dur) var(--ease);
}

.btn:hover svg {
  transform: translateX(3px);
}

.btn-primary {
  color: #ffffff;
  background: var(--green);
  box-shadow: 0 4px 14px rgba(26, 122, 75, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--green-deep);
  box-shadow: 0 8px 22px rgba(26, 122, 75, 0.34);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-ghost {
  color: var(--text-hi);
  background: var(--surface);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--green);
  color: var(--green-deep);
  box-shadow: var(--shadow-1);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: 1rem;
}

/* ---------- 4b. Contact banner ---------- */
.contact-banner {
  background: var(--green-soft);
  border-bottom: 1px solid var(--green-line);
}

.contact-banner .banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
  padding-block: var(--space-5) var(--space-5);
}

.banner-text {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 1rem;
  color: var(--text-hi);
  font-weight: 600;
}

.banner-text svg {
  width: 20px;
  height: 20px;
  flex: none;
  color: var(--green-deep);
}

.contact-banner .btn {
  box-shadow: none;
}

/* ---------- 5. Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--r-full);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-mid);
}

.tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.tag-web,
.tag-android,
.tag-windows {
  color: var(--text-mid);
  border-color: var(--border);
  background: var(--surface-2);
}

/* ---------- 6. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) ease, background-color var(--dur) ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: var(--header-bg-solid);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--text-hi);
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 28px;
  height: 28px;
  color: var(--green);
}

.brand-accent {
  color: var(--green);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-link {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--r-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-mid);
  transition: color var(--dur) ease, background-color var(--dur) ease;
}

.nav-link:hover {
  color: var(--text-hi);
  background: var(--hover-bg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: var(--space-2);
  border-radius: var(--r-sm);
  border: 1px solid var(--border-strong);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--text-hi);
  transition: transform var(--dur) var(--ease), opacity var(--dur) ease;
}

.site-header.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header.nav-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-strong);
  color: var(--text-mid);
  transition: color var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.theme-toggle:hover {
  color: var(--text-hi);
  border-color: var(--green-line);
  background: var(--green-soft);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.icon-sun {
  display: block;
}

.icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: none;
}

[data-theme="dark"] .icon-moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun {
    display: none;
  }

  :root:not([data-theme="light"]) .icon-moon {
    display: block;
  }
}

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  min-height: min(88vh, 720px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-block: var(--space-20) var(--space-16);
  background:
    radial-gradient(ellipse 70% 55% at 85% -10%, var(--tint-a), transparent 70%),
    radial-gradient(ellipse 60% 50% at -10% 90%, var(--tint-b), transparent 70%),
    var(--bg-0);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, #000 30%, transparent 75%);
}

.hero-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 55% at 50% -10%, rgba(26, 122, 75, 0.06), transparent 70%);
}

.blob {
  display: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-copy {
  max-width: 700px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-deep);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--green-line);
  border-radius: var(--r-full);
  background: var(--green-soft);
}

.hero-heading {
  margin-top: var(--space-6);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.3rem, 5.6vw, 3.7rem);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--text-hi);
}

.grad-text {
  color: var(--green-deep);
}

.hero-sub {
  margin-top: var(--space-5);
  max-width: 540px;
  font-size: 1.125rem;
  color: var(--text-mid);
}

.hero-actions {
  margin-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- 8. Stats strip ---------- */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding-block: var(--space-10);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.stat {
  text-align: center;
  padding: var(--space-4) var(--space-2);
}

.stat-value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  letter-spacing: -0.02em;
  color: var(--green-deep);
  line-height: 1.15;
}

.stat-label {
  margin-top: var(--space-1);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-mid);
}

/* ---------- 9. Section headings ---------- */
.section-head {
  max-width: 640px;
  margin-bottom: var(--space-12);
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.section-title {
  margin-top: var(--space-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text-hi);
}

.section-lead {
  margin-top: var(--space-3);
  font-size: 1.05rem;
  color: var(--text-mid);
}

/* ---------- 10. Products ---------- */
.products {
  background: var(--bg-1);
}

/* Flagship card */
.flagship {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-10);
  align-items: center;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px);
  border-radius: var(--r-xl);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  box-shadow: var(--shadow-2);
  margin-bottom: var(--space-16);
}

.flagship-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 55% 70% at 88% 10%, rgba(26, 122, 75, 0.06), transparent 70%);
}

.flagship-body {
  position: relative;
}

.flagship-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--r-full);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid rgba(169, 118, 31, 0.35);
  background: rgba(169, 118, 31, 0.08);
}

.flagship-badge svg {
  width: 12px;
  height: 12px;
}

.flagship-title {
  margin-top: var(--space-5);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.flagship-desc {
  margin-top: var(--space-4);
  color: var(--text-mid);
  font-size: 1.02rem;
}

.flagship-features {
  margin-top: var(--space-5);
  display: grid;
  gap: var(--space-3);
}

.flagship-features li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.95rem;
  color: var(--text);
}

.flagship-features svg {
  width: 18px;
  height: 18px;
  flex: none;
  color: var(--green);
}

.flagship-actions {
  margin-top: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Flagship window mock */
.flagship-art {
  position: relative;
}

.fs-window {
  border-radius: var(--r-lg);
  border: 1px solid var(--border-strong);
  background: var(--bg-0);
  box-shadow: var(--shadow-3);
  overflow: hidden;
  transform: rotate(-1deg);
  transition: transform var(--dur-slow) var(--ease);
}

.flagship:hover .fs-window {
  transform: rotate(0deg) translateY(-4px);
}

.fs-window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.fs-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--border-strong);
}

.fs-url {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-low);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: var(--r-full);
}

.fs-window-body {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 0;
}

.fs-side {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 10px;
  border-right: 1px solid var(--border);
  background: var(--surface-2);
}

.fs-side-item {
  height: 6px;
  border-radius: 3px;
  background: var(--border-strong);
}

.fs-side-item.is-on {
  background: var(--green);
}

.fs-main {
  padding: 16px;
  display: grid;
  gap: 14px;
}

.fs-kpi-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.fs-kpi {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px;
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-mid);
}

.fs-kpi-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-hi);
}

.fs-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 64px;
  padding: 10px;
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.fs-chart span {
  flex: 1;
  height: var(--h);
  border-radius: 2px 2px 0 0;
  background: var(--green);
  animation: fs-grow 1.2s var(--ease) both;
  transform-origin: bottom;
}

@keyframes fs-grow {
  from {
    transform: scaleY(0.2);
    opacity: 0.4;
  }
  to {
    transform: scaleY(1);
    opacity: 1;
  }
}

.fs-rows {
  display: grid;
  gap: 6px;
}

.fs-row {
  height: 8px;
  border-radius: 4px;
  background: var(--border);
}

.fs-row.is-live {
  background: var(--green);
  animation: fs-pulse 2.4s ease-in-out infinite;
}

@keyframes fs-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}

/* Categories */
.category {
  margin-bottom: var(--space-16);
}

.category:last-of-type {
  margin-bottom: 0;
}

.category-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.category-title svg {
  width: 22px;
  height: 22px;
  color: var(--green);
  flex: none;
}

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform var(--dur) var(--ease), border-color var(--dur) ease,
    box-shadow var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--green-line);
  box-shadow: var(--shadow-2);
}

.card-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  background: var(--green-soft);
  transition: transform var(--dur) var(--ease);
}

.card:hover .card-icon {
  transform: translateY(-2px);
}

.card-icon svg {
  width: 24px;
  height: 24px;
  color: var(--green-deep);
}

.card-icon-indigo,
.card-icon-cyan,
.card-icon-green,
.card-icon-amber {
  color: var(--green-deep);
  background: var(--green-soft);
}

.card-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.08rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.card-desc {
  font-size: 0.93rem;
  color: var(--text-mid);
}

.card-tags {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-2);
}

/* ---------- 11. Solutions ---------- */
.solutions {
  background: var(--bg-0);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.solution-card {
  min-height: 260px;
}

.card-meta {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-low);
  border-top: 1px solid var(--border);
  padding-top: var(--space-3);
}

/* ---------- 12. About ---------- */
.about {
  background: var(--bg-1);
}

.about-inner {
  max-width: 720px;
}

.about-text {
  margin-top: var(--space-5);
  display: grid;
  gap: var(--space-4);
  font-size: 1.05rem;
  color: var(--text-mid);
}

.about-text strong {
  color: var(--text-hi);
}

.about .btn {
  margin-top: var(--space-6);
}

/* ---------- 13. Contact ---------- */
.contact {
  background: var(--bg-0);
  padding-block: var(--space-20);
}

.contact-card {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-10);
  align-items: center;
  overflow: hidden;
  padding: clamp(32px, 6vw, 64px);
  border-radius: var(--r-xl);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  box-shadow: var(--shadow-2);
}

.contact-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 60% 80% at 90% 20%, rgba(26, 122, 75, 0.05), transparent 70%);
}

.contact-copy {
  position: relative;
  max-width: 620px;
}

.contact-copy .section-lead {
  margin-top: var(--space-4);
}

.contact-copy .btn {
  margin-top: var(--space-8);
}

.contact-note {
  margin-top: var(--space-3);
  font-size: 0.88rem;
  color: var(--text-low);
}

.contact-art {
  position: relative;
  display: grid;
  place-items: center;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--green-soft);
  border: 1px solid var(--green-line);
  animation: contact-float 6s var(--ease) infinite alternate;
}

.contact-art svg {
  width: 84px;
  height: 84px;
  color: var(--green-deep);
}

@keyframes contact-float {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-12px);
  }
}

/* ---------- 14. Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding-block: var(--space-8);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer-inner .brand {
  font-size: 1.05rem;
}

.footer-inner .brand-mark {
  width: 22px;
  height: 22px;
}

.footer-copy,
.footer-links {
  font-size: 0.88rem;
  color: var(--text-mid);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--green-deep);
  font-weight: 600;
  transition: color var(--dur) ease;
}

.footer-links a:hover {
  color: var(--text-hi);
}

/* ---------- 15. Scroll-reveal system ----------
   Content is visible by default. Only when the `js` class
   is present do elements start hidden and animate in.     */
.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  transition-delay: calc(var(--i, 0) * 80ms);
  will-change: opacity, transform;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Hero entrance (load-time) — guarded so no-js keeps content visible */
.hero-anim {
  opacity: 1;
}

.js .hero-anim {
  opacity: 0;
  animation: hero-rise 0.8s var(--ease) both;
}

.js .hero-eyebrow {
  animation-delay: 0.05s;
}

.js .hero-heading {
  animation-delay: 0.18s;
}

.js .hero-sub {
  animation-delay: 0.32s;
}

.js .hero-actions {
  animation-delay: 0.46s;
}

@keyframes hero-rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 16. Responsive ---------- */
@media (max-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .solution-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .flagship {
    grid-template-columns: 1fr;
  }

  .flagship-art {
    max-width: 460px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 700px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    padding: var(--space-5) var(--space-4) var(--space-6);
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--dur) var(--ease), opacity var(--dur) ease, visibility var(--dur);
  }

  .site-header.nav-open .site-nav {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

  .nav-link {
    padding: var(--space-3) var(--space-3);
    font-size: 1rem;
  }

  .btn-nav {
    justify-content: center;
  }

  .contact-card {
    grid-template-columns: 1fr;
  }

  .contact-art {
    display: none;
  }

  .footer-inner {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 560px) {
  .card-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding-block: var(--space-16);
  }

  .hero {
    min-height: auto;
    padding-top: var(--space-16);
  }
}

/* ---------- 17. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .js .reveal,
  .js .hero-anim {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .fs-chart span,
  .fs-row.is-live,
  .contact-art {
    animation: none;
  }
}