/* ──────────────────────────────────────────────────────────────────
   Gluehfaden — Software-Manufaktur
   Editorial · Industrial · Incandescent
   ────────────────────────────────────────────────────────────────── */

:root {
  /* Ink — warm coal, never blue-black */
  --ink: #0c0805;
  --ink-2: #14100a;
  --ink-3: #1d1812;

  /* Paper — warm cream, never pure white */
  --paper: #f1e7d2;
  --paper-2: #d8c9a8;
  --paper-3: #a8997a;

  /* Filament — incandescent amber spectrum */
  --filament: #ff9c3a;
  --filament-bright: #ffd9a8;
  --filament-deep: #c44a0a;
  --ember: #9a3408;

  /* Auxiliary */
  --smoke: #8c7559;
  --hairline: rgba(241, 231, 210, 0.12);
  --hairline-strong: rgba(241, 231, 210, 0.28);

  /* Typography */
  --font-display: "Instrument Serif", "Times New Roman", Georgia, serif;
  --font-body: "Newsreader", Georgia, serif;
  --font-label: "Antonio", "Arial Narrow", sans-serif;

  /* Spatial */
  --container: 1280px;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  font-family: var(--font-body);
  font-optical-sizing: auto;
  font-synthesis-weight: none;
  font-synthesis-style: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--paper);
  background:
    radial-gradient(ellipse 70vw 60vh at 50% -10%, rgba(255, 156, 58, 0.16), transparent 60%),
    radial-gradient(ellipse 80vw 40vh at 50% 110%, rgba(196, 74, 10, 0.12), transparent 70%),
    linear-gradient(180deg, var(--ink) 0%, #100b07 50%, var(--ink) 100%);
  background-attachment: fixed;
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ── Grain overlay ─────────────────────────────────────────── */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.09;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.88' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ── Reset ─────────────────────────────────────────────────── */
a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
h4,
ul,
ol,
dl,
dd {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

/* ── Header ────────────────────────────────────────────────── */
.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gutter);
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin: 0 auto;
  padding: 1.5rem 0 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: -0.005em;
}

.brand-mark {
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
  color: var(--filament);
  border: 1px solid var(--hairline-strong);
  border-radius: 50%;
  background: var(--ink-2);
  box-shadow:
    inset 0 0 12px rgba(255, 156, 58, 0.18),
    0 0 16px rgba(255, 156, 58, 0.16);
}

.brand-mark svg {
  width: 70%;
  height: 70%;
}

.brand-word em {
  font-style: italic;
  font-weight: 400;
  color: var(--filament-bright);
}

/* ── Nav ───────────────────────────────────────────────────── */
.main-nav {
  display: inline-flex;
  gap: 0.2rem;
  align-items: center;
  padding: 0.32rem;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: rgba(12, 8, 5, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.main-nav a {
  padding: 0.55rem 1rem;
  border-radius: 999px;
  color: var(--paper-2);
  font-family: var(--font-label);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  transition: color 0.2s ease, background 0.2s ease;
}

.main-nav a:hover {
  color: var(--paper);
  background: rgba(255, 156, 58, 0.08);
}

.main-nav .nav-cta {
  color: var(--ink);
  background: var(--filament);
  box-shadow: 0 0 24px rgba(255, 156, 58, 0.35);
}

.main-nav .nav-cta:hover {
  background: var(--filament-bright);
  color: var(--ink);
}

/* ── Marquee ───────────────────────────────────────────────── */
.marquee {
  position: relative;
  z-index: 2;
  overflow: hidden;
  padding: 0.95rem 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(to right, var(--ink-2), var(--ink), var(--ink-2));
  font-family: var(--font-label);
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--paper-2);
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  white-space: nowrap;
  width: max-content;
  animation: marquee 52s linear infinite;
}

.marquee-track .dot {
  color: var(--filament);
  font-size: 0.65rem;
  text-shadow: 0 0 8px rgba(255, 156, 58, 0.5);
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  position: relative;
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 3vw, 3rem);
  overflow: hidden;
  min-height: min(80vh, 720px);
  display: flex;
  align-items: center;
}

/* Hero background — slideshow container. */
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

/* Two stacked images that crossfade with ken-burns + blur. */
.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: right center;
  will-change: opacity, transform, filter;
  animation: heroSlide 16s ease-in-out infinite;
}

.hero-slide-1 {
  animation-delay: 0s;
}

.hero-slide-2 {
  animation-delay: -8s;
}

@keyframes heroSlide {
  0% {
    opacity: 1;
    transform: scale(1) translateX(0);
    filter: saturate(1.15);
  }
  44% {
    opacity: 1;
    transform: scale(1.07) translateX(-1.5%);
    filter: saturate(1.15);
  }
  50% {
    opacity: 0;
    transform: scale(1.1) translateX(-2.2%);
    filter: blur(10px) saturate(1.2);
  }
  94% {
    opacity: 0;
    transform: scale(1) translateX(0);
    filter: blur(10px) saturate(1.2);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateX(0);
    filter: saturate(1.15);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide {
    animation: none;
  }
  .hero-slide-2 {
    opacity: 0;
  }
}

/* Gradient overlay removed — body gradient shows through cleanly.
   Text legibility is preserved by the headline/lead text-shadows. */

/* Vertically centred content on the dark left half */
.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-content-inner {
  max-width: 38rem;
}

.hero-meta {
  display: flex;
  gap: 0.75rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
  flex-wrap: wrap;
}

.stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  color: var(--paper-2);
  font-family: var(--font-label);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  background: rgba(20, 16, 10, 0.4);
}

.stamp::before {
  content: "✦";
  color: var(--filament);
  font-size: 0.6rem;
}

.stamp--live {
  color: var(--filament);
  border-color: rgba(255, 156, 58, 0.4);
  background: rgba(255, 156, 58, 0.06);
}

.stamp--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--filament);
  box-shadow: 0 0 10px var(--filament);
  animation: pulse-live 2.4s ease-in-out infinite;
}

@keyframes pulse-live {
  0%, 100% { opacity: 0.45; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.1); }
}

/* Headline */
.hero-headline {
  position: relative;
  margin-bottom: 1.8rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.6rem, 6.4vw, 5.2rem);
  line-height: 1.02;
  letter-spacing: -0.022em;
  text-shadow: 0 2px 24px rgba(12, 8, 5, 0.55);
}

.hero-headline .line {
  display: block;
}

.hero-headline .line-1 { padding-left: 0; }
.hero-headline .line-2 { padding-left: clamp(1rem, 6vw, 4.5rem); }
.hero-headline .line-3 { padding-left: clamp(0rem, 2vw, 1.5rem); }
.hero-headline .line-4 { padding-left: clamp(2rem, 12vw, 9rem); }

.hero-headline em {
  position: relative;
  display: inline-block;
  font-style: italic;
  font-weight: 400;
  color: var(--filament-bright);
  padding: 0 0.06em;
}

.hero-headline em::after {
  content: "";
  position: absolute;
  left: 0.06em;
  right: 0.06em;
  bottom: 0.12em;
  height: 7px;
  background: linear-gradient(
    to right,
    transparent,
    var(--filament) 12%,
    var(--filament-bright) 50%,
    var(--filament) 88%,
    transparent
  );
  border-radius: 999px;
  filter: blur(3px);
  opacity: 0.8;
  animation: filament-pulse 4.5s ease-in-out infinite;
}

@keyframes filament-pulse {
  0%, 100% { opacity: 0.55; filter: blur(3px); }
  50% { opacity: 1; filter: blur(2px); }
}

/* Hero lead (standalone — image now occupies the right column) */
.hero-lead {
  max-width: 34rem;
  margin-bottom: 2.5rem;
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 1.35vw, 1.3rem);
  line-height: 1.55;
  color: var(--paper-2);
  font-variation-settings: "opsz" 28, "wght" 420;
  text-shadow: 0 1px 8px rgba(12, 8, 5, 0.65);
}

/* Hero actions */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  font-family: var(--font-label);
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.25s ease;
  background: transparent;
  color: var(--paper);
}

.button.primary {
  color: var(--ink);
  background: linear-gradient(135deg, var(--filament-bright), var(--filament));
  border-color: var(--filament);
  box-shadow:
    0 0 32px rgba(255, 156, 58, 0.32),
    inset 0 0 0 1px rgba(255, 215, 168, 0.5);
}

.button.primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 12px 40px rgba(255, 156, 58, 0.55),
    inset 0 0 0 1px rgba(255, 215, 168, 0.7);
}

.button.ghost:hover {
  background: rgba(255, 156, 58, 0.06);
  border-color: var(--filament);
  color: var(--filament-bright);
}

.button .arrow {
  display: inline-block;
  transition: transform 0.25s ease;
}

.button:hover .arrow {
  transform: translate(3px, -3px);
}

/* Filament decoration */
.filament {
  position: relative;
  height: 40px;
  margin: 0 calc(var(--gutter) * -0.5) 1.5rem;
  opacity: 0.7;
  pointer-events: none;
}

.filament svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 8px rgba(255, 156, 58, 0.55));
}

.filament path {
  animation: filament-glow 6s ease-in-out infinite;
}

@keyframes filament-glow {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

/* Metrics */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 760px;
}

.hero-metrics > div {
  padding: 1.4rem 1.4rem 1.4rem 0;
  border-right: 1px solid var(--hairline);
}

.hero-metrics > div + div {
  padding-left: 1.4rem;
}

.hero-metrics > div:last-child {
  border-right: none;
}

.hero-metrics dt {
  margin-bottom: 0.45rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.6rem, 2.1vw, 1.95rem);
  font-weight: 400;
  color: var(--filament);
  letter-spacing: -0.015em;
}

.hero-metrics dd {
  margin: 0;
  font-family: var(--font-label);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--paper-2);
}

/* ── Section shells ────────────────────────────────────────── */
section {
  position: relative;
  z-index: 2;
}

.services,
.process,
.principles,
.contact {
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 7rem) 0;
  border-top: 1px solid var(--hairline);
}

.section-mast {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: end;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-mast--narrow {
  grid-template-columns: 1fr;
  max-width: 760px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 1.2rem;
  font-family: var(--font-label);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--filament);
}

.display-h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5.6vw, 5rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.022em;
}

.display-h2 em {
  font-style: italic;
  font-weight: 400;
  color: var(--filament-bright);
}

.section-lead {
  max-width: 28rem;
  font-family: var(--font-body);
  font-size: 1.08rem;
  line-height: 1.6;
  color: var(--paper-2);
  font-variation-settings: "opsz" 28;
}

/* ── Services ──────────────────────────────────────────────── */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  overflow: hidden;
}

.service-card {
  position: relative;
  padding: clamp(1.5rem, 2.5vw, 2.25rem);
  background: var(--ink-2);
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  transition: background 0.3s ease;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  inset: auto -60% -90% auto;
  width: 280%;
  height: 280%;
  background: radial-gradient(
    circle,
    rgba(255, 156, 58, 0.16),
    transparent 50%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.service-card:hover {
  background: var(--ink-3);
}

.service-card:hover::before {
  opacity: 1;
}

.service-card--accent {
  background: linear-gradient(180deg, var(--ink-3), var(--ink-2));
}

.service-card header {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.numeral {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: 1rem;
  color: var(--filament);
  letter-spacing: 0.02em;
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 2.7vw, 2.5rem);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.015em;
}

.service-card > p {
  position: relative;
  color: var(--paper-2);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  font-variation-settings: "opsz" 22;
}

.card-tags {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 1.4rem;
  border-top: 1px solid var(--hairline);
}

.card-tags li {
  padding: 0.32rem 0.7rem;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  font-family: var(--font-label);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-2);
}

/* ── Process timeline ──────────────────────────────────────── */
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding-top: 4rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(4rem + 0.55rem);
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--filament) 8%,
    var(--filament-bright) 50%,
    var(--filament) 92%,
    transparent
  );
  filter: drop-shadow(0 0 6px rgba(255, 156, 58, 0.45));
}

.timeline li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding-top: 2.5rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  top: -0.05rem;
  left: 0;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  background: var(--filament);
  box-shadow:
    0 0 0 4px var(--ink),
    0 0 16px rgba(255, 156, 58, 0.65);
}

.timeline li:nth-child(odd)::before {
  animation: node-pulse 4s ease-in-out infinite;
}

.timeline li:nth-child(even)::before {
  animation: node-pulse 4s ease-in-out infinite 2s;
}

@keyframes node-pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--ink), 0 0 14px rgba(255, 156, 58, 0.5); }
  50% { box-shadow: 0 0 0 4px var(--ink), 0 0 22px rgba(255, 156, 58, 0.85); }
}

.step-numeral {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: 1.05rem;
  color: var(--filament);
}

.timeline h3 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 2.5vw, 2.3rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.015em;
}

.timeline p {
  font-family: var(--font-body);
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--paper-2);
  font-variation-settings: "opsz" 22;
}

/* ── Principles ────────────────────────────────────────────── */
.principles {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.principles-aside .display-h2 {
  margin-top: 0;
}

.principles-aside .aside-note {
  margin-top: 1.5rem;
  font-family: var(--font-body);
  font-size: 1.02rem;
  color: var(--smoke);
  font-style: italic;
  font-variation-settings: "opsz" 22, "wght" 420;
}

.principles-list {
  display: flex;
  flex-direction: column;
}

.principles-list li {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--hairline);
}

.principles-list li:first-child {
  padding-top: 0;
}

.principles-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.rule {
  display: block;
  width: 100%;
  height: 1px;
  margin-top: 1rem;
  background: var(--filament);
  box-shadow: 0 0 10px rgba(255, 156, 58, 0.6);
}

.principles-list h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.3vw, 2.1rem);
  font-weight: 400;
  margin-bottom: 0.55rem;
  letter-spacing: -0.015em;
}

.principles-list p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--paper-2);
  font-variation-settings: "opsz" 22;
}

/* ── Contact ───────────────────────────────────────────────── */
.contact-frame {
  position: relative;
  padding: clamp(2.5rem, 5vw, 4.5rem);
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  background:
    radial-gradient(ellipse at 100% 0%, rgba(255, 156, 58, 0.15), transparent 60%),
    linear-gradient(180deg, var(--ink-3), var(--ink-2));
  overflow: hidden;
}

.contact-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      135deg,
      transparent,
      transparent 38px,
      rgba(255, 156, 58, 0.04) 38px,
      rgba(255, 156, 58, 0.04) 39px
    );
  pointer-events: none;
}

.contact-headline {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6.6vw, 5.4rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

.contact-headline em {
  font-style: italic;
  font-weight: 400;
  color: var(--filament-bright);
}

.contact-lead {
  position: relative;
  max-width: 36rem;
  margin-bottom: 2.5rem;
  font-family: var(--font-body);
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--paper-2);
  font-variation-settings: "opsz" 28;
}

.contact-email {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 1.5rem;
  padding: 1.75rem 0 0.5rem;
  border-top: 1px solid var(--hairline-strong);
}

.contact-email .email-label {
  font-family: var(--font-label);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--filament);
}

.contact-email .email-address {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.6rem, 3.7vw, 2.95rem);
  font-weight: 400;
  color: var(--paper);
  letter-spacing: -0.015em;
  text-decoration: underline;
  text-decoration-color: rgba(255, 156, 58, 0.35);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.25s ease, text-decoration-color 0.25s ease;
}

.contact-email:hover .email-address {
  color: var(--filament-bright);
  text-decoration-color: var(--filament-bright);
}

.email-arrow {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--filament);
  transition: transform 0.3s ease;
}

.contact-email:hover .email-arrow {
  transform: translateX(10px);
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin: 0 auto;
  padding: 3rem 0 4rem;
  border-top: 1px solid var(--hairline);
}

.footer-stamp {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.stamp-seal {
  display: block;
  width: 5.5rem;
  height: 5.5rem;
  color: var(--filament);
  animation: spin 50s linear infinite;
  flex-shrink: 0;
}

.stamp-seal svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 8px rgba(255, 156, 58, 0.35));
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.colophon {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--paper-2);
  font-variation-settings: "opsz" 20;
}

.colophon strong {
  color: var(--paper);
  font-weight: 400;
  font-family: var(--font-display);
  font-size: 1.1em;
  letter-spacing: -0.005em;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  font-family: var(--font-label);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--filament);
  transition: all 0.25s ease;
}

.back-to-top:hover {
  color: var(--filament-bright);
  border-color: var(--filament);
  background: rgba(255, 156, 58, 0.06);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 980px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .main-nav {
    width: 100%;
    overflow-x: auto;
    border-radius: 1rem;
    justify-content: flex-start;
    -webkit-overflow-scrolling: touch;
  }

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

  .section-mast {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    align-items: start;
  }

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

  .timeline {
    grid-template-columns: 1fr;
    gap: 2.25rem;
    padding-top: 0.5rem;
  }

  .timeline::before {
    width: 1px;
    height: calc(100% - 1rem);
    top: 0.4rem;
    left: 0.55rem;
    right: auto;
    background: linear-gradient(
      to bottom,
      transparent,
      var(--filament) 8%,
      var(--filament-bright) 50%,
      var(--filament) 92%,
      transparent
    );
  }

  .timeline li {
    padding-top: 0;
    padding-left: 2.5rem;
  }

  .timeline li::before {
    top: 0.25rem;
    left: 0;
  }

  .principles {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .back-to-top {
    justify-self: start;
  }
}

@media (max-width: 580px) {
  .hero-metrics {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .hero-metrics > div {
    padding: 1.25rem 0;
    border-right: none;
    border-bottom: 1px solid var(--hairline);
  }

  .hero-metrics > div + div {
    padding-left: 0;
  }

  .hero-metrics > div:last-child {
    border-bottom: none;
  }

  .hero-headline .line-2,
  .hero-headline .line-3,
  .hero-headline .line-4 {
    padding-left: 0;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    justify-content: space-between;
  }

  .principles-list li {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .rule {
    display: none;
  }

  .contact-email {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .email-arrow {
    justify-self: start;
  }
}

/* ── Reduced motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}