:root {
  --ink: #0a0a0a;
  --ink-soft: #4b4b4f;
  --paper: #ffffff;
  --paper-soft: #f6f6f4;
  --line: #e4e4e1;
  --line-strong: #cfcfca;
  --accent: #f5c518;
  --accent-strong: #e0b400;
  --accent-ink: #1a1a00;
  --ok: #1a7f37;
  --err: #c4341c;
  --max: 1180px;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(10, 10, 10, 0.06);
  --shadow: 0 20px 50px rgba(10, 10, 10, 0.10);
  --font: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

.container {
  width: min(var(--max), calc(100% - 2.5rem));
  margin-inline: auto;
}

.eyebrow {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.accent-bar {
  width: 44px;
  height: 4px;
  background: var(--accent);
  border-radius: 4px;
  margin: 0 0 1.25rem;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  font-weight: 800;
}

h3 {
  font-size: 1.18rem;
  font-weight: 700;
}

p {
  margin: 0 0 1rem;
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 62ch;
}

.muted {
  color: var(--ink-soft);
}

/* Buttons */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1.5px solid var(--btn-bg);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border-radius: 999px;
  padding: 0.85rem 1.4rem;
  font-weight: 700;
  font-size: 0.96rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, color 140ms ease;
}

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

.btn-accent {
  --btn-bg: var(--accent);
  --btn-fg: var(--accent-ink);
  border-color: var(--accent);
}

.btn-accent:hover {
  --btn-bg: var(--accent-strong);
  border-color: var(--accent-strong);
}

.btn-ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  --btn-bg: var(--paper-soft);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0.04em;
  font-size: 1.1rem;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.nav-links a {
  text-decoration: none;
  font-weight: 600;
  color: var(--ink-soft);
  font-size: 0.98rem;
  transition: color 120ms ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  border-radius: 10px;
  width: 44px;
  height: 40px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  position: relative;
  transition: transform 160ms ease, opacity 160ms ease;
}

.nav-toggle span::before {
  position: absolute;
  top: -6px;
}

.nav-toggle span::after {
  position: absolute;
  top: 6px;
}

/* Sections */
.section {
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.section-head {
  max-width: 70ch;
  margin-bottom: 2.5rem;
}

.section-soft {
  background: var(--paper-soft);
  border-block: 1px solid var(--line);
}

/* Hero */
.hero {
  padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.hero h1 {
  margin-bottom: 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.75rem;
}

.hero-foot {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  align-items: center;
  color: var(--ink-soft);
  font-size: 0.92rem;
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}

/* Metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.metric {
  background: var(--paper);
  padding: 1.6rem 1.4rem;
}

.metric .num {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.metric .label {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

/* Card grids */
.grid {
  display: grid;
  gap: 1.25rem;
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--line-strong);
}

.card .card-index {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent-strong);
  text-transform: uppercase;
}

.card h3 {
  margin: 0.6rem 0 0.5rem;
}

.card p:last-child {
  margin-bottom: 0;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  font-weight: 700;
  text-decoration: none;
  font-size: 0.95rem;
}

.card-link::after {
  content: "->";
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  counter-reset: step;
}

.step {
  position: relative;
  padding-top: 1.5rem;
  border-top: 3px solid var(--ink);
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--accent-strong);
}

.step h3 {
  margin: 0.5rem 0 0.4rem;
}

/* Projects */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.filter-btn {
  border: 1.5px solid var(--line-strong);
  background: var(--paper);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--ink-soft);
  transition: all 140ms ease;
}

.filter-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.filter-btn.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.project {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper);
  display: flex;
  flex-direction: column;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.project:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.project-media {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #131313, #2b2b2b);
  position: relative;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 0.85rem;
}

.project:nth-child(3n + 1) .project-media {
  background: linear-gradient(135deg, #1a1a1a, #3a3a3a);
}

.project:nth-child(3n + 2) .project-media {
  background: linear-gradient(135deg, #20201a, #4a4630);
}

.project:nth-child(3n) .project-media {
  background: linear-gradient(135deg, #111418, #2c3440);
}

.project-media .tag {
  position: absolute;
  top: 0.85rem;
  left: 0.85rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
}

.project-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.project-result {
  font-weight: 800;
  color: var(--ink);
}

.project-meta {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.84rem;
}

/* Split feature */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.stack-list {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 0;
  display: grid;
  gap: 0.85rem;
}

.stack-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.stack-list li::before {
  content: "";
  flex: none;
  margin-top: 0.55rem;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--accent);
}

/* Contact / form */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.contact-info dl {
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1rem;
}

.contact-info dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  font-weight: 700;
}

.contact-info dd {
  margin: 0.2rem 0 0;
  font-weight: 600;
  font-size: 1.05rem;
}

.contact-info a {
  text-decoration: none;
}

.form-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.4rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-sm);
}

form .field {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

form .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  font-weight: 600;
  font-size: 0.92rem;
}

label .req {
  color: var(--err);
}

input,
select,
textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--line-strong);
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(245, 197, 24, 0.35);
}

textarea {
  min-height: 130px;
  resize: vertical;
}

input.invalid,
select.invalid,
textarea.invalid {
  border-color: var(--err);
  box-shadow: 0 0 0 3px rgba(196, 52, 28, 0.18);
}

.field-error {
  color: var(--err);
  font-size: 0.82rem;
  min-height: 1em;
}

.file-field input[type="file"] {
  padding: 0.55rem;
  background: var(--paper-soft);
}

.consent {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.consent input {
  width: auto;
  margin-top: 0.25rem;
}

.form-note {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 0.75rem;
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status {
  margin-top: 1rem;
  border-radius: 10px;
  padding: 0.9rem 1rem;
  font-weight: 600;
  display: none;
}

.form-status.show {
  display: block;
}

.form-status.ok {
  background: rgba(26, 127, 55, 0.1);
  color: var(--ok);
  border: 1px solid rgba(26, 127, 55, 0.3);
}

.form-status.err {
  background: rgba(196, 52, 28, 0.1);
  color: var(--err);
  border: 1px solid rgba(196, 52, 28, 0.3);
}

/* CTA band */
.cta-band {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: clamp(2rem, 5vw, 3.5rem);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
}

.cta-band h2 {
  max-width: 22ch;
}

.cta-band .btn-ghost {
  --btn-fg: var(--paper);
  border-color: rgba(255, 255, 255, 0.4);
}

.cta-band .btn-ghost:hover {
  --btn-bg: rgba(255, 255, 255, 0.1);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 3rem 0 2.5rem;
  background: var(--paper-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
}

.footer-grid h4 {
  margin: 0 0 0.85rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 600;
}

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

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.preview-ribbon {
  background: var(--accent);
  color: var(--accent-ink);
  text-align: center;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.45rem 1rem;
}

/* Responsive */
@media (max-width: 940px) {
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3,
  .project-grid,
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    inset: 76px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1.25rem 1.25rem;
    box-shadow: var(--shadow);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 1.05rem;
  }

  .nav-actions .btn:not(.nav-toggle) {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .grid-2,
  .grid-3,
  .project-grid,
  .steps,
  .metrics,
  form .row,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}