/* Essenvian — global design system */

:root {
  --ink: #121412;
  --ink-soft: #2a2e2a;
  --muted: #5c635c;
  --paper: #f3f4f1;
  --paper-deep: #e8ebe5;
  --surface: #fafaf8;
  --line: rgba(18, 20, 18, 0.1);
  --line-strong: rgba(18, 20, 18, 0.18);
  --accent: #1f3d34;
  --accent-soft: #2f5649;
  --accent-wash: rgba(31, 61, 52, 0.08);
  --danger: #7a2e2e;
  --danger-bg: #f7ecec;
  --success: #1f5a2f;
  --success-bg: #e9f3eb;
  --shadow: 0 18px 48px rgba(18, 20, 18, 0.08);
  --radius: 0.4rem;
  --font-display: "Cormorant Garamond", "Times New Roman", serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;
  --container: min(92%, 112rem);
  --header-h: 7.2rem;
}

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1.6rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 8% -10%, rgba(31, 61, 52, 0.07), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(18, 20, 18, 0.04), transparent 50%),
    var(--paper);
  transition: opacity 420ms cubic-bezier(0.22, 0.9, 0.32, 1), transform 420ms cubic-bezier(0.22, 0.9, 0.32, 1);
}

img,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
}

p {
  margin: 0 0 1.4rem;
  color: var(--muted);
}

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

h1,
h2,
h3,
h4 {
  margin: 0 0 1.2rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h1 {
  font-size: clamp(3.6rem, 5.5vw, 5.6rem);
}

h2 {
  font-size: clamp(2.8rem, 4vw, 4rem);
}

h3 {
  font-size: clamp(2.2rem, 2.6vw, 2.6rem);
}

h4 {
  font-family: var(--font-body);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 1.6rem;
  top: -100px;
  z-index: 100;
  padding: 1rem 1.4rem;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus {
  top: 1.6rem;
}

/* Header / Nav */
header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(243, 244, 241, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 2rem;
}

.navbar__logo {
  margin: 0;
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.navbar__logo a {
  display: inline-block;
}

.navbar__logo a:hover,
.navbar__logo a:focus-visible {
  color: var(--accent);
}

.navbar__toggle {
  display: none;
  border: 1px solid var(--line-strong);
  background: transparent;
  width: 4.4rem;
  height: 4.4rem;
  border-radius: var(--radius);
  font-size: 2rem;
  cursor: pointer;
  color: var(--ink);
}

.navbar__list {
  display: flex;
  align-items: center;
  gap: 0.4rem 2.4rem;
  list-style: none;
}

.navbar__link {
  position: relative;
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  transition: color 0.25s ease;
}

.navbar__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.5rem;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.navbar__link:hover,
.navbar__link:focus-visible,
.navbar__link.is-active {
  color: var(--ink);
}

.navbar__link.is-active::after,
.navbar__link:hover::after,
.navbar__link:focus-visible::after {
  transform: scaleX(1);
}

/* Buttons */
.button,
.button.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  padding: 1.25rem 2.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-family: var(--font-body);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.button:hover,
.button:focus-visible {
  background: var(--accent);
  transform: translateY(-1px);
}

.button.secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  background: var(--ink);
  color: #fff;
}

.button.light {
  background: #fff;
  color: var(--ink);
}

.button.light:hover,
.button.light:focus-visible {
  background: var(--paper-deep);
  color: var(--ink);
}

.button.on-dark {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.button.on-dark:hover,
.button.on-dark:focus-visible {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 2.4rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: flex-end;
  padding: 0;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 72% 38%, rgba(47, 86, 73, 0.38), transparent 55%),
    radial-gradient(ellipse 50% 40% at 18% 82%, rgba(31, 61, 52, 0.45), transparent 50%),
    linear-gradient(145deg, #0b100e 0%, #15201b 42%, #1a2e26 100%);
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.4;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 4.8rem 4.8rem;
  animation: hero-grid 28s linear infinite;
}

@keyframes hero-grid {
  from { background-position: 0 0; }
  to { background-position: 4.8rem 4.8rem; }
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(105deg, rgba(8, 12, 10, 0.55) 0%, rgba(8, 12, 10, 0.18) 55%, transparent 100%),
    linear-gradient(0deg, rgba(8, 12, 10, 0.7) 0%, transparent 45%);
}

.hero__inner {
  position: relative;
  z-index: 3;
  width: var(--container);
  margin: 0 auto;
  padding: 10rem 0 8rem;
  max-width: 68rem;
  color: #fff;
}

.brand-mark {
  margin: 0 0 1.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 2.4vw, 2.2rem);
  font-weight: 500;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.88);
}

.hero__title {
  margin: 0 0 1.8rem;
  color: #fff;
  font-size: clamp(4.2rem, 7vw, 7.2rem);
}

.hero__subtitle {
  margin: 0 0 2.8rem;
  max-width: 48rem;
  font-size: 1.8rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.86);
}

.eyebrow {
  margin: 0 0 1.2rem;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-soft);
}

.hero .eyebrow {
  color: rgba(255, 255, 255, 0.72);
}

/* Sections */
main {
  overflow-x: hidden;
}

section {
  padding: 9rem 0;
}

.section-intro {
  max-width: 68rem;
  margin-bottom: 4rem;
}

.section-intro p {
  font-size: 1.8rem;
}

.section-kicker {
  margin-bottom: 1rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
}

.panel--accent {
  background:
    linear-gradient(135deg, rgba(31, 61, 52, 0.94), rgba(18, 28, 24, 0.96)),
    var(--accent);
  color: #fff;
  border: 0;
}

.panel--accent h2,
.panel--accent h3,
.panel--accent p {
  color: #fff;
}

.panel--accent p {
  color: rgba(255, 255, 255, 0.84);
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: start;
}

.split--media {
  align-items: center;
}

.split__media {
  overflow: hidden;
  border-radius: var(--radius);
  min-height: 36rem;
  background: var(--paper-deep);
}

.split__media img {
  width: 100%;
  height: 100%;
  min-height: 36rem;
  object-fit: cover;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--line);
}

.stat {
  padding-right: 1rem;
}

.stat__value {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 3.4rem;
  color: var(--ink);
  line-height: 1;
}

.stat__label {
  margin: 0;
  font-size: 1.4rem;
  color: var(--muted);
}

/* Application / content blocks — not interaction cards; editorial blocks */
.block-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.4rem;
}

.block {
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.block__media {
  margin-bottom: 1.8rem;
  overflow: hidden;
  border-radius: var(--radius);
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(145deg, rgba(31, 61, 52, 0.12), rgba(31, 61, 52, 0.02)),
    var(--paper-deep);
  border: 1px solid var(--line);
  display: flex;
  align-items: flex-end;
  padding: 2rem;
}

.block__media span {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.block h3 {
  margin-bottom: 0.8rem;
}

.block p {
  margin-bottom: 1.4rem;
}

.block a {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.block a:hover,
.block a:focus-visible {
  border-bottom-color: var(--accent);
}

.detail-list {
  list-style: none;
  display: grid;
  gap: 1.6rem;
}

.detail-list li {
  position: relative;
  padding-left: 2rem;
  color: var(--muted);
}

.detail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--accent);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.process-step {
  padding: 2.4rem 0 0;
  border-top: 1px solid var(--line-strong);
}

.process-step__num {
  display: block;
  margin-bottom: 1.4rem;
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--accent);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.4rem;
  margin-top: 4rem;
}

.capability {
  padding: 2.8rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.capability h3 {
  margin-bottom: 1rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.4rem;
  margin-top: 3rem;
}

.team-member {
  padding: 2.8rem 0 0;
  border-top: 1px solid var(--line-strong);
}

.team-member__role {
  margin: 0 0 1rem;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.4rem;
  margin-top: 3rem;
}

.value-item {
  padding: 2.4rem;
  background: var(--accent-wash);
  border-radius: var(--radius);
}

.cta-band {
  text-align: left;
}

.cta-band .container {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 3rem;
  flex-wrap: wrap;
}

.cta-band__copy {
  max-width: 56rem;
}

/* Page headers (inner pages) */
.page-hero {
  padding: 8rem 0 5rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(31, 61, 52, 0.06), transparent 70%),
    var(--paper);
}

.page-hero h1 {
  margin-bottom: 1.6rem;
}

.page-hero p {
  max-width: 62rem;
  font-size: 1.8rem;
}

.page-section {
  padding: 7rem 0;
}

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

.use-cases {
  margin-top: 5rem;
  padding-top: 4rem;
  border-top: 1px solid var(--line);
}

.use-cases ul {
  list-style: none;
  display: grid;
  gap: 1.6rem;
  margin-top: 2rem;
}

.use-cases li {
  padding: 1.8rem 2rem;
  background: var(--surface);
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

/* Contact */
.contact-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: start;
}

form {
  max-width: none;
  padding: 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

.form-field {
  margin-bottom: 1.8rem;
}

.form-field label {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  transition: border-color 0.2s ease, outline 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid rgba(31, 61, 52, 0.25);
  border-color: var(--accent);
}

.success-banner,
.error-banner {
  padding: 1.4rem 1.6rem;
  border-radius: var(--radius);
  margin-bottom: 2rem;
  border: 1px solid transparent;
}

.success-banner {
  background: var(--success-bg);
  color: var(--success);
  border-color: #c7e0cc;
}

.error-banner {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: #e2c4c4;
}

.office-info h2 {
  margin-bottom: 1.4rem;
}

.office-info p {
  margin-bottom: 1.2rem;
}

.office-meta {
  display: grid;
  gap: 0.8rem;
  margin: 2rem 0 2.4rem;
}

.office-meta a {
  color: var(--accent);
  font-weight: 600;
}

.map-frame {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--paper-deep);
}

.map-frame iframe {
  display: block;
  width: 100%;
  min-height: 32rem;
  border: 0;
}

/* 404 */
.not-found {
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: 8rem 0;
}

.not-found h1 {
  font-size: clamp(6rem, 12vw, 10rem);
  margin-bottom: 1rem;
}

/* Footer */
.site-footer {
  background: #101412;
  color: rgba(255, 255, 255, 0.72);
  border-top: 0;
  padding: 5rem 0 2.4rem;
}

.site-footer .footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 3rem;
}

.site-footer .navbar__logo,
.site-footer h4,
.site-footer a {
  color: #fff;
}

.footer__desc {
  color: rgba(255, 255, 255, 0.68);
  max-width: 32rem;
}

.footer__links ul,
.social-list {
  list-style: none;
}

.footer__links li {
  margin: 0.8rem 0;
}

.footer__links a,
.footer__contact a {
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.2s ease;
}

.footer__links a:hover,
.footer__contact a:hover,
.social-link:hover {
  color: #fff;
}

.social-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 4.2rem;
  height: 3.6rem;
  padding: 0 1rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.social-link:hover,
.social-link:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.4);
  transform: none;
}

.footer__bottom {
  margin-top: 3.2rem;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
}

/* Motion */
body.page-enter {
  opacity: 0;
  transform: translateY(6px);
}

body.page-exit {
  opacity: 0;
  transform: translateY(-6px);
}

.animate-fade-up {
  opacity: 0;
  transform: translateY(14px);
  will-change: opacity, transform;
  transition:
    opacity 640ms cubic-bezier(0.22, 0.9, 0.32, 1) var(--delay, 0ms),
    transform 640ms cubic-bezier(0.22, 0.9, 0.32, 1) var(--delay, 0ms);
}

.animate-fade-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  body,
  .animate-fade-up {
    transition: none !important;
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}

/* Responsive */
@media screen and (max-width: 1100px) {
  .block-grid,
  .process-grid,
  .team-grid,
  .site-footer .footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 900px) {
  .split,
  .contact-layout,
  .capability-grid,
  .values-grid,
  .stat-row {
    grid-template-columns: 1fr;
  }

  .split__media,
  .split__media img {
    min-height: 28rem;
  }
}

@media screen and (max-width: 768px) {
  .navbar {
    flex-wrap: wrap;
    min-height: auto;
    padding: 1.4rem 0;
  }

  .navbar__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .navbar__list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.4rem;
    padding: 0.8rem 0 1.2rem;
  }

  .navbar__list.is-open {
    display: flex;
  }

  .hero__inner {
    padding: 8rem 0 6rem;
  }

  .hero__subtitle {
    font-size: 1.6rem;
  }

  section,
  .page-section {
    padding: 6rem 0;
  }

  .block-grid,
  .process-grid,
  .team-grid,
  .site-footer .footer__inner,
  .capability-grid {
    grid-template-columns: 1fr;
  }

  .cta-band .container {
    align-items: flex-start;
  }
}