/* ============================================
   LUMEN CAPITAL  ·  Design System
   Light institutional theme: cream + navy + gold
   ============================================ */

:root {
  --navy: #1A2849;
  --navy-deep: #131E38;
  --navy-soft: #2A3A60;
  --gold: #C9A961;
  --gold-soft: rgba(201, 169, 97, 0.12);
  --bone: #F5F1E8;
  --cream: #FAF7EF;
  --pearl: #FFFFFF;
  --slate: #5A6478;
  --slate-light: #8E96A6;
  --ash: #DCD6C7;
  --ash-light: #E8E2D3;
  --graphite: var(--navy);

  --serif: 'Cormorant Garamond', 'Playfair Display', Georgia, serif;
  --sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --mono: 'JetBrains Mono', 'Courier New', monospace;

  --max-width: 1440px;
  --gutter: clamp(24px, 6vw, 120px);
  --section-y: clamp(96px, 14vw, 200px);
}

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

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

body {
  background: var(--cream);
  color: var(--navy);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.1;
  color: var(--navy);
}

h1 {
  font-size: clamp(40px, 6vw, 88px);
  line-height: 1.05;
}

h2 {
  font-size: clamp(32px, 4.5vw, 60px);
  line-height: 1.1;
}

h3 {
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.2;
}

h4 {
  font-size: clamp(18px, 1.6vw, 22px);
  font-family: var(--sans);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--navy);
}

p {
  color: var(--slate);
  font-size: clamp(15px, 1.1vw, 18px);
  line-height: 1.7;
  max-width: 64ch;
}

p.lead {
  color: var(--navy);
  font-size: clamp(18px, 1.4vw, 22px);
  line-height: 1.55;
  max-width: 60ch;
  font-weight: 400;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 24px;
  display: inline-block;
}

.numeral {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.1em;
}

a {
  color: var(--navy);
  text-decoration: none;
  transition: color 300ms ease;
}

a:hover {
  color: var(--gold);
}

/* ============================================
   LAYOUT
   ============================================ */

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

.section {
  padding: var(--section-y) 0;
  border-bottom: 1px solid var(--ash);
}

.section--bone,
.section--graphite {
  background: var(--bone);
}

.section--navy {
  background: var(--navy);
  color: var(--bone);
}

.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy h4 {
  color: var(--cream);
}

.section--navy p {
  color: rgba(245, 241, 232, 0.75);
}

.section--navy p.lead {
  color: var(--cream);
}

.section--navy .eyebrow {
  color: var(--gold);
}

.section--centered {
  text-align: center;
}

.section--centered p,
.section--centered .lead {
  margin-left: auto;
  margin-right: auto;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(40px, 6vw, 120px);
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--ash);
  border-top: 1px solid var(--ash);
  border-bottom: 1px solid var(--ash);
}

.grid-3 > div {
  background: var(--cream);
  padding: 48px 40px;
}

.section--bone .grid-3 > div,
.section--graphite .grid-3 > div {
  background: var(--bone);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--ash);
  border: 1px solid var(--ash);
}

.grid-4 > article {
  background: var(--cream);
  padding: 56px 48px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background 400ms ease;
}

.section--bone .grid-4 > article,
.section--graphite .grid-4 > article {
  background: var(--bone);
}

.grid-4 > article:hover {
  background: var(--pearl);
}

@media (max-width: 900px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .grid-4 > article {
    padding: 40px 32px;
    min-height: auto;
  }
  .grid-3 > div {
    padding: 40px 32px;
  }
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 247, 239, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--ash);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo img {
  height: 56px;
  width: auto;
  display: block;
}

.nav__links {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav__links a {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--slate);
  position: relative;
  padding: 6px 0;
  font-weight: 500;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--navy);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 300ms ease;
}

.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}

.nav__cta {
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 24px;
  border: 1px solid var(--navy);
  color: var(--navy);
  transition: background 300ms ease, color 300ms ease;
  font-weight: 500;
  white-space: nowrap;
}

.nav__cta:hover {
  background: var(--navy);
  color: var(--cream);
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  color: var(--navy);
  font-size: 24px;
  cursor: pointer;
}

@media (max-width: 1100px) {
  .nav__links,
  .nav__cta {
    display: none;
  }
  .nav__toggle {
    display: block;
  }
  .nav__links.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--cream);
    padding: 32px var(--gutter);
    gap: 24px;
    border-bottom: 1px solid var(--ash);
  }
}

/* ============================================
   HERO
   ============================================ */

.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  position: relative;
  overflow: hidden;
  background: var(--cream);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(201, 169, 97, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(26, 40, 73, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  max-width: 880px;
}

.hero h1 {
  margin-bottom: 32px;
}

.hero .subheadline {
  font-size: clamp(18px, 1.5vw, 22px);
  color: var(--slate);
  line-height: 1.55;
  max-width: 56ch;
  margin-bottom: 56px;
}

.hero__cta {
  display: flex;
  gap: 32px;
  align-items: center;
  flex-wrap: wrap;
}

/* ============================================
   BUTTONS / LINKS
   ============================================ */

.btn {
  display: inline-block;
  padding: 16px 32px;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--navy);
  color: var(--navy);
  transition: background 300ms ease, color 300ms ease;
  cursor: pointer;
  background: transparent;
  font-weight: 500;
  font-family: var(--sans);
}

.btn:hover {
  background: var(--navy);
  color: var(--cream);
}

.section--navy .btn {
  border-color: var(--gold);
  color: var(--gold);
}

.section--navy .btn:hover {
  background: var(--gold);
  color: var(--navy);
}

.link-arrow {
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.link-arrow::after {
  content: '\2192';
  transition: transform 300ms ease;
}

.link-arrow:hover {
  color: var(--gold);
}

.link-arrow:hover::after {
  transform: translateX(6px);
}

.section--navy .link-arrow {
  color: var(--cream);
}

.section--navy .link-arrow:hover {
  color: var(--gold);
}

/* ============================================
   CAPABILITY CARDS
   ============================================ */

.cap-card {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.cap-card__num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.cap-card__title {
  font-family: var(--serif);
  font-size: clamp(24px, 2.2vw, 32px);
  line-height: 1.2;
  color: var(--navy);
}

.cap-card__desc {
  color: var(--slate);
  line-height: 1.65;
  flex: 1;
}

/* ============================================
   PROCESS STRIP
   ============================================ */

.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--ash);
  border-top: 1px solid var(--ash);
  border-bottom: 1px solid var(--ash);
  margin: 64px 0;
}

.process__step {
  background: var(--cream);
  padding: 48px 32px;
}

.section--bone .process__step,
.section--navy .process__step {
  background: var(--bone);
}

.section--navy .process {
  background: var(--navy-soft);
  border-color: var(--navy-soft);
}

.section--navy .process__step {
  background: var(--navy);
}

.process__step .numeral {
  display: block;
  margin-bottom: 16px;
}

.process__step h4 {
  color: var(--navy);
  margin-bottom: 8px;
}

.section--navy .process__step h4 {
  color: var(--cream);
}

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

/* ============================================
   PILLARS
   ============================================ */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 80px;
}

.pillar {
  padding: 40px;
  border-left: 1px solid var(--ash);
  text-align: left;
}

.pillar:first-child {
  border-left: none;
  padding-left: 0;
}

.pillar h4 {
  color: var(--gold);
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 400;
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}

@media (max-width: 900px) {
  .pillars {
    grid-template-columns: 1fr;
  }
  .pillar {
    border-left: none;
    border-top: 1px solid var(--ash);
    padding: 32px 0;
  }
  .pillar:first-child {
    border-top: none;
    padding-top: 0;
  }
}

/* ============================================
   CAPABILITY LIST (solutions detail)
   ============================================ */

.cap-list {
  list-style: none;
  margin-top: 64px;
}

.cap-list li {
  padding: 36px 0;
  border-top: 1px solid var(--ash);
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: baseline;
}

.cap-list li:last-child {
  border-bottom: 1px solid var(--ash);
}

.cap-list strong {
  font-family: var(--serif);
  font-size: clamp(20px, 1.8vw, 24px);
  font-weight: 400;
  color: var(--navy);
  letter-spacing: 0.005em;
}

.cap-list p {
  color: var(--slate);
  margin: 0;
}

@media (max-width: 768px) {
  .cap-list li {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ============================================
   APPROACH STAGES
   ============================================ */

.stage {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 48px;
  padding: 64px 0;
  border-top: 1px solid var(--ash);
  align-items: baseline;
}

.stage:last-child {
  border-bottom: 1px solid var(--ash);
}

.stage__num {
  font-family: var(--serif);
  font-size: clamp(48px, 5vw, 80px);
  color: var(--gold);
  line-height: 1;
}

.stage__body h3 {
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  .stage {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ============================================
   FORM
   ============================================ */

.form {
  max-width: 640px;
  margin-top: 64px;
}

.form__row {
  margin-bottom: 32px;
}

.form label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 12px;
}

.form input,
.form select,
.form textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--ash);
  padding: 12px 0;
  color: var(--navy);
  font-family: var(--sans);
  font-size: 16px;
  transition: border-color 300ms ease;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--gold);
}

.form select {
  appearance: none;
  -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--gold) 50%),
                    linear-gradient(135deg, var(--gold) 50%, transparent 50%);
  background-position: calc(100% - 18px) center, calc(100% - 12px) center;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  cursor: pointer;
}

.form select option {
  background: var(--cream);
  color: var(--navy);
}

.form textarea {
  min-height: 140px;
  resize: vertical;
  border: 1px solid var(--ash);
  padding: 16px;
}

.form__check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 20px;
}

.form__check input[type="checkbox"] {
  width: auto;
  margin-top: 4px;
  accent-color: var(--gold);
}

.form__check label {
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--slate);
  margin: 0;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--navy);
  color: var(--cream);
  padding: 96px 0 32px;
  border-top: 4px solid var(--gold);
}

.footer .container {
  max-width: var(--max-width);
}

.footer__top {
  text-align: center;
  padding-bottom: 64px;
  border-bottom: 1px solid rgba(245, 241, 232, 0.15);
}

.footer__top .logo {
  justify-content: center;
  margin-bottom: 24px;
}

.footer__top .logo img {
  height: 80px;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.footer__tagline {
  font-family: var(--serif);
  font-style: italic;
  color: rgba(245, 241, 232, 0.7);
  font-size: 18px;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
  padding: 64px 0;
  border-bottom: 1px solid rgba(245, 241, 232, 0.15);
}

.footer__col h5 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 24px;
}

.footer__col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__col a {
  color: rgba(245, 241, 232, 0.65);
  font-size: 14px;
  letter-spacing: 0.01em;
}

.footer__col a:hover {
  color: var(--gold);
}

.footer__legal {
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: rgba(245, 241, 232, 0.5);
  letter-spacing: 0.04em;
}

.footer__legal__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer__legal__links a {
  color: rgba(245, 241, 232, 0.5);
}

.footer__legal__links a:hover {
  color: var(--gold);
}

@media (max-width: 900px) {
  .footer__cols {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer__legal {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .footer__cols {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   CLOSING DISCLAIMER
   ============================================ */

.disclaimer {
  font-size: 13px;
  color: var(--slate);
  line-height: 1.7;
  max-width: 80ch;
  border-top: 1px solid var(--ash);
  padding-top: 32px;
  margin-top: 64px;
  font-style: italic;
}

/* ============================================
   PAGE HERO (interior pages)
   ============================================ */

.page-hero {
  padding: 220px 0 var(--section-y);
  border-bottom: 1px solid var(--ash);
  background: var(--cream);
}

.page-hero h1 {
  max-width: 18ch;
  margin-bottom: 32px;
}

.page-hero .lead {
  margin-bottom: 0;
}

/* ============================================
   FADE-UP ON SCROLL
   ============================================ */

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 800ms ease, transform 800ms ease;
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ============================================
   UTILITY
   ============================================ */

.mt-md { margin-top: 32px; }
.mt-lg { margin-top: 64px; }
.mt-xl { margin-top: 96px; }
.text-navy { color: var(--navy) !important; }
.text-gold { color: var(--gold) !important; }