/* image4D — main stylesheet
   Style: dark + Garamond + global noise overlay
   Aligned with the existing image4d.fr aesthetic
*/

:root {
  --bg-dark: #0e0e0e;
  --bg-dark-soft: #161616;
  --bg-cream: #f0ece4;
  --bg-cream-soft: #e8e3d8;
  --text-primary: #d4d3cf;
  --text-bright: #f0ece4;
  --text-muted: #9a9890;
  --text-dim: #6b6963;
  --text-faint: #4a4840;
  --text-on-cream: #2a2a2a;
  --text-on-cream-muted: #6b6963;
  --border-dark: #222;
  --border-dark-strong: #3a3a3a;
  --border-on-cream: rgba(0, 0, 0, 0.1);
  --accent: #a09e98;
  --max-width: 1080px;
  --content-padding: 2.5rem;
  --radius: 6px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: 'EB Garamond', 'Garamond', 'Georgia', serif;
  font-size: 18px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.25s ease, color 0.25s ease;
}

a:hover { opacity: 0.7; }

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

/* ============================================
   GLOBAL NOISE OVERLAY
   Applied across the whole page (matches existing site)
   ============================================ */

.noise {
  position: fixed;
  inset: 0;
  z-index: 100;
  background-image: url('../img/noise.gif');
  background-size: auto;
  opacity: 0.108;
  pointer-events: none;
}

/* Light section noise — discreet, layered locally */
.section--cream .noise-local,
.section--white .noise-local,
.cream-block .noise-local {
  position: absolute;
  inset: 0;
  background-image: url('../img/noise.gif');
  background-size: auto;
  opacity: 0.05;
  pointer-events: none;
  mix-blend-mode: multiply;
}

/* ============================================
   NAVBAR
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2.5rem;
  background: rgba(14, 14, 14, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav-left {
  display: flex;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-primary);
}

.nav-logo svg { display: block; flex-shrink: 0; }

.nav-logo__accent {
  color: var(--text-bright);
  font-weight: 600;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-right a {
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.nav-right a.active {
  color: var(--text-bright);
}

@media (max-width: 768px) {
  .navbar { padding: 1rem 1.2rem; }
  .nav-right { gap: 1rem; }
  .nav-right a { font-size: 0.9rem; }
}

/* ============================================
   HERO (home)
   ============================================ */

.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 92vh;
  text-align: center;
  padding: 6rem 2rem 4rem;
  position: relative;
}

.hero-content { max-width: 960px; width: 100%; }

.title-main {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 0.4em;
  user-select: none;
}

.title-main .letter {
  display: inline-block;
  transform: translateY(45%);
  opacity: 0;
  transition: transform 0.5s ease-out, opacity 0.5s ease-out;
}

.title-main .letter.visible {
  transform: translateY(0);
  opacity: 1;
}

.acronym-line {
  font-size: clamp(1.1rem, 2.4vw, 1.65rem);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  user-select: none;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.acronym-line.visible { opacity: 1; transform: translateY(0); }
.acronym-line .hi { color: var(--text-bright); font-weight: 600; }
.acronym-line .lo { color: var(--accent); font-weight: 400; }

.hero-tagline {
  font-size: clamp(1rem, 1.8vw, 1.3rem);
  font-weight: 400;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  margin-top: 1.8rem;
  font-style: italic;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.hero-tagline.visible { opacity: 1; }

.themes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem 2.2rem;
  margin-top: 2.8rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 1s ease, transform 1s ease;
}

.themes.visible { opacity: 1; transform: translateY(0); }

.themes a {
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  color: var(--text-dim);
  letter-spacing: 0.04em;
  position: relative;
  transition: color 0.3s ease;
}

.themes a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.themes a:hover { color: var(--text-primary); opacity: 1; }
.themes a:hover::after { width: 100%; }
.themes .sep { color: #3a3a3a; user-select: none; }

/* ============================================
   PAGE LAYOUT (capability, approach, partners, contact)
   ============================================ */

.page {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 7rem 2.5rem 4rem;
}

.page-header {
  text-align: center;
  margin-bottom: 4rem;
}

.page-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.page-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 400;
  color: var(--text-bright);
  letter-spacing: -0.01em;
  margin-bottom: 0.4em;
  line-height: 1.15;
}

.page-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--text-muted);
  letter-spacing: 0.02em;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.55;
  font-style: italic;
}

.page-lead {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  color: var(--text-primary);
  line-height: 1.7;
  max-width: 720px;
  margin: 1.5rem auto 0;
}

/* ============================================
   SECTION TITLES
   ============================================ */

.section {
  margin-bottom: 4rem;
  position: relative;
}

.section-title {
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-dark);
}

/* ============================================
   CAPABILITY CARDS (home grid)
   ============================================ */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.4rem;
}

.cap-card {
  background: var(--bg-dark-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 1.8rem 2rem;
  display: block;
  transition: border-color 0.3s ease, transform 0.3s ease;
  color: var(--text-primary);
}

.cap-card:hover {
  border-color: var(--border-dark-strong);
  transform: translateY(-2px);
  opacity: 1;
}

.cap-card__head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.6rem;
}

.cap-card__icon { color: var(--text-muted); flex-shrink: 0; }

.cap-card__title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-bright);
}

.cap-card__desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.cap-card__more {
  display: inline-block;
  margin-top: 0.8rem;
  font-size: 0.9rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  font-style: italic;
}

@media (max-width: 700px) {
  .cap-grid { grid-template-columns: 1fr; }
}

/* ============================================
   "TWO DOMAINS" SECTION
   ============================================ */

.two-domains {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.two-domains p {
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 1rem;
}

.two-domains__intro { color: var(--text-primary); }
.two-domains__sub { color: var(--text-muted); }

.two-domains__cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.domain-card {
  padding: 1.4rem 1.4rem;
  background: var(--bg-dark-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
}

.domain-card__label {
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.domain-card__text {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .two-domains { grid-template-columns: 1fr; }
}

/* ============================================
   CAPABILITY PAGE — sections on cream/light bg
   ============================================ */

.cream-block {
  background: var(--bg-cream);
  color: var(--text-on-cream);
  margin: 4rem -2.5rem;
  padding: 4rem 2.5rem;
  position: relative;
  overflow: hidden;
}

.cream-block__inner {
  max-width: 100%;
  position: relative;
  z-index: 2;
}

.cream-block .section-title {
  color: var(--text-on-cream-muted);
  border-bottom-color: var(--border-on-cream);
}

@media (max-width: 768px) {
  .cream-block { margin: 3rem -1.2rem; padding: 3rem 1.2rem; }
}

/* ============================================
   "WHAT WE DO" — 2x2 grid
   ============================================ */

.what-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 3rem;
}

.what-item__title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-on-cream);
}

.what-item__desc {
  font-size: 1rem;
  color: var(--text-on-cream-muted);
  line-height: 1.75;
}

@media (max-width: 700px) {
  .what-grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* ============================================
   METHOD — 4 step grid (on cream)
   ============================================ */

.method-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.method-step {
  background: var(--bg-cream-soft);
  border: 1px solid var(--border-on-cream);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
}

.method-step__num {
  font-size: 0.85rem;
  color: var(--text-on-cream-muted);
  font-weight: 600;
  margin-bottom: 0.6rem;
  letter-spacing: 0.1em;
  font-style: italic;
}

.method-step__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-on-cream);
}

.method-step__desc {
  font-size: 0.95rem;
  color: var(--text-on-cream-muted);
  line-height: 1.65;
}

@media (max-width: 900px) { .method-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .method-grid { grid-template-columns: 1fr; } }

/* ============================================
   APPLICATIONS — 3-col bullet list
   ============================================ */

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.app-item {
  border-left: 2px solid var(--accent);
  padding: 0.4rem 1.2rem;
}

.app-item__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-bright);
}

.app-item__desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

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

/* ============================================
   APPROACH — phases (dark)
   ============================================ */

.phase {
  display: grid;
  grid-template-columns: 90px 1fr 130px;
  gap: 1.5rem;
  padding: 1.6rem 1.8rem;
  background: var(--bg-dark-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  margin-bottom: 0.8rem;
  align-items: start;
}

.phase__label {
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.phase__num {
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text-bright);
  margin-top: 0.3rem;
}

.phase__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-bright);
}

.phase__desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.phase__duration {
  text-align: right;
  font-size: 0.9rem;
  color: var(--text-dim);
  padding-top: 1.4rem;
  letter-spacing: 0.04em;
  font-style: italic;
}

@media (max-width: 768px) {
  .phase {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1.4rem;
  }
  .phase__duration { text-align: left; padding-top: 0.4rem; }
}

/* ============================================
   PRINCIPLES (3-col, dark)
   ============================================ */

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.principle__title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-bright);
}

.principle__desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

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

/* ============================================
   CTA STRIP (dark)
   ============================================ */

.cta-strip {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
  padding: 1.8rem 2rem;
  background: var(--bg-dark-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
}

.cta-strip__title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 0.3rem;
}

.cta-strip__sub {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.btn--primary {
  background: var(--text-bright);
  color: var(--bg-dark);
  border-color: var(--text-bright);
}

.btn--primary:hover {
  background: transparent;
  color: var(--text-bright);
  opacity: 1;
}

.btn--ghost {
  background: transparent;
  color: var(--text-bright);
  border-color: var(--border-dark-strong);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  opacity: 1;
}

.btn--dark {
  background: var(--bg-dark);
  color: var(--text-bright);
  border-color: var(--text-bright);
}

@media (max-width: 700px) {
  .cta-strip { grid-template-columns: 1fr; padding: 1.5rem; }
}

/* ============================================
   PARTNERS PAGE
   ============================================ */

.partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
}

.partner-card {
  background: var(--bg-dark-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 1.8rem 2rem;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.partner-card:hover {
  border-color: var(--border-dark-strong);
  transform: translateY(-2px);
}

.partner-name {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 0.2rem;
}

.partner-role {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
  font-style: italic;
}

.partner-affiliation {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 0.8rem;
}

.partner-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.partner-links {
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.partner-links a {
  font-size: 0.85rem;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-dark-strong);
  padding-bottom: 1px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.partner-links a:hover {
  color: var(--text-bright);
  border-color: var(--text-bright);
  opacity: 1;
}

/* ============================================
   CONTACT
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-form {
  display: grid;
  gap: 1.2rem;
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form-row label {
  font-size: 0.9rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.form-row input,
.form-row textarea,
.form-row select {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.7rem 0.9rem;
  background: var(--bg-dark-soft);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.25s ease;
}

.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  border-color: var(--accent);
}

.form-row textarea {
  resize: vertical;
  min-height: 130px;
  font-family: inherit;
}

.contact-info {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.85;
}

.contact-info p { margin-bottom: 1.1rem; }

.contact-info strong {
  color: var(--text-bright);
  font-weight: 600;
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
}

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

.footer-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  padding: 2rem 0 3rem;
  border-top: 1px solid #1e1e1e;
  margin-top: 3rem;
}

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

.spacer-md { height: 3rem; }
.spacer-lg { height: 5rem; }

/* ============================================
   LANGUAGE SWITCHER (top-right of navbar)
   ============================================ */

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-left: 1.5rem;
  padding-left: 1.5rem;
  border-left: 1px solid #2a2a2a;
}

.lang-switch a {
  color: var(--text-dim);
  text-transform: uppercase;
  transition: color 0.25s ease;
  font-weight: 400;
}

.lang-switch a.active {
  color: var(--text-bright);
  font-weight: 500;
}

.lang-switch a:hover {
  color: var(--text-primary);
  opacity: 1;
}

.lang-switch__sep {
  color: #2a2a2a;
  user-select: none;
}

@media (max-width: 768px) {
  .lang-switch {
    gap: 0.4rem;
    margin-left: 0.8rem;
    padding-left: 0.8rem;
    font-size: 0.8rem;
  }
}