/* ========================================
   COLLABORATE AND DELIVER — STYLES
   ======================================== */

:root {
  /* Palette — warm charcoal + muted teal accent */
  --color-bg: #fafaf8;
  --color-surface: #ffffff;
  --color-dark: #1a1a1a;
  --color-dark-bg: #111111;
  --color-text: #2d2d2d;
  --color-text-muted: #6b6b6b;
  --color-accent: #2a7a6e;
  --color-accent-light: #e8f4f1;
  --color-accent-hover: #1f5e54;
  --color-border: #e5e5e0;
  --color-threshold-bg: #0c1f2c;
  --color-threshold-accent: #e8c66a;

  /* Type */
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'DM Serif Display', Georgia, serif;

  /* Spacing */
  --section-padding: clamp(3rem, 5vw, 5rem);
  --container-max: 1140px;
  --container-padding: clamp(1.25rem, 4vw, 2rem);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

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

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.nav.scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(250, 250, 248, 0.95);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-logo {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  display: flex;
  gap: 0.35rem;
  align-items: baseline;
}
.logo-and {
  color: var(--color-accent);
  font-weight: 300;
  font-size: 1rem;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-dark); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}
.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-outline:hover {
  background: var(--color-accent);
  color: #fff;
}
.btn-nav {
  background: var(--color-accent);
  color: #fff !important;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
}
.btn-nav:hover {
  background: var(--color-accent-hover);
}
.btn-threshold {
  background: var(--color-threshold-accent);
  color: var(--color-threshold-bg);
  border-color: var(--color-threshold-accent);
  margin-top: 2rem;
}
.btn-threshold:hover {
  background: #d4b35a;
  border-color: #d4b35a;
}

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(72px + var(--section-padding)) 0 2rem;
  overflow: hidden;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.2;
  color: var(--color-dark);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}
.hero-accent { color: var(--color-accent); }
.hero-sub {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 2.5rem;
}
.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.hero-gradient {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 120%;
  background: radial-gradient(ellipse at center, var(--color-accent-light) 0%, transparent 70%);
  opacity: 0.5;
  z-index: 1;
  pointer-events: none;
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: var(--section-padding) 0;
}
.section-dark {
  background: var(--color-dark-bg);
  color: #fff;
}
.section-dark .section-label { color: var(--color-accent); }
.section-dark .section-title { color: #fff; }
.section-dark p { color: rgba(255,255,255,0.7); }

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.2;
  color: var(--color-dark);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}
.section-intro {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 620px;
  margin-bottom: 3rem;
}

/* ========================================
   SERVICES GRID
   ======================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.06);
}
.service-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}
.service-card h3 {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-dark);
}
.service-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   INDUSTRIES
   ======================================== */
.industries-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}
.industry-tag {
  padding: 0.6rem 1.25rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  transition: border-color 0.2s, color 0.2s;
}
.industry-tag:hover {
  border-color: var(--color-accent);
  color: #fff;
}

/* ========================================
   PRINCIPLES / HOW WE WORK
   ======================================== */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem 4rem;
  margin-top: 2rem;
}
.principle { position: relative; }
.principle-number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--color-accent-light);
  line-height: 1;
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  opacity: 0.3;
}
.principle h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-dark);
}
.principle p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ========================================
   THE NEW THRESHOLD
   ======================================== */
.section-threshold {
  background: var(--color-threshold-bg);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.section-threshold::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(232,198,106,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.section-threshold .section-label {
  color: var(--color-threshold-accent);
}
.threshold-title {
  color: #fff !important;
  font-style: italic;
}
.threshold-intro {
  font-size: 1.15rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.8);
  margin-bottom: 1rem;
}
.threshold-intro em { color: var(--color-threshold-accent); font-style: italic; }
.threshold-body {
  font-size: 1rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 2.5rem;
  max-width: 640px;
}
.threshold-body em { font-style: italic; }

.threshold-lenses { margin-bottom: 2.5rem; }
.threshold-lenses h4,
.threshold-experience h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-threshold-accent);
  margin-bottom: 1.25rem;
}

.lenses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.lens {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  background: rgba(255,255,255,0.03);
}
.lens-num {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--color-threshold-accent);
  opacity: 0.6;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}
.lens strong {
  font-size: 0.95rem;
  color: #fff;
  display: block;
  margin-bottom: 0.25rem;
}
.lens p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin: 0;
}

.threshold-experience { margin-top: 2rem; }
.threshold-experience p {
  color: rgba(255,255,255,0.65);
  margin-bottom: 1rem;
}
.threshold-experience ol {
  list-style: none;
  counter-reset: steps;
  display: grid;
  gap: 0.75rem;
}
.threshold-experience li {
  counter-increment: steps;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  padding-left: 1.5rem;
  position: relative;
}
.threshold-experience li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--color-threshold-accent);
  opacity: 0.5;
}
.threshold-experience li strong { color: #fff; }

/* ========================================
   ABOUT
   ======================================== */
.about-layout {
  max-width: 680px;
}
.about-text p {
  margin-bottom: 1rem;
  font-size: 1rem;
  color: var(--color-text-muted);
}
.about-text p:first-of-type {
  font-size: 1.1rem;
  color: var(--color-text);
}

/* ========================================
   CONTACT
   ======================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-text p {
  max-width: 440px;
}
.contact-details {
  display: grid;
  gap: 1.5rem;
}
.contact-link {
  display: block;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  transition: border-color 0.2s;
}
a.contact-link:hover { border-color: var(--color-accent); }
.contact-link-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.35rem;
}
.contact-link-value {
  display: block;
  font-size: 1rem;
  color: rgba(255,255,255,0.9);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-logo { font-weight: 600; font-size: 0.95rem; display: flex; gap: 0.3rem; align-items: baseline; }
.footer-copy { font-size: 0.8rem; color: var(--color-text-muted); }

/* ========================================
   ANIMATIONS
   ======================================== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .lenses-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: 1.5rem var(--container-padding) 2rem;
    flex-direction: column;
    gap: 1rem;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }

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

  .hero-title { font-size: clamp(2rem, 6vw, 2.8rem); }

  .footer-inner { flex-direction: column; gap: 0.75rem; text-align: center; }
}