/* ============================================================
   RHEMA — landing page styles
   Brand: deep navy + light grey, bold geometric sans + italic serif
   Theme-aware: [data-theme="dark"] (default) and [data-theme="light"]
   ============================================================ */

:root {
  /* Brand constants (theme-independent) */
  --navy-900: #061a36;
  --navy-800: #0b2547;
  --navy-700: #102f59;
  --navy-600: #16407a;
  --navy-500: #1d57a4;
  --navy-accent: #4d8be6;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --font-sans: 'Outfit', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- DARK THEME (default) ---------- */
:root,
[data-theme="dark"] {
  --bg:            #061a36;
  --bg-alt:        #0a2342;
  --surface:       rgba(255, 255, 255, .04);
  --surface-hover: rgba(77, 139, 230, .08);
  --border:        rgba(255, 255, 255, .1);
  --border-soft:   rgba(255, 255, 255, .06);

  --text:        #e7e9ed;
  --text-soft:   #aab1bb;
  --heading:     #ffffff;
  --heading-g1:  #ffffff;
  --heading-g2:  #cdd2d8;

  --accent:      #4d8be6;
  --accent-deep: #1d57a4;
  --accent-soft: #a4c3ec;
  --label:       #4d8be6;

  --nav-bg:          rgba(6, 26, 54, .55);
  --nav-bg-scrolled: rgba(6, 26, 54, .85);

  --tile-bg:     #ffffff;     /* logo tiles always light so logos read */
  --tile-border: rgba(255, 255, 255, .1);

  --watermark:   rgba(255, 255, 255, .03);
  --orb-opacity: .55;
  --shadow-lg: 0 30px 80px -20px rgba(0, 0, 0, .5);
  --shadow-md: 0 12px 40px -16px rgba(0, 0, 0, .45);
}

/* ---------- LIGHT THEME ---------- */
[data-theme="light"] {
  --bg:            #ffffff;
  --bg-alt:        #eef1f6;
  --surface:       #ffffff;
  --surface-hover: #f4f7fc;
  --border:        rgba(13, 47, 89, .12);
  --border-soft:   rgba(13, 47, 89, .08);

  --text:        #36465e;
  --text-soft:   #5a6573;
  --heading:     #0b2547;
  --heading-g1:  #0b2547;
  --heading-g2:  #1d57a4;

  --accent:      #1657a8;
  --accent-deep: #16407a;
  --accent-soft: #1d57a4;
  --label:       #16407a;

  --nav-bg:          rgba(255, 255, 255, .72);
  --nav-bg-scrolled: rgba(255, 255, 255, .92);

  --tile-bg:     #ffffff;
  --tile-border: rgba(13, 47, 89, .1);

  --watermark:   rgba(13, 47, 89, .045);
  --orb-opacity: .20;
  --shadow-lg: 0 30px 80px -24px rgba(13, 47, 89, .25);
  --shadow-md: 0 14px 40px -18px rgba(13, 47, 89, .22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  overflow-x: hidden;
  font-feature-settings: 'ss01';
  transition: background .4s var(--ease), color .4s var(--ease);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
em { font-family: var(--font-serif); font-style: italic; font-weight: 600; }

.container { width: min(1180px, 92vw); margin: 0 auto; }

/* Section backgrounds (alternating, theme-driven) */
.section-bg     { background: var(--bg); }
.section-bg-alt { background: var(--bg-alt); }

/* ---------- Background orbs ---------- */
.bg-orbs { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.orb {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: var(--orb-opacity);
  will-change: transform;
  transition: opacity .4s var(--ease);
}
.orb-1 { background: radial-gradient(circle, #1d57a4 0%, transparent 60%); top: -200px; left: -150px; animation: float 18s ease-in-out infinite; }
.orb-2 { background: radial-gradient(circle, #4d8be6 0%, transparent 60%); top: 40%; right: -200px; animation: float 22s ease-in-out infinite reverse; }
.orb-3 { background: radial-gradient(circle, #102f59 0%, transparent 60%); bottom: -200px; left: 30%; animation: float 26s ease-in-out infinite; }

@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  50%      { transform: translate(60px,-40px) scale(1.08); }
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 18px 0;
  backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border-soft);
  transition: padding .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled { padding: 12px 0; background: var(--nav-bg-scrolled); }
.nav-inner {
  width: min(1180px, 92vw);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { width: 36px; height: 36px; }
.brand-word { font-weight: 800; letter-spacing: .12em; font-size: 1.05rem; color: var(--heading); }
.nav-links {
  display: flex; align-items: center; gap: 26px;
  font-size: .95rem; font-weight: 500;
}
.nav-links > a:not(.btn) { position: relative; padding: 6px 0; color: var(--text); }
.nav-links > a:not(.btn)::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: var(--accent); transition: right .35s var(--ease);
}
.nav-links > a:not(.btn):hover { color: var(--heading); }
.nav-links > a:not(.btn):hover::after { right: 0; }

.nav-controls { display: inline-flex; align-items: center; gap: 14px; }

/* Language switch */
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.lang-switch button {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--text-soft);
  font: inherit;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 6px 11px;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.lang-switch button.active {
  background: var(--accent);
  color: #fff;
}
.lang-switch button:not(.active):hover { color: var(--heading); }

/* Theme toggle */
.theme-toggle {
  position: relative;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.theme-toggle:hover { border-color: var(--accent); background: var(--surface-hover); }
.theme-sun, .theme-moon {
  position: absolute;
  width: 18px; height: 18px;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
/* Sun */
.theme-sun {
  border-radius: 50%;
  background: radial-gradient(circle, #ffd479 38%, transparent 40%);
  box-shadow:
    0 -11px 0 -8px var(--accent), 0 11px 0 -8px var(--accent),
    -11px 0 0 -8px var(--accent), 11px 0 0 -8px var(--accent),
    8px 8px 0 -8px var(--accent), -8px -8px 0 -8px var(--accent),
    8px -8px 0 -8px var(--accent), -8px 8px 0 -8px var(--accent);
}
/* Moon */
.theme-moon {
  border-radius: 50%;
  box-shadow: inset -6px -2px 0 0 var(--accent);
  transform: rotate(-20deg);
}
/* Dark theme shows moon; light theme shows sun */
[data-theme="dark"] .theme-sun  { opacity: 0; transform: scale(.4) rotate(-40deg); }
[data-theme="dark"] .theme-moon { opacity: 1; }
[data-theme="light"] .theme-sun  { opacity: 1; }
[data-theme="light"] .theme-moon { opacity: 0; transform: scale(.4) rotate(40deg); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600; font-size: .95rem; letter-spacing: .01em;
  cursor: pointer; border: 1px solid transparent;
  transition: transform .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff;
  box-shadow: 0 10px 30px -10px rgba(29, 87, 164, .55);
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); background: var(--surface-hover); }

.mobile-toggle { display: none; background: transparent; border: 0; padding: 8px; cursor: pointer; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; transition: transform .25s var(--ease), opacity .25s var(--ease); }
.mobile-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 140px 6vw 80px;
  text-align: center;
}
.hero-inner { position: relative; max-width: 980px; }
.kicker {
  text-transform: uppercase; letter-spacing: .3em;
  font-size: .82rem; color: var(--label);
  margin: 0 0 26px; font-weight: 600;
}
.hero-title {
  font-size: clamp(2.4rem, 7.5vw, 6rem);
  line-height: 1.02; letter-spacing: -.02em; font-weight: 800;
  margin: 0 0 28px;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 24px;
}
.hero-title .word {
  display: inline-block;
  background: linear-gradient(180deg, var(--heading-g1) 0%, var(--heading-g2) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-title .word.accent {
  font-family: var(--font-serif); font-style: italic; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-copy { max-width: 620px; margin: 0 auto 36px; font-size: clamp(1rem, 1.3vw, 1.18rem); color: var(--text); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.hero-mark {
  position: absolute; bottom: -120px; left: 50%; transform: translateX(-50%);
  font-size: clamp(8rem, 22vw, 18rem); font-weight: 900; letter-spacing: -.04em;
  color: var(--watermark); pointer-events: none; z-index: -1; line-height: 1;
}
.hero-scroll {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  font-size: .75rem; letter-spacing: .3em; text-transform: uppercase;
  color: var(--text-soft); display: flex; align-items: center; gap: 10px;
}
.hero-scroll em { font-family: var(--font-sans); font-style: normal; }
.hero-scroll span {
  width: 1px; height: 30px;
  background: linear-gradient(180deg, var(--accent), transparent);
  display: inline-block; animation: scroll-pulse 1.8s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0%, 100% { opacity: .3; transform: scaleY(.6); }
  50%      { opacity: 1; transform: scaleY(1); }
}

/* ---------- Sections ---------- */
.section { position: relative; z-index: 1; padding: 110px 0; }
.section-head { max-width: 760px; margin: 0 auto 64px; text-align: center; }
.section-title {
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
  line-height: 1.14; letter-spacing: -.015em; font-weight: 700;
  margin: 12px 0 0; color: var(--heading);
}
.label {
  text-transform: uppercase; letter-spacing: .25em;
  font-size: .78rem; color: var(--label); font-weight: 600; margin: 0 0 18px;
}
.section-text { font-size: 1.05rem; color: var(--text); margin: 0 0 18px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; align-items: start; }
.pillars { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 14px; }
.pillars li {
  padding: 16px 18px;
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  font-size: .98rem; color: var(--text);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.pillars li:hover { transform: translateX(4px); border-color: var(--accent); }
.pillars strong { color: var(--accent); font-weight: 700; margin-right: 6px; }

/* ---------- Units ---------- */
.units-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.unit-card {
  position: relative; padding: 36px 30px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease), box-shadow .35s var(--ease);
  overflow: hidden;
}
.unit-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at top right, rgba(77, 139, 230, .22), transparent 55%);
  opacity: 0; transition: opacity .35s var(--ease); pointer-events: none;
}
.unit-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  background: var(--surface-hover);
  box-shadow: var(--shadow-md);
}
.unit-card:hover::before { opacity: 1; }
.unit-mark { display: inline-flex; flex-direction: column; font-weight: 800; font-size: 1.1rem; letter-spacing: .1em; color: var(--heading); margin-bottom: 28px; }
.unit-mark span { font-size: .68rem; letter-spacing: .25em; color: var(--accent); font-weight: 600; margin-top: 4px; }
.unit-card h3 { font-family: var(--font-serif); font-style: italic; font-weight: 600; font-size: 2rem; margin: 0 0 12px; color: var(--heading); }
.unit-card > p { color: var(--text); font-size: .98rem; margin: 0 0 20px; }
.unit-list { list-style: none; margin: 0 0 24px; padding: 0; display: grid; gap: 8px; }
.unit-list li { position: relative; padding-left: 18px; font-size: .92rem; color: var(--text); }
.unit-list li::before { content: ''; position: absolute; left: 0; top: 10px; width: 8px; height: 1px; background: var(--accent); }
.link-arrow { color: var(--accent); font-weight: 600; font-size: .92rem; display: inline-flex; align-items: center; gap: 4px; transition: gap .25s var(--ease); }
.link-arrow:hover { gap: 10px; }

/* ---------- Work ---------- */
.work-block { padding: 40px 0; border-top: 1px solid var(--border); }
.work-block:first-of-type { border-top: 0; padding-top: 0; }
.work-eyebrow { text-transform: uppercase; letter-spacing: .22em; font-size: .76rem; color: var(--label); font-weight: 600; margin: 0 0 10px; }
.work-title { font-family: var(--font-serif); font-style: italic; font-size: clamp(1.6rem, 2.6vw, 2.2rem); font-weight: 600; margin: 0 0 14px; color: var(--heading); }
.work-copy { max-width: 720px; font-size: 1.02rem; color: var(--text); margin: 0 0 18px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 7px 14px; border-radius: 999px;
  font-size: .82rem; font-weight: 500;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border);
  transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);
}
.tag:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Clients ---------- */
.client-grid {
  list-style: none; margin: 0 auto; padding: 0;
  max-width: 1080px;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 16px;
}
.client-grid li {
  flex: 1 1 200px; max-width: 250px;
  display: flex; align-items: center; justify-content: center;
  height: 120px; padding: 24px 28px;
  border: 1px solid var(--tile-border);
  background: var(--tile-bg);
  border-radius: var(--radius-md);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.client-grid li:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
/* Light mode: white tiles on a near-white section need resting elevation. */
[data-theme="light"] .client-grid li { box-shadow: 0 2px 12px -6px rgba(13, 47, 89, .18); }
[data-theme="light"] .client-grid li:hover { box-shadow: var(--shadow-md); }
.client-grid img {
  max-width: 100%; max-height: 56px; width: auto; object-fit: contain;
  filter: grayscale(1); opacity: .72;
  transition: filter .3s var(--ease), opacity .3s var(--ease);
}
.client-grid li:hover img { filter: grayscale(0); opacity: 1; }
/* Stacked logos (emblem + wordmark + tagline) need more vertical room. */
.client-grid img.tall { max-height: 74px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.contact-card {
  padding: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
}
.contact-row { display: flex; flex-direction: column; gap: 4px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.contact-row:last-child { border-bottom: 0; }
.contact-label { text-transform: uppercase; letter-spacing: .25em; font-size: .72rem; color: var(--accent); font-weight: 600; }
.contact-value { font-size: 1.08rem; font-weight: 500; color: var(--heading); }
a.contact-row { transition: padding .2s var(--ease); }
a.contact-row:hover { padding-left: 6px; }
a.contact-row:hover .contact-value { color: var(--accent); }

/* ---------- Footer ---------- */
.footer { position: relative; z-index: 1; padding: 40px 0; border-top: 1px solid var(--border-soft); font-size: .9rem; color: var(--text-soft); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 12px; color: var(--text); }
.footer-brand .brand-mark { width: 28px; height: 28px; }
.footer-brand b { color: var(--heading); }
.footer a { color: var(--accent); }
.footer a:hover { color: var(--heading); }

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease) var(--delay, 0s), transform .8s var(--ease) var(--delay, 0s); }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .units-grid { grid-template-columns: 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .section { padding: 80px 0; }
}

@media (max-width: 760px) {
  .mobile-toggle { display: block; }
  .nav-links {
    position: fixed; inset: 64px 0 auto 0;
    flex-direction: column;
    background: var(--nav-bg-scrolled);
    backdrop-filter: blur(16px);
    padding: 24px 28px 32px;
    align-items: stretch; gap: 16px;
    transform: translateY(-115%);
    transition: transform .35s var(--ease);
    border-bottom: 1px solid var(--border-soft);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-controls { justify-content: space-between; padding-top: 4px; }
  .hero { padding-top: 120px; }
  .hero-title { gap: 8px 14px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}