/* =========================================================
   Nathala Private Limited — Shared Stylesheet
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --ink: #0F1F3D;
  --ink-deep: #081326;
  --gold: #B08D3E;
  --gold-light: #D8B863;
  --plaster: #F4F1E8;
  --plaster-2: #EAE5D6;
  --slate: #22283A;
  --mist: #7C8798;
  --white: #FFFFFF;
  --line: rgba(15,31,61,0.14);
  --line-light: rgba(244,241,232,0.22);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --transition-base: 0.3s var(--ease-out-quart);
  --shadow-sm: 0 1px 2px rgba(15,31,61,0.06);
  --shadow-md: 0 4px 16px rgba(15,31,61,0.08);
  --shadow-lg: 0 12px 40px rgba(15,31,61,0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--plaster);
  color: var(--slate);
  font-family: 'IBM Plex Sans', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
  letter-spacing: -0.01em;
}

p { margin: 0; line-height: 1.7; }
a { color: inherit; text-decoration: none; }

.mono {
  font-family: 'IBM Plex Mono', monospace;
  letter-spacing: 0.04em;
}

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 40px;
}

@media (max-width: 640px) {
  .wrap { padding: 0 22px; }
}

/* ---------- FADE-IN ANIMATION ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- NAV ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244,241,232,0.88);
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s ease;
}

header.scrolled {
  box-shadow: var(--shadow-md);
}

nav.wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: opacity var(--transition-base);
}
.brand:hover { opacity: 0.8; }

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--ink);
  border: 1.5px solid var(--gold);
  position: relative;
  flex: none;
  transition: transform var(--transition-base), border-color var(--transition-base);
}
.brand:hover .brand-mark {
  transform: scale(1.06);
  border-color: var(--gold-light);
}

.brand-mark svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.brand-name {
  font-family: 'Fraunces', serif;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  line-height: 1.1;
}
.brand-name span {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 400;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--mist);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 0.88rem;
  color: var(--slate);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-base);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transition: width 0.35s var(--ease-out-expo);
  border-radius: 1px;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active {
  color: var(--ink);
  font-weight: 500;
}
.nav-links a.active::after { width: 100%; }

.nav-cta {
  border: 1.5px solid var(--ink);
  padding: 10px 22px;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 4px;
  transition: all var(--transition-base);
}
.nav-cta:hover {
  background: var(--ink);
  color: var(--plaster);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Hamburger toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.3s ease;
}

@media (max-width: 860px) {
  .nav-links,
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    background: rgba(244,241,232,0.97);
    backdrop-filter: blur(18px);
    padding: 24px 40px 32px;
    gap: 20px;
    border-bottom: 1px solid var(--line);
    animation: slideDown 0.35s var(--ease-out-expo);
  }
  .nav-cta.open {
    display: inline-flex;
    position: absolute;
    top: calc(78px + var(--mobile-nav-height, 240px));
  }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  background: var(--ink);
  color: var(--plaster);
  overflow: hidden;
  padding: 96px 0 0;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(680px 460px at 82% 8%, rgba(176,141,62,0.20), transparent 60%),
    radial-gradient(400px 300px at 15% 90%, rgba(176,141,62,0.08), transparent 50%),
    repeating-linear-gradient(115deg, rgba(244,241,232,0.03) 0px, rgba(244,241,232,0.03) 1px, transparent 1px, transparent 64px);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  padding-bottom: 70px;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: left; }
}
.hero h1 {
  color: var(--plaster);
  font-size: clamp(2.5rem, 4.4vw, 4rem);
  line-height: 1.06;
  max-width: 14ch;
  animation: heroFadeIn 0.9s var(--ease-out-expo) both;
}
.hero h1 em {
  font-style: italic;
  color: var(--gold-light);
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-sub {
  margin-top: 26px;
  max-width: 46ch;
  font-size: 1.06rem;
  color: rgba(244,241,232,0.78);
  animation: heroFadeIn 0.9s var(--ease-out-expo) 0.15s both;
}
.hero-actions {
  margin-top: 36px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: heroFadeIn 0.9s var(--ease-out-expo) 0.3s both;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--ink-deep);
  padding: 14px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(176,141,62,0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(176,141,62,0.35);
}

.btn-ghost {
  border: 1.5px solid rgba(244,241,232,0.35);
  color: var(--plaster);
  padding: 14px 28px;
  font-size: 0.9rem;
  border-radius: 4px;
  transition: all var(--transition-base);
}
.btn-ghost:hover {
  border-color: var(--gold-light);
  background: rgba(244,241,232,0.06);
  transform: translateY(-1px);
}

.seal-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.seal-wrap svg {
  width: min(360px, 82vw);
  height: auto;
  filter: drop-shadow(0 18px 40px rgba(0,0,0,0.35));
  animation: seal-in 1.1s cubic-bezier(.16,.9,.28,1) both;
}
@keyframes seal-in {
  from { opacity: 0; transform: scale(.92) rotate(-6deg); }
  to { opacity: 1; transform: scale(1) rotate(0deg); }
}
.seal-ring {
  animation: spin 90s linear infinite;
  transform-origin: 200px 200px;
}
@media (prefers-reduced-motion: reduce) {
  .seal-ring { animation: none; }
  .seal-wrap svg { animation: none; }
  .fade-in { transition: none; opacity: 1; transform: none; }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* certificate strip */
.cert-strip {
  position: relative;
  border-top: 1px solid var(--line-light);
  background: var(--ink-deep);
}
.cert-strip .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.cert-item {
  padding: 22px 28px;
  border-right: 1px solid var(--line-light);
  transition: background var(--transition-base);
}
.cert-item:hover { background: rgba(244,241,232,0.03); }
.cert-item:last-child { border-right: none; }
.cert-item .label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-light);
  margin-bottom: 6px;
  display: block;
}
.cert-item .value {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.86rem;
  color: rgba(244,241,232,0.9);
}
@media (max-width: 860px) {
  .cert-strip .wrap { grid-template-columns: 1fr 1fr; }
  .cert-item { border-bottom: 1px solid var(--line-light); }
}
@media (max-width: 500px) {
  .cert-strip .wrap { grid-template-columns: 1fr; }
}

/* ---------- SECTION HEADS ---------- */
section { padding: 110px 0; }
.section-head {
  max-width: 640px;
  margin-bottom: 64px;
}
.section-head h2 {
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  margin-top: 14px;
  line-height: 1.15;
}
.section-head p {
  margin-top: 18px;
  color: var(--mist);
  font-size: 1.02rem;
  max-width: 56ch;
}

/* ---------- SERVICES ---------- */
.services { background: var(--white); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
@media (max-width: 900px) {
  .service-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 600px) {
  .service-grid { grid-template-columns: 1fr; }
}
.service-card {
  padding: 38px 34px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: all var(--transition-base);
  position: relative;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transition: width 0.5s var(--ease-out-expo);
}
.service-card:hover {
  background: var(--plaster);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  z-index: 1;
}
.service-card:hover::before { width: 100%; }

.service-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--gold);
  letter-spacing: 0.1em;
}
.service-card h3 {
  font-size: 1.18rem;
  margin-top: 18px;
  line-height: 1.3;
}
.service-card p {
  margin-top: 12px;
  color: var(--mist);
  font-size: 0.92rem;
}

/* ---------- APPROACH ---------- */
.approach {
  background: var(--ink);
  color: var(--plaster);
  position: relative;
  overflow: hidden;
}
.approach::before {
  content: "";
  position: absolute;
  left: -200px;
  top: -200px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  border: 1px solid rgba(176,141,62,0.12);
  pointer-events: none;
}
.approach .eyebrow { color: var(--gold-light); }
.approach .section-head h2 { color: var(--plaster); }
.approach .section-head p { color: rgba(244,241,232,0.68); }

.pillars {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}
@media (max-width: 800px) {
  .pillars { grid-template-columns: 1fr; }
}
.pillar {
  background: var(--ink);
  padding: 36px 32px;
  transition: all var(--transition-base);
}
.pillar:hover {
  background: rgba(15,31,61,0.85);
}
.pillar .mark {
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Fraunces', serif;
  color: var(--gold-light);
  font-size: 1rem;
  transition: all var(--transition-base);
}
.pillar:hover .mark {
  background: rgba(176,141,62,0.12);
  transform: scale(1.08);
}
.pillar h3 {
  color: var(--plaster);
  font-size: 1.08rem;
  margin-top: 22px;
}
.pillar p {
  margin-top: 12px;
  color: rgba(244,241,232,0.65);
  font-size: 0.92rem;
}

/* ---------- ABOUT ---------- */
.about { background: var(--plaster-2); }
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: start;
}
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
}
.about-copy p {
  color: var(--slate);
  font-size: 1.02rem;
  margin-bottom: 18px;
}
.about-copy p + p { color: var(--mist); font-size: 0.96rem; }

.ledger {
  border-top: 1px solid var(--line);
}
.ledger-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  transition: all var(--transition-base);
}
.ledger-row:hover {
  padding-left: 8px;
  background: rgba(15,31,61,0.02);
}
.ledger-row .k { color: var(--mist); }
.ledger-row .v {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ink);
  text-align: right;
}

/* ---------- CONTACT / FOOTER ---------- */
.contact {
  background: var(--ink-deep);
  color: var(--plaster);
  position: relative;
  overflow: hidden;
}
.contact::before {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(176,141,62,0.25);
  animation: pulse-ring 8s ease-in-out infinite;
}
@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.7; }
}
.contact::after {
  content: "";
  position: absolute;
  left: -200px;
  bottom: -200px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  border: 1px solid rgba(176,141,62,0.10);
  pointer-events: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  position: relative;
}
@media (max-width: 800px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact h2 {
  color: var(--plaster);
  font-size: clamp(1.9rem,3.2vw,2.6rem);
  max-width: 14ch;
  line-height: 1.15;
}
.contact-copy {
  margin-top: 20px;
  color: rgba(244,241,232,0.68);
  max-width: 44ch;
}
.contact-actions {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.contact-block { margin-bottom: 26px; }
.contact-block .label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-light);
  display: block;
  margin-bottom: 8px;
}
.contact-block .val { font-size: 1.02rem; }
.contact-block a.val {
  transition: color var(--transition-base);
  position: relative;
}
.contact-block a.val::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--gold-light);
  transition: width 0.3s var(--ease-out-expo);
}
.contact-block a.val:hover { color: var(--gold-light); }
.contact-block a.val:hover::after { width: 100%; }

footer {
  border-top: 1px solid var(--line-light);
  padding: 26px 0;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: rgba(244,241,232,0.5);
}
.footer-row .mono { color: rgba(244,241,232,0.5); }

.footer-nav {
  display: flex;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-nav a {
  font-size: 0.78rem;
  color: rgba(244,241,232,0.5);
  transition: color var(--transition-base);
}
.footer-nav a:hover { color: var(--gold-light); }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- PAGE TRANSITION ---------- */
.page-content {
  animation: pageIn 0.5s var(--ease-out-expo) both;
}
@keyframes pageIn {
  from { opacity: 0; }
  to { opacity: 1; }
}