/* =========================================================
   ISBT Noida — Commercial Property Research Hub
   Palette: Dark Navy #0A1020 · Gold #C9A84C · Off-white #E8E4D8
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --dark:         #0A1020;
  --navy:         #0F1A2E;
  --card:         #152035;
  --card-light:   #1A2840;
  --gold:         #C9A84C;
  --gold-light:   #DDB95A;
  --gold-pale:    #F5E6B8;
  --white:        #FFFFFF;
  --text:         #E8E4D8;
  --text-muted:   rgba(232,228,216,.6);
  --border:       rgba(201,168,76,.2);
  --border-subtle: rgba(255,255,255,.08);
  --shadow-lg:    0 8px 40px rgba(0,0,0,.4);
  --radius:       8px;
  --radius-lg:    16px;
  --radius-xl:    24px;
  --font:         'Poppins', system-ui, sans-serif;
  --max-w:        1160px;
  --max-w-text:   760px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--dark);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold); text-decoration: none; transition: opacity .2s; }
a:hover { opacity: .8; }

/* ── Typography ── */
h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); font-weight: 800; line-height: 1.2; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; line-height: 1.3; }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); font-weight: 600; line-height: 1.35; }
p  { margin-bottom: 1rem; color: var(--text-muted); }
p:last-child { margin-bottom: 0; }

strong { color: var(--text); font-weight: 600; }
.text-gold { color: var(--gold); }

/* ── Layout ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section    { padding: 72px 0; }
.section-sm { padding: 48px 0; }

/* ── Gold Rule ── */
.gold-rule {
  width: 48px; height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  border-radius: 2px; margin: 12px 0 20px;
}
.gold-rule.center { margin: 12px auto 20px; }

/* ── Section Eyebrow ── */
.eyebrow {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
}

/* =========================================================
   QUICK ANSWER (AI Overview / Perplexity citation target)
   ========================================================= */
.quick-answer {
  background: rgba(201,168,76,.07);
  border: 1px solid rgba(201,168,76,.25);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin: 32px 0;
}
.quick-answer p { color: var(--text); margin-bottom: .5rem; }
.quick-answer p:last-child { margin-bottom: 0; }
.quick-answer strong { color: var(--gold); }

/* =========================================================
   NAV
   ========================================================= */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,16,32,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  display: flex; align-items: center;
  justify-content: space-between;
  height: 68px; gap: 20px;
}
.nav-logo {
  display: flex; flex-direction: column; gap: 0;
  text-decoration: none; color: inherit;
}
.nav-logo .logo-main {
  font-size: 1.05rem; font-weight: 800;
  letter-spacing: .04em; text-transform: uppercase;
  color: var(--white);
}
.nav-logo .logo-main span { color: var(--gold); }
.nav-logo .logo-sub {
  font-size: .62rem; font-weight: 600;
  letter-spacing: .13em; text-transform: uppercase;
  color: var(--text-muted);
  margin-top: -1px;
}

.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  font-size: .85rem; font-weight: 500;
  color: rgba(255,255,255,.7);
  transition: color .2s;
}
.nav-links a:hover { color: var(--gold); opacity: 1; }

.nav-cta { display: flex; gap: 10px; align-items: center; }

/* Hamburger */
.nav-toggle {
  display: none; background: none; border: 1px solid var(--border-subtle);
  border-radius: var(--radius); cursor: pointer;
  padding: 8px 10px; flex-direction: column; gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: transform .3s;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  background: var(--navy);
  border-top: 1px solid var(--border-subtle);
  padding: 16px 24px 24px;
}
.mobile-nav.open { display: block; }
.mobile-nav a, .mobile-nav span {
  display: block; padding: 12px 0;
  font-size: .9rem; font-weight: 500;
  color: rgba(255,255,255,.75);
  border-bottom: 1px solid var(--border-subtle);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: var(--gold); }

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 50px;
  font-family: var(--font); font-size: .9rem; font-weight: 600;
  cursor: pointer; border: none; text-decoration: none;
  transition: transform .2s, opacity .2s, box-shadow .2s;
  white-space: nowrap;
}
.btn:hover { transform: scale(1.03); opacity: 1; }

.btn-gold {
  background: var(--gold); color: #0A1020;
  box-shadow: 0 4px 20px rgba(201,168,76,.35);
}
.btn-gold:hover { background: var(--gold-light); box-shadow: 0 6px 28px rgba(201,168,76,.5); }

.btn-outline {
  background: transparent; color: var(--gold);
  border: 1.5px solid var(--gold);
}
.btn-outline:hover { background: rgba(201,168,76,.1); }

.btn-wa {
  background: #25D366; color: #fff;
  box-shadow: 0 4px 16px rgba(37,211,102,.3);
}
.btn-wa:hover { background: #1ebe57; box-shadow: 0 6px 24px rgba(37,211,102,.45); }

.btn-sm { padding: 9px 18px; font-size: .8rem; }
.btn-lg { padding: 16px 36px; font-size: 1rem; }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  background: linear-gradient(135deg, #0A1020 0%, #0F1A2E 50%, #141e30 100%);
  padding: 80px 0 72px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 40%, rgba(201,168,76,.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(201,168,76,.04) 0%, transparent 60%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(201,168,76,.12); border: 1px solid rgba(201,168,76,.3);
  border-radius: 50px; padding: 6px 16px;
  font-size: .72rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--gold);
  margin-bottom: 20px;
}
.hero h1 { color: var(--white); margin-bottom: 8px; }
.hero h1 span { color: var(--gold); }
.hero-sub {
  font-size: 1.05rem; color: rgba(255,255,255,.7);
  margin: 16px 0 32px; max-width: 540px;
  line-height: 1.7;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Hero Card */
.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}
.hero-card-label {
  font-size: .7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .13em;
  color: var(--gold); margin-bottom: 12px;
}
.hero-card h3 { color: var(--white); margin-bottom: 8px; font-size: 1.15rem; }
.hero-card p { font-size: .88rem; margin-bottom: 20px; }
.interest-form { display: flex; flex-direction: column; gap: 12px; }
.interest-form input {
  background: rgba(255,255,255,.07); border: 1px solid var(--border-subtle);
  border-radius: var(--radius); padding: 12px 16px;
  font-family: var(--font); font-size: .88rem; color: var(--white);
  transition: border-color .2s;
  width: 100%;
}
.interest-form input::placeholder { color: var(--text-muted); }
.interest-form input:focus { outline: none; border-color: rgba(201,168,76,.5); }
.form-note { font-size: .72rem; color: var(--text-muted); text-align: center; }

/* =========================================================
   STATS BAR
   ========================================================= */
.stats-bar {
  background: var(--gold);
  padding: 20px 0;
}
.stats-bar-inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; text-align: center;
}
.stat-item {
  padding: 8px 16px;
  border-right: 1px solid rgba(10,16,32,.15);
}
.stat-item:last-child { border-right: none; }
.stat-num { font-size: 1.6rem; font-weight: 800; color: #0A1020; line-height: 1; }
.stat-lbl { font-size: .68rem; font-weight: 700; color: rgba(10,16,32,.7); text-transform: uppercase; letter-spacing: .08em; margin-top: 4px; }

/* =========================================================
   WHY ISBT NOIDA
   ========================================================= */
.why-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.why-card {
  background: var(--card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); padding: 28px 28px 24px;
  transition: border-color .3s;
}
.why-card:hover { border-color: rgba(201,168,76,.3); }
.why-num {
  font-size: 2rem; font-weight: 800; color: var(--gold);
  line-height: 1; margin-bottom: 12px;
}
.why-card h3 { color: var(--white); margin-bottom: 8px; font-size: 1.05rem; }
.why-card p { font-size: .88rem; margin-bottom: 0; }

/* =========================================================
   CONNECTIVITY
   ========================================================= */
.connectivity-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.conn-card {
  background: var(--card-light); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 24px 20px; text-align: center;
}
.conn-icon { font-size: 2rem; margin-bottom: 12px; }
.conn-card h3 { font-size: .95rem; color: var(--white); margin-bottom: 6px; }
.conn-card p { font-size: .82rem; margin-bottom: 0; }

/* =========================================================
   CATCHMENT STRIP
   ========================================================= */
.catchment-strip {
  background: rgba(201,168,76,.07);
  border: 1px solid rgba(201,168,76,.2);
  border-radius: var(--radius-xl);
  padding: 28px 32px; margin-top: 48px;
}
.catchment-inner {
  display: flex; flex-wrap: wrap;
  justify-content: center; gap: 0; text-align: center;
}
.catchment-item { padding: 8px 32px; border-right: 1px solid var(--border-subtle); }
.catchment-item:last-child { border-right: none; }
.catchment-num { font-size: 1.6rem; font-weight: 800; color: var(--gold); line-height: 1; }
.catchment-lbl { font-size: .68rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); margin-top: 4px; }

/* =========================================================
   INVESTMENT THESIS
   ========================================================= */
.thesis-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.thesis-card {
  background: var(--card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); padding: 28px;
}
.thesis-icon { font-size: 2.2rem; margin-bottom: 14px; }
.thesis-card h3 { color: var(--white); font-size: 1rem; margin-bottom: 8px; }
.thesis-card p { font-size: .85rem; margin-bottom: 0; }

/* =========================================================
   REGISTER INTEREST CTA
   ========================================================= */
.register-cta {
  background: linear-gradient(135deg, var(--navy) 0%, #162035 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px 40px; text-align: center;
}
.register-cta h2 { color: var(--white); margin-bottom: 12px; }
.register-cta p { max-width: 520px; margin: 0 auto 28px; }
.register-cta .cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }

/* =========================================================
   FAQ
   ========================================================= */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
details.faq-item {
  background: rgba(255,255,255,.03); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 20px 24px;
  cursor: pointer; transition: border-color .2s;
}
details.faq-item[open] { border-color: rgba(201,168,76,.3); }
details.faq-item summary {
  font-weight: 600; font-size: 1rem; color: var(--white);
  list-style: none; display: flex; justify-content: space-between; align-items: center;
  gap: 16px; min-height: 32px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon { color: var(--gold); font-size: 1.4rem; transition: transform .3s; flex-shrink: 0; }
details.faq-item[open] .faq-icon { transform: rotate(45deg); }
.faq-answer { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border-subtle); }
.faq-answer p { font-size: .9rem; color: var(--text-muted); margin-bottom: 0; }

/* =========================================================
   ADVISOR
   ========================================================= */
.advisor-card {
  display: flex; align-items: flex-start; gap: 28px;
  background: var(--card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); padding: 32px;
}
.advisor-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--gold); color: #0A1020;
  font-size: 1.8rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.advisor-label {
  font-size: .68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .14em; color: var(--gold); margin-bottom: 4px;
}
.advisor-name { font-size: 1.15rem; font-weight: 700; color: var(--white); margin-bottom: 2px; }
.advisor-title { font-size: .8rem; color: var(--text-muted); margin-bottom: 14px; }
.advisor-bio { font-size: .88rem; margin-bottom: 18px; }
.advisor-actions { display: flex; flex-wrap: wrap; gap: 10px; }

/* =========================================================
   PORTFOLIO STRIP
   ========================================================= */
.portfolio-strip {
  background: rgba(255,255,255,.02); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); padding: 28px 32px;
}
.portfolio-strip h3 { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; color: var(--text-muted); margin-bottom: 16px; }
.portfolio-links { display: flex; flex-wrap: wrap; gap: 12px; }
.portfolio-link {
  background: rgba(201,168,76,.08); border: 1px solid rgba(201,168,76,.2);
  border-radius: 50px; padding: 8px 18px;
  font-size: .8rem; font-weight: 600; color: var(--gold);
  transition: background .2s, border-color .2s;
}
.portfolio-link:hover { background: rgba(201,168,76,.15); border-color: rgba(201,168,76,.4); opacity: 1; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  background: #060D1A;
  border-top: 2px solid var(--gold);
  padding-top: 48px; padding-bottom: 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px; margin-bottom: 36px;
  padding-bottom: 36px; border-bottom: 1px solid var(--border-subtle);
}
.footer-brand p { font-size: .85rem; margin: 12px 0 20px; }
.footer-brand-name { font-size: 1rem; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; color: var(--white); }
.footer-brand-name span { color: var(--gold); }
.footer-brand-sub { font-size: .65rem; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; color: var(--text-muted); }
.footer-contact-links { display: flex; flex-direction: column; gap: 10px; }
.footer-contact-link {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius);
  font-size: .83rem; font-weight: 600;
  transition: opacity .2s;
}
.footer-contact-link:hover { opacity: .85; }
.footer-contact-link.wa {
  background: rgba(37,211,102,.1); border: 1px solid rgba(37,211,102,.25); color: #4ade80;
}
.footer-contact-link.call {
  background: rgba(255,255,255,.05); border: 1px solid var(--border-subtle); color: var(--text);
}

.footer-col h4 { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; color: var(--gold); margin-bottom: 16px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.footer-col ul li a {
  display: flex; align-items: center; min-height: 40px;
  font-size: .83rem; color: rgba(255,255,255,.6);
  transition: color .2s;
}
.footer-col ul li a:hover { color: var(--gold); opacity: 1; }

.footer-legal { text-align: center; }
.footer-legal p { font-size: .72rem; color: rgba(255,255,255,.4); margin-bottom: 8px; }
.footer-legal strong { color: rgba(255,255,255,.55); }
.footer-bottom {
  margin-top: 16px; padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  font-size: .75rem; color: rgba(255,255,255,.35);
}

/* =========================================================
   STICKY WHATSAPP
   ========================================================= */
.sticky-wa {
  position: fixed; bottom: 24px; right: 24px; z-index: 200;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25D366; color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,.45);
  transition: transform .2s, box-shadow .2s;
  text-decoration: none; opacity: 1;
}
.sticky-wa:hover { transform: scale(1.1); box-shadow: 0 8px 32px rgba(37,211,102,.6); opacity: 1; }
.sticky-wa svg { width: 28px; height: 28px; }

/* =========================================================
   DISCLAIMER
   ========================================================= */
.disclaimer-box {
  background: rgba(255,255,255,.02); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 20px 24px;
  margin-top: 32px;
}
.disclaimer-box p { font-size: .78rem; color: rgba(255,255,255,.4); margin-bottom: 0; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-card { max-width: 520px; }
  .connectivity-grid { grid-template-columns: repeat(2, 1fr); }
  .thesis-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .stats-bar-inner { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .why-grid { grid-template-columns: 1fr; }
  .connectivity-grid { grid-template-columns: 1fr; }
  .thesis-grid { grid-template-columns: 1fr; }
  .advisor-card { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .catchment-inner { gap: 8px 0; }
  .catchment-item { border-right: none; border-bottom: 1px solid var(--border-subtle); padding: 12px 24px; }
  .catchment-item:last-child { border-bottom: none; }
  .hero { padding: 56px 0 48px; }
}

@media (max-width: 480px) {
  .btn-lg { padding: 14px 24px; font-size: .88rem; }
  .register-cta { padding: 36px 24px; }
}