/* ============================================================
   NSRG VENTURES — main stylesheet
   Dark near-monochrome design. Charcoal surfaces, amber accent.
   ============================================================ */

:root {
  --bg: #0F0F12;
  --surface: #191B21;
  --surface-2: #1E2129;
  --surface-3: #22252E;
  --border: #232630;
  --border-strong: #2C303B;
  --text: #F2F2F5;
  --text-muted: #A6A9B2;
  --text-dim: #6F737D;
  --white: #FFFFFF;
  --amber: #E8A33D;
  --amber-deep: #B97A1E;
  --charcoal-ink: #141519;
  --radius: 14px;
  --maxw: 1240px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a {
  color: var(--amber);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--amber-deep);
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease,
    color 0.2s ease, transform 0.2s ease;
  line-height: 1;
}

.btn-primary {
  background-color: var(--amber);
  color: var(--charcoal-ink);
  border-color: var(--amber);
}

.btn-primary:hover {
  background-color: var(--amber-deep);
  border-color: var(--amber-deep);
  color: var(--charcoal-ink);
}

.btn-outline {
  background-color: transparent;
  color: var(--white);
  border-color: var(--border-strong);
}

.btn-outline:hover {
  border-color: var(--white);
  color: var(--white);
}

.btn-dark {
  background-color: var(--charcoal-ink);
  color: var(--white);
  border-color: var(--charcoal-ink);
}

.btn-dark:hover {
  background-color: #0A0B0D;
  border-color: #0A0B0D;
  color: var(--white);
}

/* ============================================================
   NOTCHED TOP BAR
   ============================================================ */
.notch-nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  clip-path: polygon(
    0 0,
    100% 0,
    100% 100%,
    0 100%,
    0 calc(100% - 5px),
    18px calc(100% - 5px),
    18px calc(100% - 10px),
    36px calc(100% - 10px),
    36px calc(100% - 5px),
    54px calc(100% - 5px),
    54px 100%
  );
}

.notch-nav .nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.notch-nav .brand {
  justify-self: start;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--white);
}

.notch-nav .brand:hover {
  color: var(--white);
}

.notch-nav .nav-links {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.notch-nav .nav-links a {
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
}

.notch-nav .nav-links a:hover {
  color: var(--amber);
}

.notch-nav .nav-links a.active {
  color: var(--white);
}

.notch-nav .nav-cta {
  justify-self: end;
}

.nav-cta .btn {
  padding: 12px 22px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  justify-self: end;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  width: 44px;
  height: 40px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--white);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.notch-nav.open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.notch-nav.open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.notch-nav.open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  background-color: var(--surface-2);
  border-bottom: 1px solid var(--border);
  padding: 10px 24px 20px;
}

.mobile-menu ul {
  list-style: none;
}

.mobile-menu li {
  border-bottom: 1px solid var(--border);
}

.mobile-menu a {
  display: block;
  padding: 14px 0;
  color: var(--text);
  font-size: 16px;
}

.mobile-menu a:hover {
  color: var(--amber);
}

.notch-nav.open + .mobile-menu {
  display: block;
}

/* ============================================================
   HERO — full-width typographic
   ============================================================ */
.type-hero {
  position: relative;
  padding: 116px 0 100px;
}

.type-hero .hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.type-hero .hero-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 24px;
}

.type-hero h1 {
  font-size: 4.4rem;
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 15ch;
  margin-bottom: 28px;
}

.type-hero .hero-sub {
  max-width: 560px;
  font-size: 19px;
  line-height: 1.65;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.type-hero .hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 64px;
}

.type-hero .hero-rule {
  width: 50%;
  max-width: 620px;
  height: 3px;
  background-color: var(--amber);
}

.type-hero .est-label {
  position: absolute;
  top: 8px;
  right: -6px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* ============================================================
   STATEMENT ROW
   ============================================================ */
.statement-row {
  padding: 110px 0;
  border-top: 1px solid var(--border);
}

.statement-row .statement-text {
  max-width: 980px;
  margin: 0 auto;
  font-size: 40px;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.statement-row .statement-text em {
  font-style: normal;
  color: var(--amber);
}

/* ============================================================
   VENTURES LIST
   ============================================================ */
.ventures-list {
  padding: 0 0 110px;
}

.section-head {
  margin-bottom: 44px;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 14px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.section-title.muted {
  color: var(--text);
}

.section-head .ventures-lead {
  margin-top: 18px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 640px;
}

.venture-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: baseline;
  gap: 24px;
  padding: 30px 0;
  border-top: 1px solid var(--border);
}

.venture-row:last-child {
  border-bottom: 1px solid var(--border);
}

.venture-row .venture-num {
  font-size: 14px;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.1em;
}

.venture-row .venture-name {
  font-size: 30px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.venture-row .venture-sector {
  font-size: 15px;
  color: var(--text-muted);
  text-align: right;
}

/* ============================================================
   PRINCIPLE CARDS
   ============================================================ */
.principles {
  padding: 110px 0;
  border-top: 1px solid var(--border);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.principle-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 30px 38px;
  border-top: 3px solid var(--amber);
}

.principle-card .numeral {
  font-size: 34px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.02em;
  margin-bottom: 18px;
}

.principle-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
}

.principle-card p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* ============================================================
   METRICS STRIP
   ============================================================ */
.metrics {
  padding: 90px 0;
  background-color: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.metric {
  padding: 10px 32px;
  border-left: 1px solid var(--border-strong);
}

.metric:first-child {
  border-left: none;
  padding-left: 0;
}

.metric .metric-num {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  line-height: 1;
  margin-bottom: 12px;
}

.metric .metric-label {
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

/* ============================================================
   FAQ ACCORDION
   ============================================================ */
.faq {
  padding: 110px 0;
}

.faq-list {
  border-top: 1px solid var(--border);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: none;
  border: none;
  text-align: left;
  padding: 26px 4px;
  cursor: pointer;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  font-family: var(--font);
}

.faq-question:hover {
  color: var(--amber);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  color: var(--amber);
  font-size: 20px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  border-color: var(--amber);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 4px 28px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
  max-width: 780px;
}

/* ============================================================
   CTA BAND (amber split)
   ============================================================ */
.cta-band {
  padding: 96px 0;
  background-color: var(--amber);
  color: var(--charcoal-ink);
}

.cta-band .cta-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 40px;
}

.cta-band h2 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--charcoal-ink);
  margin-bottom: 16px;
}

.cta-band p {
  font-size: 18px;
  color: #3A2A10;
  max-width: 560px;
}

.cta-band .btn-dark {
  padding: 18px 36px;
  font-size: 16px;
}

/* ============================================================
   RAIL FOOTER
   ============================================================ */
.rail-footer {
  display: grid;
  grid-template-columns: 60px 1fr;
  background-color: var(--surface);
  border-top: 1px solid var(--border);
}

.rail-footer .footer-rail {
  background-color: var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
}

.rail-footer .footer-rail span {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.34em;
  color: var(--charcoal-ink);
}

.rail-footer .footer-main {
  padding: 64px 24px 0;
}

.rail-footer .footer-top {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-brand .footer-wordmark {
  font-size: 20px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
  max-width: 340px;
  margin-bottom: 20px;
}

.footer-brand .footer-contact {
  list-style: none;
}

.footer-brand .footer-contact li {
  margin-bottom: 6px;
  font-size: 15px;
  color: var(--text-muted);
}

.footer-brand .footer-contact a {
  color: var(--text-muted);
}

.footer-brand .footer-contact a:hover {
  color: var(--amber);
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  color: var(--text-muted);
  font-size: 15px;
}

.footer-col a:hover {
  color: var(--amber);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom p {
  font-size: 14px;
  color: var(--text-dim);
}

/* ============================================================
   SECONDARY PAGES (services / contact)
   ============================================================ */
.page-hero {
  padding: 96px 0 64px;
  border-bottom: 1px solid var(--border);
}

.page-hero .page-kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 18px;
}

.page-hero h1 {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 18ch;
  margin-bottom: 22px;
}

.page-hero p {
  font-size: 19px;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.65;
}

/* Services page */
.services-page .service-section {
  padding: 90px 0;
  border-bottom: 1px solid var(--border);
}

.service-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  align-items: start;
}

.service-grid .service-index {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.service-grid h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.service-grid .service-body p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.service-tag {
  font-size: 13px;
  color: var(--amber);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 6px 14px;
}

.process-overview {
  padding: 100px 0;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.process-step {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  background-color: var(--bg);
}

.process-step .step-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.process-step h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.process-step p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Contact page */
.contact-page .contact-section {
  padding: 90px 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 22px;
}

.contact-info p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.contact-details {
  list-style: none;
  margin-top: 28px;
}

.contact-details li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
}

.contact-details li:last-child {
  border-bottom: 1px solid var(--border);
}

.contact-details .detail-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.contact-details .detail-value {
  font-size: 17px;
  color: var(--text);
}

.contact-details .detail-value a {
  color: var(--amber);
}

.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}

.contact-form .form-field {
  margin-bottom: 22px;
}

.contact-form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background-color: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 16px;
  color: var(--text);
  font-family: var(--font);
  transition: border-color 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--amber);
}

.contact-form textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-note {
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 14px;
}

.form-success {
  display: none;
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px solid var(--amber);
  border-radius: 8px;
  color: var(--amber);
  font-size: 15px;
}

.form-success.visible {
  display: block;
}

.faq-mini {
  padding: 90px 0;
  border-top: 1px solid var(--border);
}

.faq-mini .mini-item {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.faq-mini .mini-q {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 10px;
}

.faq-mini .mini-a {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
  .type-hero h1 {
    font-size: 3.2rem;
  }

  .statement-row .statement-text {
    font-size: 30px;
  }

  .principle-grid {
    grid-template-columns: 1fr;
  }

  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 40px;
  }

  .metric:nth-child(3) {
    border-left: none;
    padding-left: 0;
  }

  .service-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cta-band .cta-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .notch-nav .nav-inner {
    grid-template-columns: 1fr auto;
  }

  .notch-nav .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
    justify-self: end;
    margin-left: 16px;
  }

  .notch-nav .nav-cta {
    display: none;
  }

  .type-hero {
    padding: 80px 0 70px;
  }

  .type-hero h1 {
    font-size: 2.5rem;
  }

  .type-hero .hero-sub {
    font-size: 17px;
  }

  .type-hero .hero-rule {
    width: 100%;
  }

  .type-hero .est-label {
    display: none;
  }

  .statement-row {
    padding: 70px 0;
  }

  .statement-row .statement-text {
    font-size: 24px;
  }

  .venture-row {
    grid-template-columns: 46px 1fr;
    grid-template-areas:
      "num name"
      "num sector";
    gap: 6px 16px;
  }

  .venture-row .venture-num {
    grid-area: num;
  }

  .venture-row .venture-name {
    grid-area: name;
    font-size: 24px;
  }

  .venture-row .venture-sector {
    grid-area: sector;
    text-align: left;
  }

  .metric .metric-num {
    font-size: 38px;
  }

  .metric {
    padding: 10px 20px;
  }

  .rail-footer {
    grid-template-columns: 44px 1fr;
  }

  .rail-footer .footer-main {
    padding: 48px 20px 0;
  }

  .rail-footer .footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-form .form-row {
    grid-template-columns: 1fr;
  }

  .page-hero h1 {
    font-size: 34px;
  }
}