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

:root {
  --white:      #ffffff;
  --off-white:  #F2F5F7;
  --light:      #CED9DE;
  --mid:        #6899A8;
  --navy:       #0B2D4A;
  --steel:      #0F6E7F;
  --teal:       #0EA5A0;
  --aqua:       #6FD3C6;
  --font-sans:  'Montserrat', 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Playfair Display', 'Georgia', serif;
  --nav-h:      80px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  color: var(--navy);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.7; }

/* ─── Navigation ────────────────────────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 28px 52px;
  z-index: 100;
  pointer-events: none;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  transition: background 0.3s, backdrop-filter 0.3s;
}

/* Homepage: start transparent, fade in on scroll */
nav.hero-nav {
  background: transparent;
  backdrop-filter: none;
}

nav.hero-nav .nav-logo {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

nav.hero-nav.scrolled .nav-logo {
  opacity: 1;
  pointer-events: all;
}
/* Logo & links: white over dark hero */
nav.hero-nav .logo-img {
  filter: brightness(0) invert(1);
  transition: filter 0.3s;
}
nav.hero-nav .nav-links a {
  color: rgba(255,255,255,0.9);
}
nav.hero-nav .nav-links a.active,
nav.hero-nav .nav-links a:hover {
  color: var(--aqua);
}

/* After scroll: restore original colors */
nav.hero-nav.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
}
nav.hero-nav.scrolled .logo-img {
  filter: none;
}
nav.hero-nav.scrolled .nav-links a {
  color: var(--navy);
}
nav.hero-nav.scrolled .nav-links a.active,
nav.hero-nav.scrolled .nav-links a:hover {
  color: var(--teal);
}
nav.hero-nav.scrolled .nav-logo::before {
  display: none;
}
nav.hero-nav.scrolled .nav-links {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  padding: 0;
  mask-image: none;
  -webkit-mask-image: none;
}

/* ─── Logo ───────────────────────────────────────────────────────────────────── */
.nav-logo {
  display: block;
  pointer-events: all;
  transition: opacity 0.2s;
  line-height: 0;
  position: relative;
}
.hero-nav .nav-logo::before {
  content: '';
  position: absolute;
  inset: -16px -28px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(8, 28, 50, 0.22);
  mask-image: radial-gradient(ellipse 85% 80% at 44% 52%, black 18%, transparent 68%);
  -webkit-mask-image: radial-gradient(ellipse 85% 80% at 44% 52%, black 18%, transparent 68%);
  pointer-events: none;
}
.nav-logo:hover { opacity: 0.8; }

.logo-img {
  height: 68px;
  width: auto;
  display: block;
}

/* ─── Nav Links (vertical right) ─────────────────────────────────────────────── */
.nav-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  list-style: none;
  pointer-events: all;
}

.hero-nav .nav-links {
  padding: 32px 24px 32px 48px;
  background: rgba(8, 28, 50, 0.52);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  mask-image:
    linear-gradient(to bottom, transparent 0%, black 22%, black 78%, transparent 100%),
    linear-gradient(to right,  transparent 0%, black 30%, black 100%);
  mask-composite: intersect;
  -webkit-mask-image:
    linear-gradient(to bottom, transparent 0%, black 22%, black 78%, transparent 100%),
    linear-gradient(to right,  transparent 0%, black 30%, black 100%);
  -webkit-mask-composite: destination-in;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--navy);
  transition: color 0.2s;
  display: block;
}

.nav-links a:hover { color: var(--teal); opacity: 1; }
.nav-links a.active { color: var(--teal); font-weight: 600; }

/* ─── Hero ──────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  overflow: hidden;
}

.dark-hero {
  background: url('hero-bg.png') center center / cover no-repeat;
}

/* Hero text overlay — visible above fold */
.hero-text {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 160px 52px 72px;
  background: linear-gradient(transparent, rgba(11,45,74,0.88) 50%);
}

.hero-text p {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 4.5vw, 4.2rem);
  line-height: 1.28;
  color: #ffffff;
  font-weight: 400;
  max-width: 900px;
}

.hero-text em {
  font-style: italic;
  color: var(--aqua);
}

/* ─── Exec Summary (below fold) ─────────────────────────────────────────────── */
.summary {
  padding: 80px 52px 100px;
  max-width: 1100px;
}

.summary-text {
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 2.8vw, 2.6rem);
  line-height: 1.55;
  color: var(--navy);
  font-weight: 400;
}

.summary-text em {
  font-style: italic;
  color: var(--steel);
}

/* ─── Section Cards ─────────────────────────────────────────────────────────── */
.section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--light);
}

.section-card {
  padding: 64px 52px;
  border-right: 1px solid var(--light);
  border-bottom: 1px solid var(--light);
  transition: background 0.2s;
}

.section-card:nth-child(even) { border-right: none; }
.section-card:hover { background: var(--off-white); }

.section-card h3 {
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 20px;
  font-weight: 600;
}

.section-card p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #4a5a65;
  font-weight: 400;
}

/* ─── About Page ─────────────────────────────────────────────────────────────── */
.about-statement {
  padding: 160px 52px 80px;
  max-width: 1100px;
}

.about-statement p {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  line-height: 1.28;
  color: var(--navy);
  font-weight: 400;
}

.about-founder {
  padding: 100px 52px 80px;
  max-width: 720px;
}

.about-founder p {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 1.6vw, 1.4rem);
  line-height: 1.8;
  color: #4a5a65;
  font-weight: 400;
}

.cv-link {
  display: inline-block;
  margin-top: 36px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: color 0.2s;
}
.cv-link:hover { color: var(--steel); opacity: 1; }

.credentials-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  padding: 40px 52px;
  border-bottom: 1px solid var(--light);
}

.credentials-strip span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  padding: 0 20px;
}

.credentials-strip span:first-child { padding-left: 0; }

.cred-dot {
  color: var(--light) !important;
  font-weight: 400 !important;
  letter-spacing: 0 !important;
  padding: 0 !important;
}

/* ─── Inner Page Hero ────────────────────────────────────────────────────────── */
.page-hero {
  padding: 160px 52px 80px;
  border-bottom: 1px solid var(--light);
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 400;
  line-height: 1.1;
  max-width: 800px;
}

.page-hero p {
  margin-top: 28px;
  font-size: 1.2rem;
  line-height: 1.75;
  color: #4a5a65;
  max-width: 620px;
  font-weight: 400;
}

/* ─── Content Block ────────────────────────────────────────────────────────── */
.content-block {
  padding: 80px 52px;
  border-bottom: 1px solid var(--light);
  max-width: 820px;
}

.content-block h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 400;
  margin-bottom: 24px;
  color: var(--navy);
}

.content-block p,
.content-block li {
  font-size: 1.1rem;
  line-height: 1.85;
  color: #4a5a65;
  margin-bottom: 20px;
  font-weight: 400;
}

.content-block ul { padding-left: 20px; }

/* ─── Software Showcase ─────────────────────────────────────────────────────── */
.software-section {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  padding: 100px 52px;
  align-items: center;
  border-top: 1px solid var(--light);
  background: var(--off-white);
}

.software-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 16px;
}

.software-heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 400;
  color: var(--navy);
  margin-bottom: 28px;
  line-height: 1.2;
}

.software-desc {
  font-size: 1rem;
  line-height: 1.85;
  color: #4a5a65;
  font-weight: 400;
  margin-bottom: 36px;
}

.software-cta {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: color 0.2s;
}
.software-cta:hover { color: var(--steel); opacity: 1; }

.software-screenshots {
  position: relative;
}

.screenshot-stack {
  position: relative;
  height: 340px;
  overflow: hidden;
}

.screenshot {
  position: absolute;
  width: 86%;
  height: 220px;
  object-fit: cover;
  object-position: top;
  border-radius: 6px;
  box-shadow: 0 8px 40px rgba(11,45,74,0.14);
  border: 1px solid var(--light);
}

.screenshot-back {
  top: 0; left: 0;
  opacity: 0.5;
  z-index: 1;
}

.screenshot-mid {
  top: 36px; left: 36px;
  opacity: 0.75;
  z-index: 2;
}

.screenshot-front {
  top: 72px; left: 72px;
  z-index: 3;
}

@media (max-width: 768px) {
  .software-section { grid-template-columns: 1fr; padding: 60px 24px; }
  .screenshot-stack { height: 220px; }
  .screenshot { height: 160px; }
}

/* ─── Contact ────────────────────────────────────────────────────────────────── */
.contact-section {
  padding: 80px 52px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.contact-info p {
  font-size: 1.1rem;
  line-height: 1.85;
  color: #4a5a65;
  font-weight: 400;
}

.contact-info a { color: var(--steel); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.contact-info a:hover { border-color: var(--steel); opacity: 1; }

.contact-details { margin-top: 40px; }

.contact-details .label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--mid);
  margin-top: 24px;
  margin-bottom: 6px;
}

.contact-details .value {
  font-size: 1.05rem;
  color: var(--navy);
  font-weight: 400;
}

/* ─── Footer ────────────────────────────────────────────────────────────────── */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.55);
  padding: 64px 52px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 48px;
}

.footer-brand {
  font-size: 2.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 20px;
  line-height: 1.1;
}

.footer-tagline {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--aqua);
  margin-bottom: 10px;
  font-weight: 500;
}

.footer-copy {
  font-size: 0.68rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.38);
  font-weight: 400;
}

.footer-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
}

.footer-links a {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--white); opacity: 1; }

.footer-social {
  display: flex;
  gap: 20px;
  margin-top: 10px;
  justify-content: flex-end;
}

.footer-social a {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}

.footer-social a:hover { color: var(--aqua); opacity: 1; }

/* ─── Divider ────────────────────────────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--light); margin: 0; }

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  nav { padding: 20px 24px; }
  .nav-links { gap: 8px; }
  .nav-links a { font-size: 0.62rem; }
  .summary { padding: 56px 24px 80px; }
  .section-grid { grid-template-columns: 1fr; }
  .section-card:nth-child(even) { border-right: 1px solid var(--light); }
  .page-hero { padding: 80px 24px 60px; }
  .content-block { padding: 60px 24px; }
  .contact-section { grid-template-columns: 1fr; gap: 48px; padding: 60px 24px; }
  footer { grid-template-columns: 1fr; padding: 48px 24px; }
  .footer-links { align-items: flex-start; }
  .footer-social { justify-content: flex-start; }
}