/* ===== Design Tokens ===== */
:root {
  --c-header: #AFC6D4;
  --c-cta: #AFC6D4;
  --c-dark-bg: #1b2b34;
  --c-light-bg: #e8f0f5;
  --c-text-light: #ffffff;
  --c-text-dark: #002946;
  --radius: 6px;

  --header-h: 90px;
  scroll-padding-top: var(--header-h);
}

* {
  box-sizing: border-box;
}

html, body {
  overflow-x: hidden;
}

img, svg, video, canvas {
  max-width: 100%;
  height: auto;
  display: block;
}


body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: #f5f9fb;
  color: var(--c-text-dark);
  line-height: 1.6;
  scroll-snap-type: y proximity;
}

h1, h2 {
  font-weight: 700;
  margin: 0 0 12px;
}

p {
  margin: 0 0 12px;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 3px solid rgba(0, 41, 70, 0.5);
  outline-offset: 2px;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

/* ===== Hero (long scroll, pinned logo) ===== */
.hero {
  position: relative;
  height: 150vh; /* deeper descent */
  overflow: visible;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  color: #fff;
  z-index: 1;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: url("images/underwater_background.png") center top / cover no-repeat;
  filter: brightness(0.5) saturate(1.1);
  transform: scale(1.05);
  transition: background-position 0.1s linear;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.25) 0%, rgba(0, 20, 30, 0.65) 100%);
  z-index: 1;
}

.hero-center {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  pointer-events: none;
  opacity: 1; /* will fade via JS */
}

.hero-center img {
  width: clamp(240px, 80vw, 1000px);
  height: auto;
  filter: drop-shadow(0 6px 24px rgba(0, 0, 0, 0.6));
}

.scroll-hint {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.9);
  font-family: 'Montserrat', sans-serif;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: 0.8rem;
  opacity: 1; /* will fade via JS */
  z-index: 3;
}

.scroll-hint::after {
  content: "▾";
  display: block;
  text-align: center;
  margin-top: 6px;
  animation: bob 1.4s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(4px); }
}

/* ===== Sections ===== */
.section {
  position: relative;
  z-index: 3; /* above hero logo */
  min-height: calc(100svh - var(--header-h));
  display: grid;
  place-items: center;
  padding: 48px 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.section.dark {
  background: var(--c-dark-bg);
  color: var(--c-text-light);
}

.section.light {
  background: var(--c-light-bg);
  color: var(--c-text-dark);
}

#about, #solutions, #projects {
  scroll-margin-top: 2px;
}

/* ===== Header (desktop) ===== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 16px 24px;
  background: transparent;
  transform: translateY(-100%);
  transition: background-color 0.3s ease, transform 0.3s ease;
  z-index: 1000;
  border-bottom: 2px solid var(--c-cta);
}

.header-visible .site-header {
  transform: translateY(0);
  background: var(--c-dark-bg);
}

.compact-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--c-text-light);
}

.compact-brand img {
  height: 70px;
  width: auto;
}

.site-header .site-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.site-header .site-nav a {
  position: relative;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--c-text-light);
  padding: 6px 4px;
}

.site-header .site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--c-text-light);
  transition: width 0.25s ease;
}

.site-header .site-nav a:hover::after {
  width: 100%;
}

.site-cta {
  margin-left: auto;
}

/* ===== Header (mobile: logo only) ===== */
@media (max-width: 720px) {
  .site-header {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
    padding: 10px 12px;
  }

  .compact-brand {
    justify-content: center;
  }

  .compact-brand img {
    height: 60px;
  }

  .site-header .site-nav,
  .site-header .site-cta {
    display: none;
  }
}

/* ===== Buttons ===== */
.btn-primary,
.btn-secondary {
  font-family: 'Montserrat', sans-serif;
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius);
  transition: transform 0.08s ease, filter 0.08s ease;
  will-change: transform, filter;
}

.btn-primary {
  background: var(--c-cta);
  color: var(--c-text-dark);
}

.btn-primary:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.btn-secondary {
  background: #ffffff;
  color: var(--c-cta);
  border: 2px solid var(--c-cta);
}

.btn-secondary:hover {
  background: #f6fbff;
  transform: translateY(-1px);
}

/* ===== Profile ===== */
.profile {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  align-items: center;
  max-width: 720px;
  margin: 28px auto 0;
  text-align: left;
}

.profile img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.25);
}

/* ===== Solutions ===== */
.solutions-wrap {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 1100px;
  margin: 0 auto;
}

.section-lead {
  text-align: center;
}

.section-lead h1 {
  margin-bottom: 8px;
}

.lead-sub {
  opacity: 0.8;
  margin: 0;
}

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

.solution-card {
  background: #fff;
  color: var(--c-text-dark);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  padding: 36px 28px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.solution-icon {
  width: 52px;
  height: 52px;
  color: var(--c-cta);
  margin-bottom: 18px;
}

@media (max-width: 860px) {
  .solutions-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Projects ===== */
.projects-section {
  padding-top: 48px;
  padding-bottom: 0;
  overflow: hidden;
}

.projects-lead {
  text-align: center;
  margin-bottom: 16px;
}

.projects-grid {
  width: 100%;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  overflow: hidden;
}

.project-card {
  position: relative;
  height: clamp(260px, 34vh, 420px);
  overflow: hidden;
  background: #0f1a20;
  color: var(--c-text-light);
  will-change: transform;
  transform: translateZ(0);
  transition: transform 0.28s ease, box-shadow 0.28s ease, outline 0.2s ease;
  outline: 0 solid transparent;
  z-index: 0;
}

.project-card[data-project="swpt"] {
  background: linear-gradient(135deg, #0f1a20 0%, #123042 100%);
}

.project-card[data-project="lca"] {
  background: linear-gradient(135deg, #0f1a20 0%, #1a3e4f 100%);
}

.project-card[data-project="wind"] {
  background: linear-gradient(135deg, #0f1a20 0%, #224a5c 100%);
}

.project-card.project-github {
  background: linear-gradient(135deg, #0f1a20 0%, #2b5667 100%);
}

.project-card:hover,
.project-card:focus-within,
.project-card.active {
  transform: scale(1.1);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.42);
  outline: 2px solid rgba(255, 255, 255, 0.14);
  z-index: 2;
}

@media (min-width: 861px) {
  .project-card:nth-child(3n+1) { transform-origin: left center; }
  .project-card:nth-child(3n)   { transform-origin: right center; }
  .project-card:nth-child(3n+2) { transform-origin: center center; }
}

.project-inner {
  height: 100%;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 28px 18px;
}

.project-title {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(1.05rem, 1.2vw + 0.9rem, 1.4rem);
  letter-spacing: 0.5px;
  margin: 0;
  text-transform: uppercase;
}

.project-reveal {
  max-width: 680px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

.project-card:hover .project-title,
.project-card:focus-within .project-title,
.project-card.active .project-title {
  transform: translateY(-3px);
}

.project-card:hover .project-reveal,
.project-card:focus-within .project-reveal,
.project-card.active .project-reveal {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.project-reveal .btn-primary,
.project-reveal .btn-secondary {
  margin-top: 12px;
}

@media (max-width: 1100px) and (min-width: 601px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .project-card  { height: clamp(260px, 36vh, 460px); }
}

@media (max-width: 600px) {
  .projects-grid { grid-template-columns: 1fr; }
  .project-card  { height: clamp(260px, 44vh, 520px); }
  .project-card:hover,
  .project-card:focus-within,
  .project-card.active { transform: scale(1.08); }
}

/* ===== Footer (clean & minimal) ===== */
.site-footer {
  --footer-bg: linear-gradient(180deg, #0f1a20 0%, #0c1720 100%);
  --footer-fg: #eaf3f7;
  --footer-dim: rgba(234, 243, 247, 0.6);
  --footer-line: rgba(234, 243, 247, 0.14);

  background: var(--footer-bg);
  color: var(--footer-fg);
  padding: 40px 20px 26px;
}

.footer-inner {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--footer-fg);
  margin-bottom: 18px;
}

.footer-brand img {
  height: 54px;
  width: auto;
  filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.35));
}

.footer-brand span {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.footer-sep {
  border: 0;
  height: 1px;
  background: var(--footer-line);
  margin: 18px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr auto auto;
  gap: 18px 24px;
  align-items: center;
}

.footer-tagline {
  margin: 0;
  opacity: 0.9;
}

.footer-links {
  display: inline-flex;
  gap: 18px;
}

.footer-links a {
  color: var(--footer-dim);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
}

.footer-links a:hover {
  color: var(--footer-fg);
}

.footer-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--footer-fg);
  transition: width .25s ease;
}

.footer-links a:hover::after {
  width: 100%;
}

.footer-contact {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  justify-content: flex-end;
}

.footer-link {
  color: var(--footer-dim);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--footer-fg);
  text-decoration: underline;
}

.footer-dot {
  color: var(--footer-line);
}

.footer-cta {
  grid-column: 1 / -1;
  justify-self: center;
  margin-top: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--footer-line);
  margin-top: 26px;
  padding-top: 16px;
  color: var(--footer-dim);
}

.footer-bottom small {
  opacity: 0.85;
}

.to-top {
  color: var(--footer-fg);
  text-decoration: none;
  font-size: 1rem;
  line-height: 1;
  padding: 6px 8px;
  border: 1px solid var(--footer-line);
  border-radius: 6px;
}

.to-top:hover {
  background: rgba(255, 255, 255, 0.06);
}

@media (max-width: 880px) {
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-contact {
    justify-content: center;
  }
  .footer-links {
    justify-content: center;
  }
  .footer-cta {
    margin-top: 10px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 10px;
  }
}