/* ==========================================================================
   EMXplore — Production Stylesheet
   Atmospheric scientific minimalism — portal-family cohesion.

   SECTIONS:
   1.  Custom Properties
   2.  Reset & Base
   3.  Utilities
   4.  Skip Link
   5.  Header & Navigation
   6.  Hero (cinematic, dark)
   7.  Buttons
   8.  Light Sections (content pages)
   9.  Intro / Path Cards
   10. Project Cards
   11. About Page Components
   12. Projects Page Hero
   13. CTA Section
   14. Footer
   15. Responsive
   16. Reduced Motion & Accessibility
   ========================================================================== */


/* ==========================================================================
   1. Custom Properties
   ========================================================================== */

:root {
  /* Dark surfaces (hero, header, footer) */
  --ink:          #06101f;
  --ink-2:        #0c1a30;
  --ink-3:        #132240;

  /* Light surfaces (content sections) */
  --surface:      #f8f9fb;
  --surface-alt:  #eef1f7;
  --white:        #ffffff;

  /* Text — dark pages */
  --text-light:   #eaf0ff;
  --text-muted:   #b0bfd6;

  /* Text — light pages */
  --text-dark:    #0f1a2e;
  --text-body:    #3b4a63;
  --text-dim:     #6b7a94;

  /* Accent colours — portal family */
  --cyan:         #16d7ff;                       /* bright portal cyan (dark bg, icons, hover borders) */
  --primary:      #0e7490;                       /* accessible teal (light-bg buttons, links) */
  --primary-hover:#0c6980;
  --cyan-soft:    rgba(22, 215, 255, 0.10);

  --gold:         #f6c453;                       /* warm portal gold */
  --gold-dark:    #9a7419;                       /* accessible gold for light bg */
  --gold-soft:    rgba(246, 196, 83, 0.10);

  --violet:       #7c3aed;
  --violet-soft:  rgba(124, 58, 237, 0.10);

  /* Borders */
  --border-dark:  rgba(255, 255, 255, 0.14);
  --border-light: rgba(15, 26, 46, 0.10);

  /* Fonts — sans-serif throughout, matching portals */
  --sans:  system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono:  ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Radii — portal family values */
  --radius-card: 22px;
  --radius-pill: 999px;
}


/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--surface);
  color: var(--text-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

::selection {
  background: rgba(246, 196, 83, 0.28);
  color: var(--text-dark);
}


/* ==========================================================================
   3. Utilities
   ========================================================================== */

.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 32px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}


/* ==========================================================================
   4. Skip Link
   ========================================================================== */

.skip-link {
  position: fixed;
  top: -100%;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 var(--radius-card) var(--radius-card);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 0;
}


/* ==========================================================================
   5. Header & Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(6, 16, 31, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-dark);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

/* Brand / Logo */
.brand {
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
}
.brand-mark {
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: 0.01em;
}
.brand-name {
  font-family: var(--sans);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-light);
}

/* Desktop navigation */
.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.site-nav a {
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--text-muted);
  padding: 7px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: color 0.2s ease, background 0.2s ease;
}
.site-nav a:hover {
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.08);
}
.site-nav a[aria-current="page"] {
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.10);
}

/* Explore Projects CTA in nav */
.site-nav .nav-cta {
  background: rgba(22, 215, 255, 0.10);
  border: 1px solid rgba(22, 215, 255, 0.28);
  border-radius: var(--radius-pill);
  color: var(--cyan);
  font-weight: 700;
}
.site-nav .nav-cta:hover {
  background: rgba(22, 215, 255, 0.18);
  border-color: rgba(22, 215, 255, 0.45);
  color: #fff;
}

/* Hamburger toggle — hidden on desktop */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span:not(.sr-only) {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-child(2) {
  transform: rotate(45deg) translate(3px, 3px);
}
.nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-child(3) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-child(4) {
  transform: rotate(-45deg) translate(3px, -3px);
}


/* ==========================================================================
   6. Hero (cinematic, dark — homepage only)
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--ink);
  color: var(--text-light);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Extremely slow Ken Burns animation */
@keyframes hero-drift {
  0%   { transform: scale(1);    }
  100% { transform: scale(1.04); }
}
.hero-media.animate-drift img {
  animation: hero-drift 30s ease-in-out infinite alternate;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(6, 16, 31, 0.30) 0%,
    rgba(6, 16, 31, 0.50) 50%,
    rgba(6, 16, 31, 0.82) 100%
  );
}

.hero-glow {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(
    ellipse 60% 50% at 50% 60%,
    rgba(22, 215, 255, 0.05) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding-top: 120px;
  padding-bottom: 100px;
}

/* Eyebrow badge (hero context) */
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #ffe4a3;
  background: var(--gold-soft);
  border: 1px solid rgba(246, 196, 83, 0.40);
  border-radius: var(--radius-pill);
  padding: 7px 16px;
  margin-bottom: 22px;
}

/* Headings — bold sans-serif throughout */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0;
}

.hero h1,
.hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  color: var(--text-light);
  margin-bottom: 20px;
  letter-spacing: -0.025em;
  line-height: 1.08;
}

.hero-intro {
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  color: var(--text-muted);
  max-width: 54ch;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* Scroll cue */
.scroll-cue {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  text-decoration: none;
  color: var(--text-muted);
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: color 0.2s ease;
  animation: bounce 3s ease-in-out infinite;
}
.scroll-cue:hover { color: var(--text-light); }
.scroll-cue svg {
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(6px); }
}


/* ==========================================================================
   7. Buttons
   ========================================================================== */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease,
              color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}
.button:hover {
  transform: translateY(-1px);
}

/* Primary — dark hero context (default) */
.button-primary {
  background: var(--cyan);
  color: var(--ink);
  border-color: var(--cyan);
  box-shadow: 0 8px 24px rgba(22, 215, 255, 0.18);
}
.button-primary:hover {
  background: #3ee0ff;
  box-shadow: 0 12px 30px rgba(22, 215, 255, 0.24);
}

/* Primary — light section context */
.section .button-primary,
.cta-section .button-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  box-shadow: 0 6px 18px rgba(14, 116, 144, 0.18);
}
.section .button-primary:hover,
.cta-section .button-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 10px 24px rgba(14, 116, 144, 0.24);
}

/* Ghost */
.button-ghost {
  color: var(--text-light);
  border-color: var(--border-dark);
}
.button-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.28);
}


/* ==========================================================================
   8. Light Sections
   ========================================================================== */

.section {
  position: relative;
  padding: 80px 0;
  background: var(--surface);
  color: var(--text-body);
}

.section:nth-of-type(even) {
  background: var(--white);
}

/* Subtle gradient bridge from dark hero into first light section */
.intro-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(180deg, rgba(6, 16, 31, 0.035), transparent);
  pointer-events: none;
  z-index: 0;
}

.section-heading {
  position: relative;
  z-index: 1;
  margin-bottom: 48px;
  max-width: 640px;
}

/* Section kicker badge (light-bg context) */
.section-kicker {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--gold-dark);
  background: var(--gold-soft);
  border: 1px solid rgba(246, 196, 83, 0.22);
  border-radius: var(--radius-pill);
  padding: 5px 14px;
  margin-bottom: 14px;
}

.section-heading h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--text-dark);
  margin-bottom: 12px;
}

.section-heading p {
  font-size: 1rem;
  color: var(--text-body);
  max-width: 56ch;
  line-height: 1.7;
}

.section-cta {
  margin-top: 48px;
  text-align: center;
}


/* ==========================================================================
   9. Intro / Path Cards
   ========================================================================== */

.path-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.path-card {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 30px 26px;
  box-shadow: 0 2px 12px rgba(15, 26, 46, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.path-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(15, 26, 46, 0.09);
  border-color: rgba(22, 215, 255, 0.30);
}

.path-index {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  display: block;
}

.path-card h3 {
  font-size: 1.2rem;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.path-card p {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
}


/* ==========================================================================
   10. Project Cards
   ========================================================================== */

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 2px 12px rgba(15, 26, 46, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
a.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 36px rgba(15, 26, 46, 0.10);
  border-color: rgba(22, 215, 255, 0.40);
}

.project-card-featured {
  grid-column: 1 / -1;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

.project-status {
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.status-live        { background: var(--cyan-soft);   color: var(--primary); }
.status-research    { background: var(--violet-soft); color: var(--violet); }
.status-educational { background: var(--gold-soft);   color: var(--gold-dark); }
.status-coming      { background: rgba(107, 122, 148, 0.08); color: var(--text-dim); }

.project-card h3 {
  font-size: 1.2rem;
  color: var(--text-dark);
}

.project-card p {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
  flex: 1;
}

.project-link {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: auto;
}
.project-link.muted {
  color: var(--text-dim);
  font-weight: 500;
}


/* ==========================================================================
   11. About Page Components
   ========================================================================== */

.about-panel {
  max-width: 760px;
}
.about-panel p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 20px;
}
.about-panel p:last-child { margin-bottom: 0; }

.about-origin p strong {
  color: var(--text-dark);
}
.about-origin p em {
  color: var(--primary);
  font-style: normal;
}

/* Connect Cards */
.connect-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.connect-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: inherit;
  box-shadow: 0 2px 10px rgba(15, 26, 46, 0.04);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.connect-card:hover {
  transform: translateY(-4px);
  border-color: rgba(22, 215, 255, 0.35);
  box-shadow: 0 10px 28px rgba(15, 26, 46, 0.08);
}

.connect-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--cyan);
}
.connect-icon svg {
  stroke: currentColor;
  fill: none;
}

.connect-label {
  font-family: var(--mono);
  font-size: 0.70rem;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  display: block;
  margin-bottom: 2px;
  text-transform: uppercase;
}
.connect-name {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-dark);
  display: block;
}


/* ==========================================================================
   12. Projects Page Hero (compact, dark)
   ========================================================================== */

.projects-hero {
  background: var(--ink);
  color: var(--text-light);
  padding: 140px 0 72px;
}
.projects-hero .eyebrow {
  color: #ffe4a3;
}
.projects-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text-light);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.projects-hero .hero-intro {
  color: var(--text-muted);
  max-width: 52ch;
  line-height: 1.7;
}


/* ==========================================================================
   13. CTA Section
   ========================================================================== */

.cta-section {
  background: var(--surface-alt);
}
.cta-section h2 {
  color: var(--text-dark);
}
.cta-section p {
  color: var(--text-body);
}


/* ==========================================================================
   14. Footer
   ========================================================================== */

.site-footer {
  background: var(--ink);
  color: var(--text-muted);
  padding: 72px 0 0;
  border-top: 1px solid var(--border-dark);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 36px 48px;
  padding-bottom: 40px;
}

.footer-col {
  min-width: 150px;
}
.footer-col:first-child {
  flex: 1 1 260px;
}
.footer-col:first-child p {
  margin-top: 12px;
  font-size: 0.9rem;
  max-width: 30ch;
  line-height: 1.6;
}

.footer-col h4 {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 8px;
}
.footer-links a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.footer-links a:hover {
  color: var(--cyan);
}

.footer-brand {
  display: inline-flex;
  align-items: baseline;
}
.footer-brand .brand-mark {
  font-size: 0.85rem;
}
.footer-brand .brand-name {
  font-size: 1.15rem;
}

.copyright {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  padding: 20px 0;
  margin-top: 8px;
  border-top: 1px solid var(--border-dark);
  opacity: 0.6;
  text-align: center;
}


/* ==========================================================================
   15. Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .path-grid {
    grid-template-columns: 1fr 1fr;
  }
  .project-grid {
    grid-template-columns: 1fr;
  }
  .project-card-featured {
    grid-column: auto;
  }
}

@media (max-width: 680px) {
  .wrap { padding: 0 20px; }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(6, 16, 31, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-dark);
    padding: 12px 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .site-nav.is-open {
    display: flex;
  }
  .site-nav a {
    padding: 12px 24px;
    font-size: 0.92rem;
    border-radius: 0;
  }
  .site-nav .nav-cta {
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: 1px solid var(--border-dark);
    margin-top: 4px;
    padding-top: 14px;
  }

  /* Hero */
  .hero-content {
    padding-top: 100px;
    padding-bottom: 80px;
  }

  /* Sections */
  .section { padding: 56px 0; }

  /* Path grid */
  .path-grid {
    grid-template-columns: 1fr;
  }

  /* Projects hero */
  .projects-hero {
    padding: 120px 0 48px;
  }

  /* Footer */
  .footer-grid {
    flex-direction: column;
    gap: 28px;
  }
}


/* ==========================================================================
   16. Reduced Motion & Accessibility
   ========================================================================== */

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .hero-media.animate-drift img {
    animation: none;
  }
}