/* Basic palette */
:root {
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #475569;
  --card: #f8fafc;
  --accent: #dc2626;
}
[data-theme="dark"] {
  --bg: #0b0f1a;
  --fg: #e5e7eb;
  --muted: #9ca3af;
  --card: #0f172a;
  --accent: #f87171;
}

/* Sticky footer layout */
html {
  height: 100%;
}
body {
  min-height: 100vh; 
  display: flex; 
  flex-direction: column;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}
main {
  flex: 1 0 auto;
} 
footer {
  flex-shrink: 0;
} 

/* Header / Navbar */
.site-brand {
  font-weight: 800;
  text-decoration: none;
  color: var(--fg);
  font-size: clamp(1.4rem, 2.2vw, 1.75rem); 
  letter-spacing: -0.01em;
}
header .navbar {
  --bs-navbar-color: var(--fg);
  --bs-navbar-hover-color: var(--accent);
  --bs-nav-link-color: var(--fg);
  --bs-nav-link-hover-color: var(--accent);
  --bs-navbar-active-color: var(--fg);
  --bs-navbar-brand-color: var(--fg);
  --bs-navbar-brand-hover-color: var(--accent);
}

/* Footer*/
footer {
  background: #f3f4f6;
  border-top: 1px solid rgba(100, 116, 139, 0.25);
  padding: 3.5rem 0;
  color: var(--muted);
}

body.compact-footer footer {
  padding: 3.5rem 0;
}

/* Theme toggle icon button */
.theme-btn {
  width: 36px;
  height: 36px;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  padding: 0;
}

/* Hero */
.hero {
  height: 30vh;
  min-height: 380px;
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.55) contrast(1.05);
  transform: scale(1.02);
}
.hero-canvas {
  position: absolute;
  inset: 0;
}
.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
}

/* grey hero variant */
.hero--plain {
  background: lightgrey;
}
.hero--plain .hero-bg,
.hero--plain .hero-canvas {
  display: none;
}
.hero--plain .hero-content {
  color: var(--fg);
}

/* Dark gradient hero */
.hero--particles {
  height: 42vh;
  min-height: 480px;
  background: radial-gradient(
    1200px 500px at 50% -10%,
    #1f2937 0%,
    #0f172a 60%,
    #0b0f1a 100%
  );
}
.hero--particles .hero-content {
  color: #fff;
}

/* Sections */
.section {
  padding: 4rem 0 3rem;
}
.section-title {
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Shadow-box feature cards */
.feature-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.feature-box {
  background: var(--card);
  border-radius: 1rem;
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.12);
  padding: 2rem;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  will-change: transform;
}
.feature-box:hover {
  transform: scale(1.015);
  box-shadow: 0 16px 32px rgba(2, 6, 23, 0.18);
}

/* Cards */
.card:hover {
  transform: translateY(-2px);
  transition: transform 0.2s ease;
}

/* Resume iframe */
iframe {
  border: 0;
}

/* Design document helpers */
.persona-card {
  background: var(--card);
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: 0 8px 18px rgba(2, 6, 23, 0.1);
  height: 100%;
}
.story {
  background: var(--card);
  border-left: 4px solid var(--accent);
  border-radius: 0.75rem;
  padding: 1rem 1.25rem;
  box-shadow: 0 6px 16px rgba(2, 6, 23, 0.08);
  margin-bottom: 1rem;
}
.story details {
  margin-top: 0.25rem;
}

/* UI blocks  */
.mock-browser {
  background: var(--bg);
  border-radius: 1rem;
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.12);
  overflow: hidden;
}
.mock-toolbar {
  height: 38px;
  background: linear-gradient(180deg, #e5e7eb, #cbd5e1);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
}
.mock-toolbar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #9ca3af;
  display: inline-block;
}
.mock-hero {
  height: 140px;
  background: #0ea5e9;
  opacity: 0.25;
}
.mock-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 12px;
}
.mock-card,
.mock-row,
.mock-section {
  background: #94a3b8;
  opacity: 0.25;
  border-radius: 0.5rem;
}
.mock-card {
  height: 68px;
}
.mock-section {
  height: 60px;
  margin: 12px;
}
.mock-list {
  padding: 0 12px 12px;
}
.mock-row {
  height: 48px;
  margin-bottom: 10px;
}

/*  Open Book */
.open-book {
  --flip-dur: 0.42s;
  --flip-ease: cubic-bezier(.22, .61, .36, 1);
}
.open-book {
  --w-open: min(980px, 94vw);
  --w-closed: min(460px, 88vw);
  position: relative;
  width: var(--w-open);
  height: 560px;
  margin: 0 auto;
  perspective: 1600px;
  transition: width .38s ease;
}

.open-book .spread {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  transform-style: preserve-3d;
  border-radius: 14px;
  box-shadow: 0 18px 42px rgba(2, 6, 23, .18);
}

.open-book .leaf {
  position: relative;
  background: var(--card);
  color: var(--fg);
  border: 1px solid rgba(2, 6, 23, .18);
  overflow: hidden;
  cursor: pointer;
}
.open-book .leaf.left { border-top-left-radius: 14px; border-bottom-left-radius: 14px; }
.open-book .leaf.right { border-top-right-radius: 14px; border-bottom-right-radius: 14px; }
.open-book .leaf-inner { height: 100%; padding: 1.25rem 1.25rem 3.25rem; overflow: auto; }

/* Spine */
.open-book .spine {
  position: absolute; top: 0; bottom: 0; left: 50%;
  width: 2px; transform: translateX(-1px);
  background: linear-gradient(180deg, rgba(0,0,0,.15), rgba(0,0,0,.05) 40%, rgba(0,0,0,.15));
  pointer-events: none;
}

/* Bottom UI */
.open-book .book-ui {
  position: absolute; left: 0; right: 0; bottom: .75rem;
  display: flex; align-items: center; justify-content: center;
  gap: .75rem;
}
.open-book .book-progress { color: var(--secondary-fg); }

/* CLOSED */
.open-book.is-closed { width: var(--w-closed); }     
.open-book.is-closed .leaf,
.open-book.is-closed .spine { display: none; }       
.open-book.is-closed .book-ui { display: none; }     

/* Full-width cover for closed state */
.cover-leaf {
  position: absolute; z-index: 3;
  top: 0; bottom: 0; left: 50%; right: 0;            
  border: 0;
  background: linear-gradient(135deg, #111827, #1f2937);
  color: #fff;
  transform-origin: left center;
  border-top-right-radius: 14px; border-bottom-right-radius: 14px;
  border-left: 1px solid rgba(2,6,23,.25);
  display: grid; place-items: center;
  padding: 2rem;
  box-shadow: 0 18px 40px rgba(2,6,23,.22);
}
.cover-leaf .cover-content h2 { font-weight: 800; letter-spacing: -.015em; }

/* When closed */
.open-book.is-closed .cover-leaf {
  left: 0; right: 0;
  border-top-left-radius: 14px; border-bottom-left-radius: 14px; /* rounded on both sides */
}

/* After opening, remove the cover */
.open-book.is-open .cover-leaf { display: none; }

/* page/cover */
.open-book .leaf.right.flip-next,
.cover-leaf.flip-next {
  transform-origin: left center;
  animation: flipNext var(--flip-dur) var(--flip-ease) both;
  will-change: transform, box-shadow;
  box-shadow: 0 10px 26px rgba(2,6,23,.18);
}
@keyframes flipNext {
  from { transform: rotateY(0deg); }
  to   { transform: rotateY(-170deg); }
}

.open-book .leaf.left.flip-prev {
  transform-origin: right center;
  animation: flipPrev var(--flip-dur) var(--flip-ease) both;
  will-change: transform, box-shadow;
  box-shadow: 0 10px 26px rgba(2,6,23,.18);
}
@keyframes flipPrev {
  from { transform: rotateY(0deg); }
  to   { transform: rotateY(170deg); }
}

/* cover flips when closing */
.cover-leaf.flip-back {
  transform-origin: left center;
  animation: flipBack var(--flip-dur) var(--flip-ease) both;
  will-change: transform, box-shadow;
  box-shadow: 0 10px 26px rgba(2,6,23,.18);
}
@keyframes flipBack {
  from { transform: rotateY(-170deg); }
  to   { transform: rotateY(0deg); }
}

/* Project: split bands */
.project-band {
  background: var(--bg);                          
  padding: clamp(2.5rem, 4vw, 4rem) 0;
}
.project-row {
  display: grid;
  grid-template-columns: 1.25fr 1fr;              
  gap: clamp(20px, 3vw, 48px);
  align-items: center;
  width: min(1200px, 92vw);
  margin: 0 auto;
  text-decoration: none;
  color: inherit;
}
.project-row--reverse { grid-template-columns: 1fr 1.25fr; }

.project-media {
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 18px 42px rgba(2,6,23,.18);
  background: #0b0f1a;
  min-height: 340px;
}
.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform .5s cubic-bezier(.22,.61,.36,1);
}

.project-row {
  transition: transform .22s cubic-bezier(.22,.61,.36,1), filter .22s ease;
  transform-origin: center;
  will-change: transform;
}
.project-row:hover {
  transform: scale(1.012);
  filter: drop-shadow(0 14px 28px rgba(2,6,23,.16));
}


/* elegant text */
.project-text {
  padding: clamp(1rem, 2.2vw, 1.75rem) 0;
}
.project-text .lead { color: var(--secondary-fg); }
.project-cta {
  display: inline-block;
  font-weight: 600;
  color: var(--accent);
}

/* Stack on small screens */
@media (max-width: 992px) {
  .project-row,
  .project-row--reverse { grid-template-columns: 1fr; }
  .project-media { min-height: 240px; }
}