/* ===== RESET ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ===== THEME TOKENS ===== */
:root {
  --sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --serif: 'Instrument Serif', 'Georgia', serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-color: 0.4s ease;
}

[data-theme="dark"] {
  --bg:          #111110;
  --bg-raised:   #191918;
  --bg-hover:    #1e1e1c;
  --border:      #2a2a28;
  --border-hover:#3a3a37;
  --text:        #eeeeec;
  --text-secondary: #b5b3ad;
  --text-muted:  #85837d;
  --accent:      #7352B5;
  --accent-dim:  rgba(115, 82, 181, 0.12);
  --accent-hover:rgba(115, 82, 181, 0.06);
  --shadow:      0 1px 3px rgba(0,0,0,0.3);
}

[data-theme="light"] {
  --bg:          #fafaf8;
  --bg-raised:   #ffffff;
  --bg-hover:    #f0eeeb;
  --border:      #e0ddd7;
  --border-hover:#ccc9c1;
  --text:        #1a1a18;
  --text-secondary: #5a5850;
  --text-muted:  #8a877e;
  --accent:      #6344A3;
  --accent-dim:  rgba(99, 68, 163, 0.1);
  --accent-hover:rgba(99, 68, 163, 0.05);
  --shadow:      0 1px 3px rgba(0,0,0,0.06);
}

/* ===== PAGE TRANSITIONS ===== */
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  transition: background var(--transition-color), color var(--transition-color);
  opacity: 0;
  animation: pageIn 0.4s ease 0.05s forwards;
}

body.page-exit {
  animation: pageOut 0.25s ease forwards;
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pageOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-4px); }
}

/* ===== BASE ===== */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

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

/* ===== LAYOUT ===== */
.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== NAV ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  transition: background var(--transition-color);
}

nav::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border);
  transition: background var(--transition-color);
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-logo {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  transition: color 0.2s ease;
}

.sig {
  color: var(--accent);
  font-size: 0.7rem;
  display: inline-block;
  transition: color var(--transition-color), transform 0.4s var(--ease-out-expo), text-shadow 0.4s ease;
  line-height: 1;
  cursor: default;
}

.sig:hover {
  animation: sigPulse 1.6s ease-in-out infinite;
}

@keyframes sigPulse {
  0%, 100% { text-shadow: 0 0 4px var(--accent); }
  50%      { text-shadow: 0 0 16px var(--accent), 0 0 30px var(--accent); }
}

.nav-logo:hover .sig {
  animation: sigPulse 1.6s ease-in-out infinite;
}

.nav-links {
  display: flex;
  gap: 2px;
  list-style: none;
}

.nav-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 5px 10px;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
  background: var(--bg-hover);
}

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

/* theme toggle */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  padding: 0;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--bg-hover);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ===== HERO ===== */
.hero {
  padding: 80px 0 48px;
}

.hero-name-wrap {
  overflow: hidden;
  padding-bottom: 4px;
}

.hero-name {
  font-family: var(--serif);
  font-size: clamp(2.6rem, 7vw, 3.6rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin-bottom: 24px;
  transform: translateY(110%);
  animation: slideUp 0.8s var(--ease-out-expo) 0.1s forwards;
}

@keyframes slideUp {
  to { transform: translateY(0); }
}

.hero-bio {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 500px;
  transition: color var(--transition-color);
}

.hero-bio a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s ease, color 0.2s ease;
}

.hero-bio a:hover {
  text-decoration-color: var(--accent);
  color: var(--accent);
}

/* ===== SECTIONS ===== */
section {
  padding: 40px 0;
}

.section-divider {
  height: 1px;
  background: var(--border);
  transition: background var(--transition-color);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}

.section-title {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: lowercase;
  letter-spacing: 0.01em;
  transition: color var(--transition-color);
}

/* empty state message */
.empty-message {
  font-family: var(--serif);
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
  padding: 20px 0;
}

/* ===== WORK ===== */
.work-item {
  display: block;
  padding: 14px 16px;
  margin: 0 -16px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.work-item:hover {
  background: var(--bg-hover);
}

.work-item + .work-item { margin-top: 1px; }

.work-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.work-company {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  transition: color var(--transition-color);
}

.work-period {
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color var(--transition-color);
}

.work-role {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 2px;
  transition: color var(--transition-color);
}

.work-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 3px;
  transition: color var(--transition-color);
}

/* ===== PROJECTS ===== */
.project-grid { display: grid; gap: 10px; }

.project-card {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all 0.3s var(--ease-out-expo);
  position: relative;
}

.project-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-raised);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.project-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.project-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  transition: color var(--transition-color);
}

.project-arrow {
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: transform 0.3s var(--ease-out-expo), color 0.2s ease;
}

.project-card:hover .project-arrow {
  transform: translate(2px, -2px);
  color: var(--accent);
}

.project-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  transition: color var(--transition-color);
}

.project-tech {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.tag {
  font-size: 0.68rem;
  color: var(--text-muted);
  background: var(--accent-dim);
  padding: 2px 7px;
  border-radius: 4px;
  transition: background var(--transition-color), color var(--transition-color);
}

/* ===== THOUGHTS ===== */
.thought-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
  margin: 0 -16px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.thought-item:hover { background: var(--bg-hover); }
.thought-item + .thought-item { margin-top: 1px; }

.thought-title {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--text);
  font-weight: 400;
  font-style: italic;
  transition: color var(--transition-color);
}

.thought-date {
  font-size: 0.74rem;
  color: var(--text-muted);
  white-space: nowrap;
  transition: color var(--transition-color);
}

/* ===== SHELF ===== */
.shelf-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 20px;
  background: var(--bg-hover);
  padding: 3px;
  border-radius: 8px;
  width: fit-content;
  transition: background var(--transition-color);
}

.shelf-tab {
  font-size: 0.79rem;
  color: var(--text-muted);
  padding: 5px 14px;
  border-radius: 6px;
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--sans);
  transition: all 0.2s ease;
}

[data-theme="dark"] .shelf-tab {
  color: var(--text-secondary);
}

.shelf-tab:hover { color: var(--text); }

.shelf-tab.active {
  color: var(--text);
  background: var(--bg-raised);
  box-shadow: var(--shadow);
}

.shelf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 16px;
}

.shelf-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: default;
  position: relative;
}

.shelf-item a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  color: inherit;
}

.shelf-cover {
  aspect-ratio: 2 / 3;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: all 0.3s var(--ease-out-expo);
  position: relative;
  background-size: cover;
  background-position: center;
}

.shelf-item:hover .shelf-cover,
.shelf-item a:hover .shelf-cover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.shelf-cover-text {
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-muted);
  text-align: center;
  padding: 8px;
  line-height: 1.5;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color var(--transition-color);
}

.shelf-label-row {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.shelf-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
  transition: color var(--transition-color);
}

.review-arrow {
  font-size: 0.65rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-out-expo);
}

.shelf-item a:hover .review-arrow {
  transform: translate(1px, -1px);
}

.shelf-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: -4px;
  transition: color var(--transition-color);
}

.reading-indicator {
  display: flex;
  align-self: center;
  flex-shrink: 0;
  margin-left: 2px; /* Tweaked this slightly to match the gap of the arrow better */
}

.reading-indicator svg {
  display: block;
  width: 13px;
  height: 13px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.8;
}

.shelf-panel { display: none; }
.shelf-panel.active { display: block; }

/* ===== CONNECT ===== */
.connect-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.connect-link {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.connect-link:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

/* ===== FOOTER ===== */
footer {
  padding: 28px 0;
  margin-top: 20px;
}

footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-text {
  font-size: 0.74rem;
  color: var(--text-muted);
  transition: color var(--transition-color);
}

/* ===== FADE IN ===== */
.fade-in {
  opacity: 0;
  transform: translateY(10px);
  filter: blur(8px);
  transition: opacity 0.6s var(--ease-out-expo), 
              transform 0.6s var(--ease-out-expo),
              filter 0.6s var(--ease-out-expo);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0px);
}

.fade-in:nth-child(2) { transition-delay: 0.05s; }
.fade-in:nth-child(3) { transition-delay: 0.1s; }
.fade-in:nth-child(4) { transition-delay: 0.15s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 560px) {
  .hero { padding: 56px 0 32px; }
  .hero-name { font-size: 2.2rem; }
  .nav-links a { padding: 5px 6px; font-size: 0.78rem; }
  .work-row { flex-direction: column; gap: 2px; }
  .thought-item { flex-direction: column; gap: 3px; }
  .shelf-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 12px; }
  .connect-grid { flex-direction: column; }
  .connect-link { text-align: center; justify-content: center; }
  footer .container { flex-direction: column; gap: 8px; text-align: center; }
}