/* ==========================================================================
   Reset + base
   ========================================================================== */
*,
*::before,
*::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background-color 200ms ease, color 200ms ease;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: "Space Grotesk", "Inter", sans-serif; font-weight: 600; letter-spacing: -0.01em; margin: 0; }
h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); line-height: 1.1; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); margin-bottom: 1rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1rem; }
img { max-width: 100%; display: block; }
::selection { background: var(--accent); color: var(--accent-contrast); }

/* ==========================================================================
   Theme variables
   Three palettes × two modes, switched via html[data-theme][data-mode]
   ========================================================================== */

/* Theme 1: Navy + Amber — default */
html[data-theme="navy-amber"][data-mode="dark"] {
  --bg: #0B1220;
  --surface: #131C2E;
  --surface-2: #1A2540;
  --border: #1E2A44;
  --text: #E6EDF5;
  --muted: #8899B3;
  --accent: #E8B86D;
  --accent-hover: #F0C684;
  --accent-contrast: #0B1220;
  --hero-overlay: rgba(11, 18, 32, 0.82);
  --icon-filter: brightness(0) invert(1) opacity(0.75);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}
html[data-theme="navy-amber"][data-mode="light"] {
  --bg: #F5F1EA;
  --surface: #FFFFFF;
  --surface-2: #EFE8DB;
  --border: #E2DACE;
  --text: #0B1220;
  --muted: #566179;
  --accent: #B8863D;
  --accent-hover: #A07530;
  --accent-contrast: #FFFFFF;
  --hero-overlay: rgba(245, 241, 234, 0.78);
  --icon-filter: brightness(0) opacity(0.7);
  --shadow: 0 12px 32px rgba(11, 18, 32, 0.08);
}

/* Theme 2: Charcoal + Teal */
html[data-theme="charcoal-teal"][data-mode="dark"] {
  --bg: #0E0E11;
  --surface: #18181B;
  --surface-2: #212124;
  --border: #27272A;
  --text: #E4E4E7;
  --muted: #A1A1AA;
  --accent: #2DD4BF;
  --accent-hover: #5EEAD4;
  --accent-contrast: #0E0E11;
  --hero-overlay: rgba(14, 14, 17, 0.85);
  --icon-filter: brightness(0) invert(1) opacity(0.75);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}
html[data-theme="charcoal-teal"][data-mode="light"] {
  --bg: #FAFAFA;
  --surface: #FFFFFF;
  --surface-2: #F4F4F5;
  --border: #E4E4E7;
  --text: #18181B;
  --muted: #52525B;
  --accent: #0D9488;
  --accent-hover: #0F766E;
  --accent-contrast: #FFFFFF;
  --hero-overlay: rgba(250, 250, 250, 0.82);
  --icon-filter: brightness(0) opacity(0.7);
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
}

/* Theme 3: Ivory + Coral */
html[data-theme="ivory-coral"][data-mode="light"] {
  --bg: #FAF7F2;
  --surface: #FFFFFF;
  --surface-2: #F2EDE4;
  --border: #EBE5DB;
  --text: #1A2540;
  --muted: #556079;
  --accent: #E07856;
  --accent-hover: #CC6745;
  --accent-contrast: #FFFFFF;
  --hero-overlay: rgba(250, 247, 242, 0.8);
  --icon-filter: brightness(0) opacity(0.7);
  --shadow: 0 12px 32px rgba(26, 37, 64, 0.08);
}
html[data-theme="ivory-coral"][data-mode="dark"] {
  --bg: #1A2540;
  --surface: #243153;
  --surface-2: #2E3D64;
  --border: #2E3D64;
  --text: #F5EFE5;
  --muted: #9BA8C0;
  --accent: #F08870;
  --accent-hover: #F4A08B;
  --accent-contrast: #1A2540;
  --hero-overlay: rgba(26, 37, 64, 0.82);
  --icon-filter: brightness(0) invert(1) opacity(0.78);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-brand .bd-logo {
  display: block;
  width: 36px;
  height: 36px;
}
.nav-brand .bd-logo-body { fill: var(--text); }
.nav-brand .bd-logo-glasses { fill: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav-links a {
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 150ms ease;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }
.nav-links a.resume-link {
  border: 1px solid var(--accent);
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  color: var(--accent);
}
.nav-links a.resume-link:hover {
  background: var(--accent);
  color: var(--accent-contrast);
}

/* ==========================================================================
   Landing first-screen (navbar + hero + contact all fit within 100vh)
   ========================================================================== */
.viewport {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.viewport > .navbar { flex: 0 0 auto; }
.viewport > .hero { flex: 1 1 auto; min-height: 0; }
.viewport > .contact-strip { flex: 0 0 auto; }

/* ==========================================================================
   Hero (landing)
   ========================================================================== */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../images/light-trails-in-city.jpg");
  background-size: cover;
  background-position: center;
  filter: grayscale(0.3);
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--hero-overlay);
  backdrop-filter: blur(2px);
  z-index: 1;
}
.hero .container {
  position: relative;
  z-index: 2;
  padding-top: 3rem;
  padding-bottom: 3rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  font-weight: 500;
}
.hero h1 span { color: var(--accent); }
.hero-role {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 1rem 0 1.5rem;
}
.hero-summary {
  font-size: 1rem;
  color: var(--text);
  max-width: 52ch;
  margin-bottom: 2rem;
}
.hero-photo {
  justify-self: center;
  position: relative;
}
.hero-photo img {
  width: min(320px, 100%);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--accent);
  box-shadow: var(--shadow);
}

/* Core stack row */
.stack-strip {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.stack-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}
.stack-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem;
  align-items: center;
}
.stack-icons .tech {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}
.stack-icons .tech img {
  height: 32px;
  width: auto;
  filter: var(--icon-filter);
  transition: filter 150ms ease, transform 150ms ease;
}
.stack-icons .tech:hover img {
  filter: none;
  transform: translateY(-2px);
}
.stack-icons .tech span {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* Contact strip at bottom */
.contact-strip {
  position: relative;
  z-index: 2;
  padding: 0.85rem 0;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
}
.contact-strip .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.contact-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.contact-links a {
  color: var(--muted);
  font-size: 1.25rem;
  transition: color 150ms ease, transform 150ms ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.contact-links a:hover { color: var(--accent); transform: translateY(-2px); }
.contact-links a span { font-size: 0.9rem; letter-spacing: 0.02em; }
.contact-meta { font-size: 0.85rem; color: var(--muted); }

/* ==========================================================================
   About page
   ========================================================================== */
.page-header {
  padding: 5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}
.page-header h1 { margin-bottom: 0.75rem; }
.page-header .eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}
.page-header p { color: var(--muted); max-width: 65ch; font-size: 1.05rem; }

section.content-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
section.content-section:last-of-type { border-bottom: none; }

.section-title {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}

.narrative p {
  color: var(--text);
  max-width: 72ch;
  font-size: 1.05rem;
  line-height: 1.75;
}

/* Experience timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin-top: 2rem;
}
.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem;
  padding-left: 1.5rem;
  border-left: 2px solid var(--border);
  position: relative;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}
.timeline-date {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  padding-top: 0.1rem;
}
.timeline-body h3 {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}
.timeline-body .company {
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
.timeline-body p { color: var(--text); margin-bottom: 0.75rem; }
.timeline-body ul {
  margin: 0.75rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
}
.timeline-body ul li { margin-bottom: 0.4rem; font-size: 0.95rem; }

/* Skills grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.35rem;
}
.skill-card h4 {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}
.skill-card p {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0;
  line-height: 1.6;
}

/* Project stack pills (shared) */
.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.project-stack span {
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}

/* ==========================================================================
   Projects page
   ========================================================================== */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 2.5rem;
}
.project-filters button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}
.project-filters button:hover {
  color: var(--text);
  border-color: var(--muted);
}
.project-filters button.active {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
}

.projects-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.project-entry {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  transition: border-color 180ms ease, transform 180ms ease;
}
.project-entry:hover {
  border-color: var(--accent);
}
.project-entry[hidden] { display: none; }
.project-entry .project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.project-entry .project-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.project-entry .company-tag {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--border);
}
.project-entry .project-link {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 150ms ease, transform 150ms ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.project-entry .project-link:hover {
  color: var(--accent);
  transform: translateY(-1px);
}
.project-entry h3 {
  font-size: 1.35rem;
  margin-bottom: 0.3rem;
}
.project-entry .tagline {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.project-entry .description {
  color: var(--text);
  font-size: 0.97rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}
.project-entry h4 {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.6rem;
}
.project-entry .highlights {
  margin: 0 0 1.25rem;
  padding-left: 1.15rem;
  color: var(--text);
}
.project-entry .highlights li {
  margin-bottom: 0.4rem;
  font-size: 0.93rem;
  line-height: 1.55;
}
.project-entry .highlights li::marker { color: var(--accent); }

/* ==========================================================================
   Theme switcher (fixed, bottom-right)
   ========================================================================== */
.theme-switcher {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.5rem;
  box-shadow: var(--shadow);
  font-size: 0.85rem;
}
.theme-switcher button {
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--muted);
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  transition: background 150ms ease, color 150ms ease;
}
.theme-switcher .label {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  user-select: none;
}
.theme-switcher .label:hover { color: var(--text); }
.theme-switcher.collapsed [data-theme-value],
.theme-switcher.collapsed .divider { display: none; }
.theme-switcher button:hover { color: var(--text); }
.theme-switcher .swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin-right: 0.4rem;
  vertical-align: -2px;
  border: 1px solid rgba(255,255,255,0.08);
}
.theme-switcher button[data-active="true"] {
  background: var(--surface-2);
  color: var(--text);
}
.theme-switcher .divider {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 0.25rem;
}
.theme-switcher .mode-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  font-size: 1rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}
footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; gap: 2rem; }
  .hero-photo { order: -1; }
  .hero-photo img { width: 200px; }
  .hero-summary { margin-left: auto; margin-right: auto; }
  .stack-icons { justify-content: center; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.8rem; }
  .nav-links a.resume-link { padding: 0.4rem 0.7rem; }
  .theme-switcher { bottom: 0.75rem; right: 0.75rem; padding: 0.3rem; }
  .theme-switcher .label { display: none; }
}
@media (max-width: 520px) {
  .contact-strip .container { flex-direction: column; align-items: flex-start; }
  .contact-links { flex-wrap: wrap; }
}

.margin-0 {
  margin: 0 !important;
}