/* --------------------------------------------------------------------------
   Senior full-stack portfolio — light theme, black line-art avatar
   IBM Plex Sans + IBM Plex Serif · static site (DreamHost deploy via GitHub Actions)
   -------------------------------------------------------------------------- */

:root {
  color-scheme: light;
  --color-bg: #f6f4f0;
  --color-bg-alt: #ebe7df;
  --color-surface: #ffffff;
  --color-text: #1a1917;
  --color-text-muted: #5c5a54;
  --color-accent: #2d4a3e;
  --color-accent-hover: #1f342c;
  --color-accent-soft: color-mix(in srgb, var(--color-accent) 14%, transparent);
  --color-border: #d4cfc4;
  --color-focus: #1a5fb4;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-serif: "IBM Plex Serif", Georgia, serif;
  --space-xs: 0.35rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 5rem;
  --radius: 6px;
  --radius-pill: 999px;
  --shadow: 0 1px 2px rgba(26, 25, 23, 0.06), 0 4px 12px rgba(26, 25, 23, 0.04);
  --shadow-portrait: 0 4px 24px rgba(26, 25, 23, 0.08), 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  --max-width: 72rem;
  --narrow: 40rem;
  --avatar-pad: #fdfcfa;
}

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

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(
    circle at 1px 1px,
    rgba(45, 74, 62, 0.06) 1px,
    transparent 0
  );
  background-size: 22px 22px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--space-md);
  top: -100%;
  z-index: 100;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 600;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

.skip-link:focus {
  top: var(--space-md);
}

.container {
  width: min(100% - var(--space-lg) * 2, var(--max-width));
  margin-inline: auto;
}

.container.narrow {
  max-width: var(--narrow);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 3.75rem;
  padding-block: var(--space-sm);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
}

.logo:hover {
  color: var(--color-accent);
}

.logo:hover .logo-text {
  color: var(--color-accent);
}

.logo-mark-wrap {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  background: var(--avatar-pad);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.logo-mark {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
}

.logo-text {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.2em 0.35em;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
}

.logo-text-primary {
  white-space: nowrap;
}

.logo-text-hint {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  max-width: 14rem;
}

.logo:hover .logo-text-hint {
  color: var(--color-accent-hover);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
}

.nav-list a:hover {
  color: var(--color-text);
}

/* Hero */

.hero {
  padding: var(--space-2xl) 0 var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.hero-layout {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
}

@media (min-width: 52rem) {
  .hero-layout {
    grid-template-columns: minmax(14rem, 18rem) 1fr;
    gap: var(--space-2xl);
  }
}

.hero-portrait {
  margin: 0;
  justify-self: center;
}

@media (min-width: 52rem) {
  .hero-portrait {
    justify-self: start;
  }
}

.hero-portrait-ring {
  padding: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(
    145deg,
    #ffffff 0%,
    color-mix(in srgb, var(--color-accent) 18%, #ffffff) 45%,
    #e8e4dc 100%
  );
  box-shadow: var(--shadow-portrait);
}

.hero-portrait-frame {
  border-radius: var(--radius-pill);
  background: var(--avatar-pad);
  border: 1px solid var(--color-border);
  overflow: hidden;
  aspect-ratio: 1;
  max-width: min(16rem, 72vw);
  margin-inline: auto;
}

@media (min-width: 52rem) {
  .hero-portrait-frame {
    max-width: 17.5rem;
    margin-inline: 0;
  }
}

.hero-portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
}

.hero-copy {
  text-align: center;
}

@media (min-width: 52rem) {
  .hero-copy {
    text-align: left;
  }
}

.hero-kicker {
  margin: 0 0 var(--space-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.hero-title {
  margin: 0 0 var(--space-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

@media (min-width: 52rem) {
  .hero-title {
    align-items: flex-start;
  }
}

.hero-title-nick {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero-title-legal {
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0;
  max-width: 22em;
}

.hero-lede {
  margin: 0 0 var(--space-lg);
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 38rem;
  margin-inline: auto;
}

@media (min-width: 52rem) {
  .hero-lede {
    margin-inline: 0;
  }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

@media (min-width: 52rem) {
  .hero-actions {
    justify-content: flex-start;
  }
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #f6f4f0;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #f6f4f0;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-surface);
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

/* Sections */

.section {
  padding: var(--space-xl) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-intro {
  margin: calc(-1 * var(--space-sm)) 0 var(--space-lg);
  max-width: 36rem;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.prose p {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.prose p:last-child {
  margin-bottom: 0;
}

/* Timeline */

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.timeline-item {
  display: grid;
  gap: var(--space-md);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.timeline-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

@media (min-width: 48rem) {
  .timeline-item {
    grid-template-columns: 11rem 1fr;
    gap: var(--space-lg);
    align-items: start;
  }
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.timeline-dates {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.timeline-org {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.timeline-role {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
  font-weight: 600;
}

.bullet-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--color-text-muted);
}

.bullet-list li {
  margin-bottom: var(--space-sm);
}

.bullet-list li:last-child {
  margin-bottom: 0;
}

/* Skills */

.skill-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 40rem) {
  .skill-grid {
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  }
}

.skill-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  box-shadow: var(--shadow);
}

.section-alt .skill-block {
  background: var(--color-bg);
}

.skill-block-title {
  margin: 0 0 var(--space-sm);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 0.25rem 0.6rem;
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--color-accent-soft);
  color: var(--color-text);
  border-radius: var(--radius-pill);
  border: 1px solid color-mix(in srgb, var(--color-accent) 22%, transparent);
}

.tag-list-inline li {
  font-size: 0.75rem;
}

/* Projects */

.project-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-md);
}

@media (min-width: 52rem) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.project-card:hover {
  border-color: color-mix(in srgb, var(--color-accent) 35%, var(--color-border));
  box-shadow: 0 4px 20px rgba(26, 25, 23, 0.07);
}

.section-alt .project-card {
  background: var(--color-bg);
}

.project-title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
}

.project-desc {
  margin: 0;
  flex-grow: 1;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.project-links {
  margin: var(--space-xs) 0 0;
  font-size: 0.875rem;
  font-weight: 600;
}

.project-links a {
  text-decoration: none;
}

.project-links a:hover {
  text-decoration: underline;
}

.link-sep {
  margin: 0 0.35rem;
  color: var(--color-text-muted);
}

/* Contact */

.contact-section {
  border-top: 1px solid var(--color-border);
}

.contact-lede {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
}

.contact-email {
  margin: 0 0 var(--space-md);
  font-size: 1.25rem;
  font-weight: 600;
}

.contact-email a {
  text-decoration: none;
}

.contact-email a:hover {
  text-decoration: underline;
}

.contact-phone {
  margin: 0 0 var(--space-md);
  font-size: 1.0625rem;
  font-weight: 600;
}

.contact-phone a {
  text-decoration: none;
  color: var(--color-text-muted);
}

.contact-phone a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.contact-links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-weight: 600;
}

.contact-links a {
  text-decoration: none;
}

.contact-links a:hover {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.footer-inner {
  text-align: center;
}

.footer-copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-nick {
  font-weight: 500;
  color: color-mix(in srgb, var(--color-text-muted) 88%, var(--color-text));
}

.footer-copy a {
  font-weight: 500;
}