/*
  Benjamin Steffes-Lai Portfolio
  Traditional, professional, responsive one-page layout.
*/

/* -------------------------
   Design tokens
------------------------- */
:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f4f7fb;
  --color-text: #142033;
  --color-muted: #5b6778;
  --color-heading: #0f2742;
  --color-primary: #0f4c81;
  --color-primary-dark: #0a355d;
  --color-accent: #1f7a8c;
  --color-border: #dbe3ee;
  --color-card: #ffffff;

  --shadow-sm: 0 4px 18px rgba(15, 39, 66, 0.08);
  --shadow-md: 0 16px 40px rgba(15, 39, 66, 0.12);

  --radius-sm: 0.5rem;
  --radius-md: 0.9rem;
  --radius-lg: 1.25rem;

  --container: 72rem;
  --header-height: 4.75rem;
}

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

html {
  scroll-behavior: smooth;
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
}

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

p {
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--color-heading);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

/* Makes anchor navigation stop below the sticky header */
section {
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

/* -------------------------
   Accessibility
------------------------- */
.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
  transform: translateY(-160%);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  color: #ffffff;
  background: var(--color-primary);
  font-weight: 700;
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

/* -------------------------
   Header / navigation
------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 0.75rem;
  font-weight: 800;
  color: var(--color-heading);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 2.45rem;
  height: 2.45rem;
  border-radius: var(--radius-sm);
  color: #ffffff;
  background: var(--color-primary);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

.brand__text {
  display: none;
}

/* Mobile-first: nav links remain visible and horizontally scrollable */
.nav__links {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  overflow-x: auto;
  max-width: 100%;
  padding-block: 0.25rem;
  color: var(--color-muted);
  font-size: 0.88rem;
  font-weight: 700;
  white-space: nowrap;
  scrollbar-width: none;
}

.nav__links::-webkit-scrollbar {
  display: none;
}

.nav__links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.35rem;
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.nav__links a:hover {
  color: var(--color-primary);
  background: #edf5fb;
}

.nav__button {
  color: #ffffff !important;
  background: var(--color-primary);
}

.nav__button:hover {
  color: #ffffff !important;
  background: var(--color-primary-dark) !important;
}

/* -------------------------
   Hero
------------------------- */
.hero {
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, #f7fbff 0%, #ffffff 55%, #f4f7fb 100%);
  padding-block: clamp(4rem, 8vw, 7rem);
}

.hero__grid {
  display: grid;
  align-items: center;
  gap: 2rem;
}

.hero__content {
  max-width: 46rem;
}

.eyebrow,
.section__kicker,
.summary-card__label {
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin-top: 0.85rem;
  max-width: 12ch;
  font-size: clamp(2.55rem, 9vw, 5.1rem);
}

.hero__lead {
  margin-top: 1.25rem;
  max-width: 43rem;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.75rem 1.1rem;
  font-weight: 800;
  transition:
    transform 160ms ease,
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  color: #ffffff;
  background: var(--color-primary);
}

.button--primary:hover {
  background: var(--color-primary-dark);
}

.button--secondary {
  color: var(--color-primary);
  border-color: var(--color-border);
  background: #ffffff;
}

.button--secondary:hover {
  border-color: var(--color-primary);
}

/* -------------------------
   Summary card
------------------------- */
.summary-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 4vw, 1.6rem);
  background: var(--color-card);
  box-shadow: var(--shadow-md);
}

.summary-card__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.summary-card__avatar,
.summary-card__photo {
  flex: 0 0 auto;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 50%;
}

.summary-card__avatar {
  display: grid;
  place-items: center;
  color: #ffffff;
  background: var(--color-primary);
  font-weight: 900;
  letter-spacing: 0.04em;
}

.summary-card__photo {
  object-fit: cover;
}

.summary-card h2 {
  margin-top: 0.25rem;
  font-size: 1.4rem;
}

.summary-card p {
  margin-top: 0.25rem;
  color: var(--color-muted);
}

.quick-facts {
  display: grid;
  gap: 1rem;
  margin: 1.25rem 0 0;
}

.quick-facts div {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.quick-facts div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.quick-facts dt {
  color: var(--color-heading);
  font-size: 0.86rem;
  font-weight: 800;
}

.quick-facts dd {
  margin: 0.25rem 0 0;
  color: var(--color-muted);
}

/* -------------------------
   General sections
------------------------- */
.section {
  padding-block: clamp(3.5rem, 7vw, 5.75rem);
}

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

.section__grid {
  display: grid;
  gap: 2rem;
}

.section__intro {
  max-width: 26rem;
}

.section__header {
  max-width: 46rem;
  margin-bottom: 1.6rem;
}

.section h2 {
  margin-top: 0.55rem;
  font-size: clamp(2rem, 5vw, 3.15rem);
}

.section__body {
  color: var(--color-muted);
  font-size: 1.03rem;
}

.section__body p + p {
  margin-top: 1rem;
}

.responsibility-card {
  margin-top: 1.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.responsibility-card h3 {
  font-size: 1.25rem;
}

.check-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.9rem;
}

.check-list li {
  position: relative;
  padding-left: 1.6rem;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent);
  font-weight: 900;
}

/* -------------------------
   Timeline
------------------------- */
.timeline {
  display: grid;
  gap: 1rem;
}

.timeline__item {
  display: grid;
  gap: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.timeline__meta {
  color: var(--color-primary);
  font-size: 0.9rem;
  font-weight: 800;
}

.timeline__content h3 {
  font-size: 1.25rem;
}

.timeline__company {
  margin-top: 0.25rem;
  color: var(--color-muted);
  font-weight: 700;
}

.timeline__content p:last-child {
  margin-top: 0.65rem;
  color: var(--color-muted);
}

/* -------------------------
   Cards
------------------------- */
.cards-grid,
.credential-grid {
  display: grid;
  gap: 1rem;
}

.skill-card,
.credential-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.skill-card h3,
.credential-card h3 {
  font-size: 1.18rem;
}

.skill-card p,
.credential-card p {
  margin-top: 0.55rem;
  color: var(--color-muted);
}

/* -------------------------
   Community
------------------------- */
.role-list {
  display: grid;
  gap: 0.85rem;
}

.role-list li {
  border-left: 4px solid var(--color-primary);
  padding: 0.1rem 0 0.1rem 1rem;
}

.role-list strong {
  display: block;
  color: var(--color-heading);
}

.role-list span {
  display: block;
  margin-top: 0.2rem;
  color: var(--color-muted);
}

/* -------------------------
   Contact / footer
------------------------- */
.section--contact {
  background: var(--color-heading);
  color: #ffffff;
}

.section--contact h2,
.section--contact .section__kicker {
  color: #ffffff;
}

.section--contact p {
  max-width: 42rem;
  color: rgba(255, 255, 255, 0.82);
}

.contact-card {
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 5vw, 2rem);
  background: rgba(255, 255, 255, 0.06);
}

.site-footer {
  padding-block: 1.25rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  background: #ffffff;
  font-size: 0.92rem;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
}

.footer__inner a {
  color: var(--color-primary);
  font-weight: 800;
}

/* -------------------------
   Responsive layout
------------------------- */
@media (min-width: 42rem) {
  .brand__text {
    display: inline;
  }

  .cards-grid,
  .credential-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline__item {
    grid-template-columns: 10rem minmax(0, 1fr);
  }
}

@media (min-width: 58rem) {
  .hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.75fr);
    gap: clamp(2.5rem, 5vw, 4rem);
  }

  .section__grid {
    grid-template-columns: minmax(14rem, 0.7fr) minmax(0, 1.3fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .cards-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .credential-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 76rem) {
  .container {
    width: min(100% - 3rem, var(--container));
  }

  .nav__links {
    gap: 0.55rem;
  }
}