/* Design tokens */
:root {
  --surface-strong: #fffaf4;
  --surface-subtle: #f2e8db;
  --surface-muted: #ece0d1;
  --border-color: #dbc9b6;
  --accent-soft: #f4e8da;
  --accent-ink: #5f3821;
  --page-glow: rgb(255 255 255 / 55%);
  --page-tint: #f8f3ec;
  --header-surface: rgb(255 250 244 / 88%);
  --header-shadow: 0 10px 32px rgb(34 25 17 / 8%);
  --shadow-soft: 0 20px 48px rgb(55 38 20 / 8%);
  --shadow-hover: 0 24px 54px rgb(55 38 20 / 12%);
  --shadow-control-hover: 0 12px 28px rgb(55 38 20 / 10%);
  --radius-pill: 999px;
  --radius-card: 1.5rem;
  --control-min-height: 48px;
  --interactive-transition: 0.22s ease;
}

.dark {
  --surface-strong: #1a1511;
  --surface-subtle: #221b15;
  --surface-muted: #18120f;
  --border-color: #3b3128;
  --accent-soft: #2a2018;
  --accent-ink: #e2ba95;
  --page-glow: rgb(226 186 149 / 10%);
  --page-tint: #17120e;
  --header-surface: rgb(18 15 12 / 86%);
  --header-shadow: 0 10px 32px rgb(0 0 0 / 24%);
  --shadow-soft: 0 18px 44px rgb(0 0 0 / 32%);
  --shadow-hover: 0 22px 50px rgb(0 0 0 / 40%);
}

/* Motion */
@keyframes hero-copy-slide {
  from {
    transform: translateX(-10px);
  }

  to {
    transform: translateX(0);
  }
}

/* Page frame */
html {
  scroll-behavior: smooth;
  background:
    radial-gradient(circle at top left, var(--page-glow), transparent 32%),
    linear-gradient(180deg, var(--page-tint) 0%, var(--background-color) 24%);
}

#hero,
#about,
#experience,
#projects,
#education,
#achievements,
#life,
#ios-apps,
#contact {
  scroll-margin-top: 6rem;
}

/* Header and search */
header {
  z-index: 10;
}

header .navbar {
  padding-block: 0.95rem;
}

.showHeaderOnTop {
  top: 0;
  position: sticky;
  background: var(--header-surface);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--header-shadow);
}

header .navbar .navbar-nav a,
header .navbar-brand,
.navbar-text,
#search-results .card a {
  color: var(--text-color) !important;
  opacity: 1;
}

.navbar-brand {
  letter-spacing: 0.04em;
}

header .nav-link:hover,
header .navbar-brand:hover,
#search-results .card a:hover {
  color: var(--primary-color) !important;
}

#theme-toggle,
.dropdown-menu,
#search,
#search-content {
  background-color: var(--surface-strong) !important;
}

#search,
#search-content {
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-soft);
}

/* Hero */
#hero {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
}

#hero .content.animate {
  animation: hero-copy-slide 0.45s ease-out;
}

#hero .subtitle {
  display: inline-block;
  margin-bottom: 0.75rem;
  color: var(--text-color) !important;
  opacity: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

#hero h1 {
  color: var(--text-color) !important;
  line-height: 0.98;
  margin-bottom: 0.55rem;
}

#hero h2 {
  color: var(--text-secondary-color) !important;
  line-height: 1.1;
  opacity: 1;
}

#hero .hero-content {
  max-width: 54ch;
  color: var(--text-secondary-color);
  margin-top: 1.35rem;
  font-size: 1.03rem;
  line-height: 1.8;
}

#hero .hero-content p {
  margin: 0;
}

#hero .hero-cta {
  margin-top: 2rem;
}

#hero .hero-cta .cta-secondary,
#contact .hero-cta .cta-secondary,
#projects .float-end .btn,
.achievement-proof__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: var(--control-min-height);
  margin-top: 0 !important;
  padding: 0.78rem 1.25rem;
  border-radius: var(--radius-pill) !important;
  border: 1px solid transparent !important;
  background-color: var(--surface-strong) !important;
  border-color: var(--border-color) !important;
  color: var(--text-color) !important;
  font-family: Alata, sans-serif;
  line-height: 1;
  letter-spacing: 0.02em;
  transition:
    transform var(--interactive-transition),
    border-color var(--interactive-transition),
    background-color var(--interactive-transition),
    color var(--interactive-transition),
    box-shadow var(--interactive-transition);
}

#hero .hero-cta .cta-secondary:hover,
#hero .hero-cta .cta-secondary:focus-visible,
#contact .hero-cta .cta-secondary:hover,
#contact .hero-cta .cta-secondary:focus-visible,
#projects .float-end .btn:hover,
#projects .float-end .btn:focus-visible,
.achievement-proof__link:hover,
.achievement-proof__link:focus-visible {
  background-color: var(--accent-soft) !important;
  border-color: var(--primary-color) !important;
  color: var(--text-color) !important;
  opacity: 1;
  transform: translateY(-1px);
  box-shadow: var(--shadow-control-hover);
}

.site-icon {
  width: 1rem;
  height: 1rem;
  flex: none;
}

#hero .hero-bottom-svg {
  color: var(--accent-ink);
  opacity: 0.18;
}

#hero .hero-bottom-svg svg {
  display: block;
}

#hero .image img {
  max-width: 320px;
  border-width: 10px;
  border-color: var(--surface-strong);
  box-shadow: var(--shadow-soft);
  background: var(--surface-strong);
}

/* Shared section rhythm */
#about .content,
.onepage-topic-content {
  max-width: 68ch;
  margin-inline: auto;
}

#about h3,
#experience h3,
#education h3,
#achievements h3,
#life h3,
#projects h3,
#ios-apps h3,
#contact h3 {
  color: var(--text-secondary-color) !important;
  letter-spacing: 0.03em;
}

#about .content,
.onepage-topic-content p,
.onepage-topic-group li,
#projects .card-text,
#achievements .achievement-proof__body {
  opacity: 1;
}

/* About and one-page topic lists */
#about ul {
  grid-template-columns: repeat(2, minmax(170px, 1fr));
  gap: 8px 14px;
}

#about ul li,
.onepage-topic-group li {
  position: relative;
  padding-left: 1.1rem;
}

#about ul li::before,
.onepage-topic-group li::before {
  content: "▹";
  color: var(--primary-color);
  left: 0;
  position: absolute;
}

.onepage-topic-group {
  margin-top: 1.75rem;
}

.onepage-topic-group h5 {
  margin-bottom: 0.7rem;
}

.onepage-topic-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Project cards */
#projects .card {
  min-height: 100%;
  width: 100%;
  background-color: var(--surface-strong) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

#projects .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

#projects .card .card-head {
  aspect-ratio: 16 / 10;
  background: linear-gradient(
    180deg,
    var(--surface-subtle) 0%,
    var(--surface-muted) 100%
  );
}

#projects .card .card-img-top {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#projects .card .card-body,
#projects .card .card-footer {
  background: transparent !important;
}

#projects .card .card-footer {
  border-top: 1px solid var(--border-color);
  padding-inline: 1rem;
}

#projects .badge {
  display: inline-flex;
  align-items: center;
  margin: 0 0.35rem 0.35rem 0;
  padding: 0.38rem 0.72rem;
  border-radius: var(--radius-pill);
  background-color: var(--accent-soft) !important;
  color: var(--text-color) !important;
  border: 1px solid var(--border-color);
  font-weight: 500;
}

/* iOS app links */
#ios-apps .ios-apps__header {
  max-width: 54ch;
  margin-inline: auto;
  margin-bottom: 2rem;
}

#ios-apps .ios-apps__header p {
  margin: 0.75rem 0 0;
  color: var(--text-secondary-color);
}

#ios-apps .ios-apps__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: 860px;
  margin-inline: auto;
  padding-inline: 1rem;
}

#ios-apps .ios-apps__link {
  display: grid;
  grid-template-columns: 96px 1fr;
  align-items: center;
  gap: 1.05rem;
  min-height: 124px;
  padding: 0.9rem 1rem 0.9rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  background: var(--surface-strong);
  color: var(--text-color) !important;
  text-decoration: none;
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--interactive-transition),
    border-color var(--interactive-transition),
    background-color var(--interactive-transition),
    box-shadow var(--interactive-transition);
}

#ios-apps .ios-apps__link:hover,
#ios-apps .ios-apps__link:focus-visible {
  background-color: var(--accent-soft);
  border-color: var(--primary-color);
  color: var(--text-color) !important;
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

#ios-apps .ios-apps__media {
  aspect-ratio: 1;
  width: 96px;
  overflow: hidden;
  border-radius: 0.8rem;
  background: var(--surface-subtle);
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 22%);
}

#ios-apps .ios-apps__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#ios-apps .ios-apps__copy {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
}

#ios-apps .ios-apps__name {
  font-family: Alata, sans-serif;
  font-size: 1.05rem;
  line-height: 1.2;
}

#ios-apps .ios-apps__subtitle {
  color: var(--text-secondary-color);
  font-size: 0.92rem;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

/* Certification cards */
#achievements .achievement-proof {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.45rem;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-color);
  background: var(--surface-strong);
  box-shadow: var(--shadow-soft);
}

#achievements .achievement-proof__issuer {
  display: inline-flex;
  margin: 0 0 0.95rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--text-color);
  font-family: Alata, sans-serif;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

#achievements .achievement-proof__title {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.35;
  color: var(--text-color) !important;
}

#achievements .achievement-proof__body {
  display: grid;
  gap: 0.9rem;
  color: var(--text-secondary-color);
}

#achievements .achievement-proof__detail {
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-color);
}

#achievements .achievement-proof__detail--rich {
  padding-top: 0;
  border-top: 0;
}

#achievements .achievement-proof__label {
  display: inline-block;
  margin-bottom: 0.35rem;
  color: var(--text-color);
  font-family: Alata, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#achievements .achievement-proof__detail p,
#achievements .achievement-proof__detail ul {
  margin: 0;
}

#achievements .achievement-proof__copy p {
  margin: 0;
}

#achievements .achievement-proof__detail ul {
  padding-left: 1rem;
}

#achievements .achievement-proof__footer {
  margin-top: auto;
  padding-top: 0.35rem;
}

/* Contact and footer */
#contact .text-center {
  max-width: 58ch;
  margin-inline: auto;
}

footer .text-center p {
  max-width: 64ch;
  margin-inline: auto;
}

footer .text-secondary {
  color: var(--text-secondary-color) !important;
}

/* Responsive adjustments */
@media (max-width: 991px) {
  #hero {
    min-height: auto;
    padding-top: 2rem;
  }

  #hero .hero-cta {
    margin-top: 1.2rem;
  }

  #about ul {
    grid-template-columns: 1fr;
  }

  #achievements .achievement-proof {
    padding: 1.2rem;
  }
}

@media (max-width: 767px) {
  #hero .image img {
    max-width: 260px;
  }

  .cta-secondary,
  #projects .float-end .btn,
  .achievement-proof__link {
    width: 100%;
  }

  #ios-apps .ios-apps__grid {
    grid-template-columns: 1fr;
    padding-inline: 0.75rem;
  }

  #ios-apps .ios-apps__link {
    grid-template-columns: 72px 1fr;
    gap: 0.85rem;
    min-height: 94px;
    padding: 0.75rem;
  }

  #ios-apps .ios-apps__media {
    width: 72px;
  }

  #contact .hero-cta {
    width: 100%;
    justify-content: center;
  }
}

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

  .cta-secondary,
  #projects .card,
  #projects .float-end .btn,
  #ios-apps .ios-apps__link,
  .achievement-proof__link {
    transition: none;
  }
}