/* ===========================================================================
   Steven Yodice-Smith — personal site
   Type: Instrument Serif (display) / IBM Plex Sans (body) / IBM Plex Mono (meta)
   =========================================================================== */

:root {
  --ink:        #0b0b0c;
  --surface:    #131315;
  --surface-2:  #191a1c;
  --text:       #edeae4;
  --muted:      #8f8b83;
  --line:       rgba(237, 234, 228, 0.11);
  --line-soft:  rgba(237, 234, 228, 0.055);
  --accent:     #e3b35f;
  --accent-dim: rgba(227, 179, 95, 0.14);
  --glow-a:     rgba(227, 179, 95, 0.10);
  --glow-b:     rgba(120, 150, 190, 0.07);
  --grain:      0.035;

  --serif: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --sans:  'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono:  'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --pad: clamp(1.25rem, 5vw, 4.5rem);
  --max: 68rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme='light'] {
  --ink:        #f4f1ea;
  --surface:    #fffdf8;
  --surface-2:  #faf6ee;
  --text:       #171614;
  --muted:      #5f5c55;   /* 5.91:1 on --ink */
  --line:       rgba(23, 22, 20, 0.13);
  --line-soft:  rgba(23, 22, 20, 0.07);
  --accent:     #8a5a12;   /* 5.24:1 on --ink */
  --accent-dim: rgba(138, 90, 18, 0.11);
  --glow-a:     rgba(138, 90, 18, 0.09);
  --glow-b:     rgba(90, 120, 165, 0.07);
  --grain:      0.022;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  /* sticky tab bar must never land on top of the content it scrolls to */
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}

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

a { color: inherit; }

/* one visible focus ring for every interactive element, never removed */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 40;
  padding: 0.7rem 1.1rem;
  background: var(--accent);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 999px;
  transform: translateY(-160%);
  transition: transform 0.25s var(--ease);
}
.skip-link:focus-visible { transform: none; }

.mono {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* --- atmosphere ---------------------------------------------------------- */

.grain {
  position: fixed;
  inset: -50%;
  z-index: 0;
  pointer-events: none;
  opacity: var(--grain);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
}

.glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(52rem 30rem at 12% -8%, var(--glow-a), transparent 68%),
    radial-gradient(44rem 28rem at 92% 8%, var(--glow-b), transparent 66%);
}

.shell {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad) 5rem;
}

/* --- theme toggle -------------------------------------------------------- */

.theme-toggle {
  position: fixed;
  top: 1.4rem;
  right: 1.4rem;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 44px;
  padding: 0.45rem 1rem 0.45rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  backdrop-filter: blur(10px);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.3s, border-color 0.3s, transform 0.3s var(--ease);
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent); transform: translateY(-1px); }
.theme-toggle__dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* --- hero ---------------------------------------------------------------- */

.hero {
  padding: clamp(5rem, 14vh, 9rem) 0 clamp(2.5rem, 6vh, 4rem);
  border-bottom: 1px solid var(--line-soft);
}

.hero__kicker {
  margin: 0 0 1.4rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.hero__kicker::before {
  content: '';
  width: 2.2rem;
  height: 1px;
  background: var(--accent);
}

.hero__name {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(3.1rem, 11vw, 7.5rem);
  line-height: 0.94;
  letter-spacing: -0.02em;
}
.hero__name em {
  display: block;
  font-style: italic;
  color: var(--muted);
  padding-left: 0.06em;
}
.hero__name em::after {
  content: '.';
  color: var(--accent);
}

.hero__tagline {
  max-width: 42ch;
  margin: 1.9rem 0 0;
  font-size: clamp(1rem, 1.6vw, 1.14rem);
  color: color-mix(in srgb, var(--text) 82%, transparent);
}

.hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  margin-top: 2.4rem;
}

.hero__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;    /* touch target */
  padding: 0.6rem 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.25s;
}
.hero__link span.mono { font-size: 0.62rem; color: var(--accent); opacity: 0.75; }
.hero__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0.65rem;   /* sits just under the text, not the touch target */
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease);
}
.hero__link:hover { color: var(--text); }
.hero__link:hover::after { transform: scaleX(1); transform-origin: left; }

.hero__resume {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
}
.hero__resume::after { display: none; }
.hero__resume:hover { border-color: var(--accent); background: var(--accent-dim); }

/* --- tab bar ------------------------------------------------------------- */

.tabbar {
  position: sticky;
  top: 0;
  z-index: 10;
  margin: 0 calc(var(--pad) * -1);
  padding: 0 var(--pad);
  background: color-mix(in srgb, var(--ink) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line-soft);
}

.tabbar__inner { overflow-x: auto; scrollbar-width: none; }
.tabbar__inner::-webkit-scrollbar { display: none; }

.tabs {
  position: relative;
  display: flex;
  gap: 0.35rem;
  width: max-content;
  min-width: 100%;
  padding: 0.85rem 0;
}

.tab {
  position: relative;
  z-index: 1;
  appearance: none;
  border: 0;
  background: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;   /* touch target */
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.28s var(--ease);
}
.tab:hover { color: var(--text); }
.tab[aria-selected='true'] { color: var(--ink); }
html[data-theme='light'] .tab[aria-selected='true'] { color: var(--surface); }
.tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.tabs__indicator {
  position: absolute;
  top: 0.85rem;
  left: 0;
  height: calc(100% - 1.7rem);
  border-radius: 999px;
  background: var(--accent);
  transition: transform 0.38s var(--ease), width 0.38s var(--ease);
  will-change: transform, width;
}
.tabs__indicator[data-ready='false'] { opacity: 0; }

/* --- panels -------------------------------------------------------------- */

.panel { padding: clamp(2.5rem, 7vh, 4.5rem) 0 0; }
.panel[hidden] { display: none; }

.panel__note {
  margin: 0 0 2.8rem;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 1.25rem;
  font-style: italic;
}

.entry {
  position: relative;
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 0 1.5rem;
  padding: 2.2rem 0 2.4rem;
  border-top: 1px solid var(--line-soft);
}
.entry:first-of-type { border-top: 0; padding-top: 0; }

.entry__index {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  padding-top: 0.55rem;
  opacity: 0.55;
  transition: color 0.3s, opacity 0.3s;
}
.entry:hover .entry__index { color: var(--accent); opacity: 1; }

.entry__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.2rem 1.5rem;
}

.entry__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 3.2vw, 2.05rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.entry__meta {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.entry__subtitle {
  margin: 0.5rem 0 0;
  color: color-mix(in srgb, var(--text) 70%, transparent);
  font-size: 0.95rem;
}

.entry__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}

.tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.24rem 0.7rem;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.entry:hover .tag { border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.tag:hover { color: var(--text); background: var(--accent-dim); }

.entry__points {
  margin: 1.3rem 0 0;
  padding: 0;
  list-style: none;
  max-width: 68ch;
}
.entry__points li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.7rem;
  color: color-mix(in srgb, var(--text) 88%, transparent);
  font-size: 0.95rem;
}
.entry__points li:last-child { margin-bottom: 0; }
.entry__points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.55rem;
  height: 1px;
  background: var(--accent);
  opacity: 0.7;
}

.entry__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 1.4rem;
}
.entry__link {
  min-height: 44px;    /* touch target */
  padding: 0.5rem 0;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.entry__link svg { transition: transform 0.3s var(--ease); }
.entry__link:hover svg { transform: translate(2px, -2px); }

/* --- footer -------------------------------------------------------------- */

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 5rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
}
.footer__hint { opacity: 0.55; }

/* --- motion -------------------------------------------------------------- */

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.hero__kicker,
.hero__name,
.hero__tagline,
.hero__links {
  animation: rise 0.9s var(--ease) both;
}
.hero__name    { animation-delay: 0.06s; }
.hero__tagline { animation-delay: 0.14s; }
.hero__links   { animation-delay: 0.22s; }

.panel[data-animate='true'] .panel__note,
.panel[data-animate='true'] .entry {
  animation: rise 0.65s var(--ease) both;
  animation-delay: calc(var(--i, 0) * 70ms);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- responsive ---------------------------------------------------------- */

@media (max-width: 640px) {
  .entry { grid-template-columns: 1fr; gap: 0; }
  .entry__index { padding-top: 0; margin-bottom: 0.6rem; }
  .entry__meta { white-space: normal; }
  .tab { padding: 0.5rem 0.72rem; letter-spacing: 0.08em; }
  .theme-toggle { top: auto; bottom: 1rem; right: 1rem; }
  .footer__hint { display: none; }
}

@media print {
  .theme-toggle, .glow, .grain, .tabbar { display: none !important; }
  .panel[hidden] { display: block !important; }
  body { background: #fff; color: #000; }
}