/* =========================================================
   Steve Appeltants — Portfolio
   "Systems Index" — editorial / technical / paper
   ========================================================= */

:root {
  --paper:      #F3EFE6;
  --surface:    #FAF7F0;
  --ink:        #15140F;
  --ink-soft:   #3A382F;
  --muted:      #6E6A5C;
  --faint:      #A6A092;
  --hairline:   rgba(21, 20, 15, 0.16);
  --hairline-2: rgba(21, 20, 15, 0.08);
  --accent:     #1F39D6;
  --accent-ink: #1730B8;
  --paper-rgb:  243, 239, 230;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --grotesk: "Space Grotesk", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --maxw: 1180px;
  --pad: clamp(20px, 5vw, 72px);
  --rule: 1px solid var(--hairline);
}

[data-theme="dark"] {
  --paper:      #100F0C;
  --surface:    #17150F;
  --ink:        #EFEBDF;
  --ink-soft:   #C9C4B6;
  --muted:      #8E897A;
  --faint:      #5E5A4E;
  --hairline:   rgba(239, 235, 223, 0.16);
  --hairline-2: rgba(239, 235, 223, 0.07);
  --accent:     #6E86FF;
  --accent-ink: #92A4FF;
  --paper-rgb:  16, 15, 12;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.5s ease, color 0.5s ease;
}

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

a { color: inherit; }

/* ---- shared atoms ------------------------------------------------- */

.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad); }

.mono {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.idx { color: var(--accent); }

.grotesk { font-family: var(--grotesk); }

/* progress bar */
#progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: var(--accent); z-index: 120;
  transition: width 0.1s linear;
}

/* ---- top nav ------------------------------------------------------ */

header.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(var(--paper-rgb), 0.82);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  border-bottom: var(--rule);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px; gap: 24px;
}
.brand {
  font-family: var(--grotesk); font-weight: 700; font-size: 0.95rem;
  letter-spacing: -0.01em; text-decoration: none; display: flex; gap: 10px; align-items: center;
}
.brand .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); display: inline-block; }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  text-decoration: none; color: var(--muted); padding: 4px 0; position: relative;
  transition: color 0.2s ease;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--accent); transition: width 0.25s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active::after { width: 100%; }
.nav-links a.num::before { content: attr(data-n) " "; color: var(--accent); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

/* hamburger — hidden on desktop */
.menu-toggle {
  display: none; width: 42px; height: 38px; padding: 0;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  background: none; border: var(--rule); border-radius: 2px; cursor: pointer;
  transition: border-color 0.2s ease;
}
.menu-toggle span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.28s cubic-bezier(.2,.6,.2,1), opacity 0.18s ease; }
.menu-toggle:hover { border-color: var(--accent); }
.menu-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 760px) {
  .menu-toggle { display: inline-flex; }
  .nav-links {
    position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(var(--paper-rgb), 0.97);
    backdrop-filter: blur(14px) saturate(1.1);
    -webkit-backdrop-filter: blur(14px) saturate(1.1);
    border-bottom: var(--rule);
    padding: 6px var(--pad) 18px;
    max-height: 0; overflow: hidden; opacity: 0; pointer-events: none;
    transition: max-height 0.32s ease, opacity 0.22s ease;
  }
  .nav-links.open { max-height: 80vh; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 16px 2px; font-size: 0.82rem; color: var(--ink); border-top: var(--hairline-2) 1px solid; }
  .nav-links a:first-child { border-top: none; }
  .nav-links a::after { display: none; }
  .nav-links a.cta { margin-top: 12px; color: #fff; background: var(--accent); border-radius: 2px; padding: 14px 16px; text-align: center; }
}
[data-theme="dark"] .nav-links a.cta { color: #0c0b08; }

.theme-toggle {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase;
  background: none; border: var(--rule); color: var(--ink);
  padding: 7px 12px; cursor: pointer; border-radius: 2px; display: flex; align-items: center; gap: 8px;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ---- section scaffolding ----------------------------------------- */

section { border-top: var(--rule); }
section:first-of-type { border-top: none; }

.sec {
  display: grid; grid-template-columns: 220px 1fr; gap: clamp(24px, 5vw, 72px);
  padding-block: clamp(56px, 8vw, 116px);
}
@media (max-width: 880px) { .sec { grid-template-columns: 1fr; gap: 28px; } }

.sec-head { position: sticky; top: 88px; align-self: start; }
@media (max-width: 880px) { .sec-head { position: static; } }
.sec-head .label {
  font-family: var(--grotesk); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em;
  margin-top: 8px; color: var(--ink);
}
.sec-head .note { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em; color: var(--faint); margin-top: 12px; line-height: 1.7; text-transform: uppercase; }

/* reveal */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s cubic-bezier(.2,.6,.2,1), transform 0.7s cubic-bezier(.2,.6,.2,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* =========================================================
   HERO
   ========================================================= */
.hero { padding-block: clamp(48px, 9vw, 120px) clamp(40px, 7vw, 96px); }
.hero-top { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 12px; }
.hero-top .meta { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }

.hero h1 {
  font-family: var(--grotesk); font-weight: 700;
  font-size: clamp(3rem, 12vw, 9.5rem); line-height: 0.92; letter-spacing: -0.04em;
  margin: 0.32em 0 0; color: var(--ink);
}
.hero h1 .l2 { display: block; }
.hero h1 em { font-style: normal; color: var(--accent); }

.hero-sub {
  display: grid; grid-template-columns: 1fr; gap: 28px; margin-top: clamp(28px, 4vw, 48px);
  border-top: var(--rule); padding-top: 28px;
}
@media (min-width: 760px) { .hero-sub { grid-template-columns: 1.4fr 1fr; gap: clamp(32px, 6vw, 80px); } }

.hero-role { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 14px; }
.hero-bio { font-size: clamp(1.05rem, 2vw, 1.32rem); line-height: 1.55; color: var(--ink-soft); max-width: 34ch; }
.hero-bio b { font-weight: 600; color: var(--ink); }

.status { display: flex; flex-direction: column; gap: 14px; }
.status .row { display: flex; gap: 14px; align-items: baseline; font-family: var(--mono); font-size: 0.74rem; }
.status .row .k { color: var(--faint); letter-spacing: 0.08em; text-transform: uppercase; min-width: 84px; }
.status .row .v { color: var(--ink); }
.status .live { display: inline-flex; align-items: center; gap: 8px; }
.status .pulse { width: 8px; height: 8px; border-radius: 50%; background: #2B9d6b; box-shadow: 0 0 0 0 rgba(43,157,107,0.5); animation: pulse 2.2s infinite; }
[data-theme="dark"] .status .pulse { background: #46cf90; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(43,157,107,0.5);} 70%{box-shadow:0 0 0 7px rgba(43,157,107,0);} 100%{box-shadow:0 0 0 0 rgba(43,157,107,0);} }
@media (prefers-reduced-motion: reduce){ .status .pulse{ animation: none; } }

.hero-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: clamp(32px, 5vw, 52px); }
.btn {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.06em; text-transform: uppercase;
  text-decoration: none; padding: 12px 18px; border: var(--rule); border-radius: 2px;
  display: inline-flex; align-items: center; gap: 9px; color: var(--ink);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn:hover { transform: translateY(-2px); border-color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
[data-theme="dark"] .btn.primary { color: #0c0b08; }
.btn.primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.btn svg { width: 15px; height: 15px; }

/* =========================================================
   WORK — indexed project rows
   ========================================================= */
.work-list { display: flex; flex-direction: column; }
.proj {
  display: grid; grid-template-columns: 48px 1fr auto; gap: 20px; align-items: start;
  padding: 28px 4px; border-top: var(--rule); text-decoration: none; color: inherit;
  transition: padding-left 0.3s ease;
}
.proj:first-child { border-top: none; }
.proj:hover { padding-left: 14px; }
.proj .pnum { font-family: var(--mono); font-size: 0.74rem; color: var(--faint); padding-top: 6px; }
.proj:hover .pnum { color: var(--accent); }
.proj .ptitle { font-family: var(--grotesk); font-weight: 600; font-size: clamp(1.4rem, 3.2vw, 2.3rem); letter-spacing: -0.02em; line-height: 1.04; }
.proj .ptag { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 10px; display: block; }
.proj .pdesc { font-size: 1rem; line-height: 1.5; color: var(--ink-soft); max-width: 52ch; margin: 12px 0 14px; }
.proj .stack { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  font-family: var(--mono); font-size: 0.63rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted); border: var(--rule); border-radius: 99px; padding: 4px 11px; white-space: nowrap;
}
.proj-right { text-align: right; font-family: var(--mono); font-size: 0.7rem; color: var(--muted); white-space: nowrap; padding-top: 6px; display: flex; flex-direction: column; gap: 6px; align-items: flex-end; }
.proj .arrow { color: var(--faint); transition: transform 0.3s ease, color 0.3s ease; }
.proj:hover .arrow { transform: translate(4px,-4px); color: var(--accent); }
@media (max-width: 620px) {
  .proj { grid-template-columns: 1fr; gap: 10px; }
  .proj-right { text-align: left; align-items: flex-start; flex-direction: row; gap: 14px; }
}

/* =========================================================
   EXPERIENCE / TIMELINE
   ========================================================= */
.tl { display: flex; flex-direction: column; }
.tl-item { display: grid; grid-template-columns: 140px 1fr; gap: 24px; padding: 26px 0; border-top: var(--rule); }
.tl-item:first-child { border-top: none; }
.tl-when { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--muted); padding-top: 5px; }
.tl-role { font-family: var(--grotesk); font-weight: 600; font-size: 1.3rem; letter-spacing: -0.01em; }
.tl-org { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-ink); margin: 6px 0 12px; }
.tl-body { color: var(--ink-soft); font-size: 1rem; line-height: 1.55; max-width: 56ch; }
.tl-body ul { margin: 12px 0 0; padding: 0; list-style: none; }
.tl-body li { position: relative; padding-left: 20px; margin-bottom: 7px; }
.tl-body li::before { content: "—"; position: absolute; left: 0; color: var(--accent); }
@media (max-width: 620px) { .tl-item { grid-template-columns: 1fr; gap: 8px; } }

/* =========================================================
   CAPABILITIES
   ========================================================= */
.caps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; }
@media (max-width: 620px) { .caps { grid-template-columns: 1fr; } }
.cap { padding: 24px 0; border-top: var(--rule); }
.caps .cap:nth-child(odd) { padding-right: 28px; }
.caps .cap:nth-child(even) { padding-left: 28px; border-left: var(--rule); }
@media (max-width: 620px) { .caps .cap:nth-child(even) { padding-left: 0; border-left: none; } }
.cap h3 { font-family: var(--grotesk); font-weight: 600; font-size: 1.02rem; margin: 0 0 14px; letter-spacing: -0.01em; }
.cap h3 .c-idx { font-family: var(--mono); font-size: 0.7rem; color: var(--accent); margin-right: 10px; }
.cap .tags { display: flex; flex-wrap: wrap; gap: 7px; }

/* =========================================================
   APPROACH
   ========================================================= */
.principles { display: grid; grid-template-columns: 1fr; gap: 0; }
.principle { padding: 26px 0; border-top: var(--rule); display: grid; grid-template-columns: 64px 1fr; gap: 22px; }
.principle:first-child { border-top: none; }
.principle .pn { font-family: var(--mono); font-size: 0.78rem; color: var(--accent); padding-top: 7px; }
.principle h3 { font-family: var(--grotesk); font-weight: 600; font-size: clamp(1.3rem, 2.6vw, 1.7rem); margin: 0 0 8px; letter-spacing: -0.015em; }
.principle p { margin: 0; color: var(--ink-soft); font-size: 1.02rem; line-height: 1.55; max-width: 56ch; }
@media (max-width: 620px) { .principle { grid-template-columns: 1fr; gap: 8px; } }

/* =========================================================
   EDUCATION + LANGUAGES (side by side blocks)
   ========================================================= */
.edu-item { padding: 22px 0; border-top: var(--rule); }
.edu-item:first-child { border-top: none; }
.edu-deg { font-family: var(--grotesk); font-weight: 600; font-size: 1.2rem; letter-spacing: -0.01em; }
.edu-spec { color: var(--accent-ink); font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; margin: 6px 0; }
.edu-meta { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); }

.langs { display: flex; flex-direction: column; gap: 0; margin-top: 8px; }
.lang { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 13px 0; border-top: var(--hairline-2) 1px solid; }
.lang:first-child { border-top: none; }
.lang .ln { font-family: var(--grotesk); font-weight: 500; font-size: 1.05rem; }
.lang .ll { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.lang .bar { flex: 1; height: 1px; background: var(--hairline); margin: 0 4px; position: relative; }

/* =========================================================
   CONTACT / FOOTER
   ========================================================= */
.contact { padding-block: clamp(64px, 10vw, 140px); border-top: var(--rule); }
.contact h2 { font-family: var(--grotesk); font-weight: 700; font-size: clamp(2.4rem, 8vw, 6rem); letter-spacing: -0.035em; line-height: 0.95; margin: 0; }
.contact .lead { color: var(--ink-soft); font-size: clamp(1.1rem, 2.4vw, 1.5rem); max-width: 42ch; margin: 22px 0 36px; line-height: 1.5; }
.contact-grid { display: flex; flex-wrap: wrap; gap: 10px; }

footer.foot { border-top: var(--rule); padding-block: 30px; }
.foot-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px; font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em; color: var(--muted); text-transform: uppercase; }
.foot-inner a { color: var(--muted); text-decoration: none; transition: color 0.2s; }
.foot-inner a:hover { color: var(--accent); }

/* utility */
.col-2 { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(28px, 5vw, 64px); }
@media (max-width: 760px) { .col-2 { grid-template-columns: 1fr; gap: 36px; } }
.block-label { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin-bottom: 16px; }

/* ---- community / civic ---- */
.civic-head { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.civic-org { font-family: var(--grotesk); font-weight: 600; font-size: clamp(1.4rem, 3vw, 2rem); letter-spacing: -0.02em; }
.civic-when { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; color: var(--muted); }
.civic-desc { color: var(--ink-soft); font-size: 1.02rem; line-height: 1.55; max-width: 60ch; margin: 14px 0 0; }
.civic-projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); margin-top: 26px; }
.civic-projects a { background: var(--paper); padding: 20px 22px; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 8px; transition: background 0.2s ease; }
.civic-projects a:hover { background: var(--surface); }
.civic-projects .cn { font-family: var(--grotesk); font-weight: 600; font-size: 1.02rem; letter-spacing: -0.01em; display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.civic-projects .cn .ar { color: var(--faint); transition: transform 0.25s ease, color 0.25s ease; }
.civic-projects a:hover .cn .ar { color: var(--accent); transform: translate(3px, -3px); }
.civic-projects .cd { font-size: 0.92rem; color: var(--ink-soft); line-height: 1.45; }
@media (max-width: 620px) { .civic-projects { grid-template-columns: 1fr; } }
.civic-sub { margin-top: 40px; padding-top: 26px; border-top: var(--rule); }