/* QSOE Systems — shared styles */

:root {
  --sky-top:   #93c6ea;
  --sky-mid:   #bfe0f5;
  --sky-bot:   #e9f5fc;
  --ink:       #14283a;
  --ink-soft:  #3c5266;
  --accent:    #0e7c93;
  --accent-deep: #0a5d6f;
  --panel:     rgba(255, 255, 255, 0.64);
  --panel-edge: rgba(255, 255, 255, 0.85);
  --shadow:    rgba(18, 52, 82, 0.20);
  --code-bg:   rgba(14, 124, 147, 0.10);

  --font-display: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --font-body:    "IBM Plex Sans", -apple-system, "Segoe UI", Helvetica, sans-serif;
  --font-mono:    "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  line-height: 1.62;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(255,255,255,0.65), rgba(255,255,255,0) 55%),
    linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 38%, var(--sky-bot) 100%);
  background-attachment: fixed;
  position: relative;
  overflow-x: hidden;
}

/* soft drifting clouds — decorative, very subtle */
.sky-cloud {
  position: fixed;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.85), rgba(255,255,255,0) 70%);
  filter: blur(8px);
  pointer-events: none;
  z-index: 0;
}
.sky-cloud.c1 { width: 340px; height: 120px; top: 12%; left: -80px; opacity: 0.55;
  animation: drift1 90s linear infinite; }
.sky-cloud.c2 { width: 260px; height: 90px;  top: 30%; right: -60px; opacity: 0.40;
  animation: drift2 120s linear infinite; }
@keyframes drift1 { from { transform: translateX(0); } to { transform: translateX(60vw); } }
@keyframes drift2 { from { transform: translateX(0); } to { transform: translateX(-50vw); } }

.wrap {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(2.2rem, 6vw, 4.5rem) 1.4rem 4rem;
}

/* ---- header ---- */
.site-head { text-align: center; }
.emblem {
  display: block;
  width: clamp(64px, 14vw, 84px);
  height: auto;
  margin: 0 auto 0.7rem;
}
.site-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 8vw, 4rem);
  letter-spacing: 0.01em;
  margin: 0;
  color: var(--ink);
  text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}
.site-title a { color: inherit; text-decoration: none; }
.site-tag {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin: 0.5rem 0 0;
  opacity: 0.85;
}

/* ---- tab nav ---- */
.tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 0.9rem;
  margin: 2rem 0 0;
  padding: 0;
}
.tab {
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--accent-deep);
  text-decoration: none;
  padding: 0.35rem 0.2rem;
  border: 0;
  background: none;
  cursor: pointer;
  transition: color 0.15s ease, transform 0.15s ease;
}
.tab::before { content: "[ "; color: var(--accent); opacity: 0.55; }
.tab::after  { content: " ]"; color: var(--accent); opacity: 0.55; }
.tab:hover { color: var(--accent); transform: translateY(-1px); }
.tab:hover::before, .tab:hover::after { opacity: 1; }
.tab[aria-selected="true"] {
  color: var(--ink);
  font-weight: 500;
}
.tab[aria-selected="true"]::before,
.tab[aria-selected="true"]::after { opacity: 1; color: var(--accent-deep); }

/* ---- panel ---- */
.panels { margin-top: 2.2rem; }
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 16px;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  box-shadow: 0 18px 50px -22px var(--shadow);
  -webkit-backdrop-filter: blur(9px);
  backdrop-filter: blur(9px);
}
/* progressive enhancement: only hide panels once JS is active */
body.js .panel { display: none; }
body.js .panel.is-active { display: block; animation: panelIn 0.4s ease both; }
@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

.panel h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.7rem;
  margin: 0 0 0.2rem;
}
.panel .lead {
  font-size: 1.08rem;
  color: var(--ink);
  margin: 0.2rem 0 1.4rem;
}
.panel h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin: 2rem 0 0.8rem;
  border-top: 1px solid rgba(14,124,147,0.18);
  padding-top: 1.3rem;
}
.panel p { margin: 0 0 1rem; color: var(--ink-soft); }
.panel a { color: var(--accent-deep); text-decoration: underline; text-underline-offset: 2px; }
.panel a:hover { color: var(--accent); }

code, .mono { font-family: var(--font-mono); font-size: 0.9em; }
.panel code {
  background: var(--code-bg);
  color: var(--accent-deep);
  padding: 0.08em 0.36em;
  border-radius: 5px;
}

ul.tidy { list-style: none; margin: 0; padding: 0; }
ul.tidy li { padding: 0.32rem 0; color: var(--ink-soft); }
ul.tidy li::before { content: "› "; color: var(--accent); font-family: var(--font-mono); }

.project-list { list-style: none; margin: 0; padding: 0; }
.project-list li { padding: 0.4rem 0; }
.project-list .name { font-family: var(--font-mono); font-weight: 500; }
.project-list .desc { color: var(--ink-soft); }

.meta-row {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.4rem;
  font-family: var(--font-mono); font-size: 0.85rem;
  color: var(--accent-deep); margin-top: 1.4rem;
}

.contact-mail {
  font-family: var(--font-mono);
  font-size: 1.15rem;
}

footer {
  text-align: center;
  margin-top: 2.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-deep);
  opacity: 0.75;
}

/* ---- sub-pages ---- */
.subpage .panel { display: block; }
.back-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-top: 1.6rem;
  color: var(--accent-deep);
  text-decoration: none;
}
.back-link::before { content: "‹ "; }
.back-link:hover { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  .sky-cloud { animation: none; }
  body.js .panel.is-active { animation: none; }
  .tab { transition: none; }
}