/* ========================================================
   xCloudinfo Projects Showcase — Shared Design System
   v3 — Redesigned for Human Visual Reading Comfort
   ======================================================== */

/* ── Variables ── */
:root {
  /* ── Backgrounds (layered warm neutrals)
      bg1 = page canvas · bg2 = card/panel (pure white stands out against canvas)
      bg3 = subtle inset · bg4 = hover state · bg5 = deep accent bg          */
  --bg1: #f2ede9;   /* warm parchment canvas */
  --bg2: #ffffff;   /* card & modal — pure white for clear separation */
  --bg3: #f8f4f1;   /* panel tint */
  --bg4: #ece5df;   /* hover / pressed */
  --bg5: #e2d8d0;   /* deep accent background */

  /* ── Borders */
  --border:    #ddd4cb;
  --border-lt: #c9bdb4;

  /* ── Text  (warm neutrals, all WCAG AA+ contrast)
      text1 = body   7:1+ on bg2
      text2 = secondary / captions   ~6:1 on bg2
      text3 = meta / labels   ~4.5:1 on bg2, use ≥14px only               */
  --text1: #1a120e;   /* rich warm near-black */
  --text2: #4a3028;   /* readable warm brown */
  --text3: #7c5a50;   /* muted warm — large text only */

  /* ── Brand accent (xCloud terracotta — 4.8:1 on white ✓ WCAG AA) */
  --blue:   #c14a2e;
  --blue-d: rgba(193,74,46,.12);

  /* ── Semantic palette */
  --green:  #16a34a;  --green-d:  rgba(22,163,74,.12);
  --amber:  #d97706;  --amber-d:  rgba(217,119,6,.12);
  --red:    #dc2626;  --red-d:    rgba(220,38,38,.12);
  --purple: #7c3aed;  --purple-d: rgba(124,58,237,.12);
  --cyan:   #0891b2;  --cyan-d:   rgba(8,145,178,.12);
  --pink:   #db2777;  --pink-d:   rgba(219,39,119,.12);
  --teal:   #0d9488;  --teal-d:   rgba(13,148,136,.12);

  /* ── Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 22px;

  /* ── Elevation */
  --shadow:    0 2px 12px rgba(60,30,15,.09), 0 8px 32px rgba(60,30,15,.07);
  --shadow-sm: 0 1px 4px  rgba(60,30,15,.07), 0 4px 16px rgba(60,30,15,.05);
  --shadow-lg: 0 4px 20px rgba(60,30,15,.11), 0 16px 56px rgba(60,30,15,.09);

  --transition: .18s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ── Body — 17px base, 1.72 leading (golden ratio) ── */
body {
  background: var(--bg1);
  color: var(--text1);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC',
               'PingFang TC', 'Helvetica Neue', sans-serif;
  font-size: 17px;
  line-height: 1.72;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a    { color: inherit; text-decoration: none; }
img  { display: block; max-width: 100%; }
button { cursor: pointer; font: inherit; border: none; background: none; }

/* ── Typography — modular scale ×1.25 ── */
h1 { font-size: clamp(34px, 4.5vw, 58px);  font-weight: 800; line-height: 1.12; letter-spacing: -.02em; }
h2 { font-size: clamp(26px, 3.5vw, 42px);  font-weight: 700; line-height: 1.22; letter-spacing: -.01em; }
h3 { font-size: clamp(20px, 2.4vw, 28px);  font-weight: 600; line-height: 1.32; }
h4 { font-size: 18px; font-weight: 600; line-height: 1.4; }
p  { color: var(--text2); }
code, pre { font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace; }

/* ── NAV ── */
.nav {
  position: sticky; top: 0; z-index: 200;
  background: rgba(242,237,233,.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1360px; margin: 0 auto;
  display: flex; align-items: center; gap: 14px;
  padding: 0 28px; height: 80px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0; cursor: pointer;
}
.nav-logo-mark {
  width: 36px; height: 36px; border-radius: 9px;
  background: linear-gradient(135deg, #c14a2e, #8a2812);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px; color: #fff; letter-spacing: -.5px;
}
.nav-logo-text { font-weight: 700; font-size: 17px; }
.nav-logo-text span { color: var(--blue); }
.nav-back {
  display: flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--text2);
  padding: 6px 12px; border-radius: var(--r-sm);
  transition: var(--transition);
  border: 1px solid transparent;
}
.nav-back:hover { color: var(--text1); border-color: var(--border-lt); background: var(--bg3); }
.nav-back svg { flex-shrink: 0; }
.nav-spacer { flex: 1; }
.nav-links { display: flex; gap: 4px; }
.nav-link {
  padding: 7px 16px; border-radius: var(--r-sm);
  font-size: 15px; color: var(--text2);
  transition: var(--transition);
}
.nav-link:hover { color: var(--text1); background: var(--bg3); }
.nav-link.active { color: var(--text1); background: var(--bg4); font-weight: 500; }
.nav-badge {
  display: inline-block;
  background: var(--blue); color: #fff;
  border-radius: 10px; padding: 1px 8px;
  font-size: 12px; margin-left: 5px;
}
.nav-cta {
  padding: 8px 18px; border-radius: var(--r-sm);
  background: var(--blue); color: #fff;
  font-size: 14px; font-weight: 600;
  transition: var(--transition); flex-shrink: 0;
}
.nav-cta:hover { background: #a33d24; transform: translateY(-1px); }

/* ── PAGE WRAPPER ── */
.page { max-width: 1360px; margin: 0 auto; padding: 0 28px; }

/* ── HERO (subpage) ── */
.hero-sub {
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: start;
}
.hero-sub-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--bg3); border: 1px solid var(--border-lt);
  border-radius: 24px; padding: 6px 16px;
  font-size: 13px; color: var(--text2);
  margin-bottom: 18px;
}
.hero-sub-badge .dot { width: 8px; height: 8px; border-radius: 50%; }
.hero-sub h1 { margin-bottom: 14px; }
.hero-sub p  { font-size: 19px; max-width: 660px; margin-bottom: 28px; }
.hero-sub-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.meta-chip {
  display: flex; align-items: center; gap: 6px;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 24px; padding: 5px 14px;
  font-size: 13px; color: var(--text2);
}
.hero-sub-visual {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 22px;
  min-width: 270px; flex-shrink: 0;
}

/* ── SECTION ── */
.section { padding: 56px 0; }
.section-header {
  display: flex; align-items: baseline; gap: 14px;
  margin-bottom: 32px;
}
.section-label {
  display: inline-block;
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em;
  color: var(--blue); margin-bottom: 10px;
}
.section-title { font-size: 22px; font-weight: 700; }
.section-sub    { font-size: 15px; color: var(--text3); margin-top: 6px; }
.section-divider { height: 1px; background: var(--border); margin: 56px 0; }

/* ── GRID ── */
.grid-2    { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.grid-3    { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.grid-4    { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 22px; }
@media(max-width:900px) { .grid-3,.grid-4 { grid-template-columns: repeat(2,1fr); } }
@media(max-width:600px) { .grid-2,.grid-3,.grid-4 { grid-template-columns: 1fr; } }

/* ── CARD ── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative; overflow: hidden;
}
.card:hover {
  border-color: var(--border-lt);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.card-sm { padding: 18px; }
.card-accent-top::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--card-color, var(--blue));
  opacity: 0; transition: opacity var(--transition);
}
.card:hover .card-accent-top::before,
.card.active .card-accent-top::before { opacity: 1; }

/* ── STAT CARD ── */
.stat {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--r-md); padding: 22px; text-align: center;
}
.stat-num   { font-size: 36px; font-weight: 800; line-height: 1; margin-bottom: 5px; }
.stat-label { font-size: 14px; color: var(--text2); }

/* ── BUTTON ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--r-sm);
  font-size: 15px; font-weight: 600;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn-primary  { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #a33d24; transform: translateY(-1px); box-shadow: 0 4px 18px rgba(193,74,46,.3); }
.btn-secondary { background: var(--bg3); color: var(--text1); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--border-lt); background: var(--bg4); }
.btn-ghost  { color: var(--text2); }
.btn-ghost:hover { color: var(--text1); background: var(--bg3); }
.btn-sm     { padding: 7px 14px; font-size: 14px; }
.btn-lg     { padding: 14px 28px; font-size: 17px; }
.btn-icon   { padding: 9px; border-radius: var(--r-sm); }

/* ── BADGE ── */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 11px; border-radius: 20px;
  font-size: 12px; font-weight: 600;
  letter-spacing: .02em;
}
.badge-blue   { background: var(--blue-d);   color: var(--blue);   border: 1px solid rgba(193,74,46,.25); }
.badge-green  { background: var(--green-d);  color: var(--green);  border: 1px solid rgba(22,163,74,.25); }
.badge-amber  { background: var(--amber-d);  color: var(--amber);  border: 1px solid rgba(217,119,6,.25); }
.badge-red    { background: var(--red-d);    color: var(--red);    border: 1px solid rgba(220,38,38,.25); }
.badge-purple { background: var(--purple-d); color: var(--purple); border: 1px solid rgba(124,58,237,.25); }
.badge-cyan   { background: var(--cyan-d);   color: var(--cyan);   border: 1px solid rgba(8,145,178,.25); }
.badge-pink   { background: var(--pink-d);   color: var(--pink);   border: 1px solid rgba(219,39,119,.25); }
.badge-teal   { background: var(--teal-d);   color: var(--teal);   border: 1px solid rgba(13,148,136,.25); }

/* ── TAG (tech stack chips) ── */
.tag {
  display: inline-block;
  background: var(--bg4); border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 4px 10px; font-size: 13px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  color: var(--text2);
  line-height: 1.4;
}

/* ── PROGRESS ── */
.progress { height: 6px; background: var(--bg4); border-radius: 3px; overflow: hidden; }
.progress-bar { height: 100%; border-radius: 3px; transition: width 1s ease; }

/* ── STATUS DOT ── */
.status-dot {
  display: inline-block; width: 8px; height: 8px;
  border-radius: 50%; flex-shrink: 0;
}
.dot-green { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot-amber { background: var(--amber); box-shadow: 0 0 6px var(--amber); }
.dot-blue  { background: var(--blue);  box-shadow: 0 0 6px var(--blue);  }
.dot-red   { background: var(--red);   box-shadow: 0 0 6px var(--red);   }

/* ── TAB ── */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 28px; }
.tab {
  padding: 11px 18px; font-size: 15px; font-weight: 500;
  color: var(--text2); cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px; transition: var(--transition);
}
.tab:hover      { color: var(--text1); }
.tab.active     { color: var(--blue); border-bottom-color: var(--blue); }
.tab-panel      { display: none; }
.tab-panel.active { display: block; }

/* ── FEATURE ROW ── */
.feature-row {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.feature-row:last-child { border-bottom: none; }
.feature-icon {
  width: 38px; height: 38px; border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
  background: var(--bg4);
}
.feature-title { font-size: 16px; font-weight: 600; margin-bottom: 3px; }
.feature-desc  { font-size: 15px; color: var(--text2); }

/* ── ARCH BOX ── */
.arch-box {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 28px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 14px; color: var(--text2);
  overflow-x: auto; line-height: 1.9;
  white-space: pre;
}
.arch-box .hl  { color: var(--blue);   }
.arch-box .hl2 { color: var(--green);  }
.arch-box .hl3 { color: var(--amber);  }
.arch-box .hl4 { color: var(--purple); }

/* ── ROADMAP ── */
.roadmap { display: flex; flex-direction: column; gap: 0; }
.roadmap-item {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 18px 0; border-bottom: 1px solid var(--border);
}
.roadmap-item:last-child { border-bottom: none; }
.roadmap-dot-wrap {
  display: flex; flex-direction: column; align-items: center;
  padding-top: 5px;
}
.roadmap-dot   { width: 13px; height: 13px; border-radius: 50%; flex-shrink: 0; }
.roadmap-line  { width: 1px; background: var(--border); flex: 1; min-height: 16px; margin-top: 5px; }
.roadmap-content  { flex: 1; }
.roadmap-label { font-size: 12px; color: var(--text3); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 4px; }
.roadmap-title { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.roadmap-items { display: flex; flex-wrap: wrap; gap: 7px; }
.roadmap-chip  {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 20px; padding: 4px 12px; font-size: 14px; color: var(--text2);
}
/* SSDLC / security badge */
.ssdlc-badge {
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(22,163,74,.1);border:1px solid rgba(22,163,74,.3);
  border-radius:6px;padding:3px 10px;
  font-size:12px;color:var(--green);font-weight:600;
}
.ssdlc-badge-amber {
  background:rgba(217,119,6,.08);border:1px solid rgba(217,119,6,.28);
  color:var(--amber);
}
.sec-level-table { width:100%;border-collapse:collapse;font-size:13px;margin-top:10px; }
.sec-level-table td,.sec-level-table th {
  padding:6px 10px;border:1px solid var(--border);text-align:left;
}
.sec-level-table th { background:var(--bg3);font-weight:600;color:var(--text2); }

/* ── DEMO FRAME ── */
.demo-frame { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; }
.demo-toolbar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 18px; background: var(--bg3);
  border-bottom: 1px solid var(--border);
}
.demo-dots { display: flex; gap: 6px; }
.demo-dot  { width: 11px; height: 11px; border-radius: 50%; }
.demo-dot-r { background: #ef4444; } .demo-dot-y { background: #f59e0b; } .demo-dot-g { background: #22c55e; }
.demo-url {
  flex: 1; background: var(--bg4); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: 5px 12px;
  font-size: 13px; color: var(--text3);
  font-family: 'JetBrains Mono', monospace;
}
.demo-body { padding: 0; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg1); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-lt); }

/* ── ANIMATIONS ── */
@keyframes fade-up    { from { opacity:0; transform:translateY(18px); } to { opacity:1; transform:none; } }
@keyframes fade-in    { from { opacity:0; }                              to { opacity:1; } }
@keyframes pulse-dot  { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(.85)} }
@keyframes blink      { 0%,100%{opacity:1} 50%{opacity:0} }
@keyframes spin       { to { transform:rotate(360deg); } }
@keyframes shimmer    { 0%{background-position:-400px 0} 100%{background-position:400px 0} }
@keyframes slide-in-r { from{opacity:0;transform:translateX(22px)} to{opacity:1;transform:none} }
@keyframes slide-in-l { from{opacity:0;transform:translateX(-22px)} to{opacity:1;transform:none} }
@keyframes count-up   { from{opacity:0;transform:scale(.8)} to{opacity:1;transform:scale(1)} }
@keyframes flow       { 0%{stroke-dashoffset:200} 100%{stroke-dashoffset:0} }
@keyframes glow       { 0%,100%{box-shadow:0 0 4px currentColor} 50%{box-shadow:0 0 14px currentColor} }

.animate-fade-up { animation: fade-up .5s ease both; }
.animate-fade-in { animation: fade-in .4s ease both; }

/* ── FOOTER ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 36px 28px;
  max-width: 1360px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
}
.footer p { font-size: 14px; color: var(--text3); }

/* ── RESPONSIVE ── */
@media(max-width:768px) {
  .hero-sub { grid-template-columns: 1fr; }
  .hero-sub-visual { display: none; }
  .nav-links { display: none; }
  .nav-inner { padding: 0 18px; }
  .page { padding: 0 18px; }
}