/* ==========================================================================
   Sparkle — Main Layout & Theme System
   Pure Zero-Server Client Architecture
   ========================================================================== */

:root {
  --bg: #f2f3f7;
  --pn: #ffffff;
  --ink: #0f1729;
  --mut: #5b6478;
  --ln: rgba(15, 23, 41, 0.1);
  --acc: #ff5a1f;
  --strat: #4f46e5;
  --risk: #e11d74;
  --rgm: #0d9488;
  --c: var(--acc);
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0e1a;
    --pn: #121829;
    --ink: #eef1f8;
    --mut: #98a2b8;
    --ln: rgba(255, 255, 255, 0.1);
    --strat: #8b85ff;
    --risk: #ff5fa2;
    --rgm: #2dd4bf;
  }
}

:root[data-theme="dark"] {
  --bg: #0a0e1a;
  --pn: #121829;
  --ink: #eef1f8;
  --mut: #98a2b8;
  --ln: rgba(255, 255, 255, 0.1);
  --strat: #8b85ff;
  --risk: #ff5fa2;
  --rgm: #2dd4bf;
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: env(safe-area-inset-top, 0px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 Onest, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px);
  background: var(--bg);
  z-index: 50;
}

/* Service Top Banner / Version Badge */
.service-header {
  background: color-mix(in srgb, var(--ink) 4%, transparent);
  border-bottom: 1px solid var(--ln);
  padding: 4px 16px;
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--mut);
}
.service-header .badge {
  background: color-mix(in srgb, var(--acc) 14%, transparent);
  color: var(--acc);
  padding: 2px 8px;
  border-radius: 99px;
  font-weight: 600;
  font-size: 11px;
}

/* Grid Layout */
.app {
  display: grid;
  grid-template-columns: 256px minmax(0, 1fr);
  min-height: 100vh;
}

/* 256px Sticky Sidebar */
.side {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  height: calc(100vh - env(safe-area-inset-top, 0px));
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-right: 1px solid var(--ln);
  overflow-y: auto;
  background: var(--bg);
  z-index: 25;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.03em;
  color: inherit;
  text-decoration: none;
  padding: 0 8px 14px;
}

.side a:not(.logo) {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 10px;
  color: var(--mut);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.side a:not(.logo):hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--ink) 4%, transparent);
}

.side a[aria-current] {
  color: var(--ink);
  background: color-mix(in srgb, var(--c, var(--acc)) 14%, transparent);
  font-weight: 600;
}

.gl {
  margin: 18px 0 4px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  color: var(--mut);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.d {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c, var(--acc));
  display: inline-block;
  margin-right: 8px;
  flex: none;
}

.sbtn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--ln);
  background: var(--pn);
  color: var(--mut);
  border-radius: 12px;
  padding: 9px 12px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  margin-bottom: 10px;
  transition: border-color 0.15s, color 0.15s;
}
.sbtn:hover {
  border-color: var(--c);
  color: var(--ink);
}

kbd {
  font: inherit;
  font-size: 11px;
  border: 1px solid var(--ln);
  border-radius: 6px;
  padding: 1px 6px;
  background: color-mix(in srgb, var(--ink) 5%, transparent);
  font-weight: 600;
}

.side-footer {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--ln);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--ln);
  background: var(--pn);
  color: var(--ink);
  border-radius: 10px;
  padding: 7px 12px;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}
.theme-toggle-btn:hover {
  border-color: var(--c);
}

/* Mobile Topbar & Tabbar */
.top,
.tabbar {
  display: none;
}

/* Main Content Area */
main {
  padding: 32px clamp(20px, 4vw, 56px) 64px;
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  --c: var(--acc);
}

section {
  display: none;
}
section.on {
  display: block;
  animation: fadeIn 0.15s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Breadcrumbs & Subtabs */
#crumb {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  min-height: 38px;
  font-size: 13px;
  font-weight: 600;
}
#crumb:empty {
  display: none;
}

.seg {
  display: inline-flex;
  background: color-mix(in srgb, var(--ink) 7%, transparent);
  border-radius: 12px;
  padding: 3px;
  flex-wrap: wrap;
  gap: 2px;
}

.seg a,
.seg button {
  border: 0;
  background: none;
  color: var(--mut);
  font: inherit;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 9px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}

.seg [aria-current],
.seg .on {
  background: var(--pn);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
  font-weight: 600;
}

/* Typography */
h1, h2, h3, h4 {
  margin: 0;
  letter-spacing: -0.035em;
  line-height: 1.15;
  font-weight: 600;
}
h1 {
  font-size: clamp(28px, 4vw, 40px);
}
h2 {
  font-size: 22px;
}
h3 {
  font-size: 17px;
  letter-spacing: -0.02em;
}
h4 {
  font-size: 15px;
}

.sub {
  color: var(--mut);
  font-size: 16px;
  margin: 10px 0 24px;
  max-width: 640px;
}
.mut {
  color: var(--mut);
}
small {
  color: var(--mut);
  font-size: 12px;
}

/* Hero Section */
.hero h1 {
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.05;
}
.hero .sub {
  font-size: 18px;
}

.live {
  background: var(--pn);
  border: 1px solid var(--ln);
  border-radius: 20px;
  padding: 16px;
  max-width: 760px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}
.live input {
  width: 100%;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  font-size: 17px;
  padding: 8px 10px;
  outline: 0;
  border-bottom: 1px solid var(--ln);
}
#lo {
  padding: 14px 6px 4px;
}

/* Bento Grid */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
  margin-top: 36px;
}
.tile {
  grid-column: span 4;
  background: color-mix(in srgb, var(--c) 10%, var(--pn));
  border: 1px solid color-mix(in srgb, var(--c) 22%, transparent);
  border-radius: 26px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 180px;
  transition: transform 0.15s, border-color 0.15s;
}
.tile:hover {
  transform: translateY(-2px);
  border-color: var(--c);
}
.tile.w {
  grid-column: span 5;
}
.tile.s {
  grid-column: span 3;
}
.tile p {
  margin: 0;
  color: var(--mut);
  font-size: 14px;
}
.tile .chip {
  margin: auto 0 0;
  align-self: flex-start;
  font-size: 12px;
  font-weight: 500;
  background: color-mix(in srgb, var(--c) 18%, transparent);
  padding: 4px 12px;
  border-radius: 99px;
  color: var(--ink);
}

.cols {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  margin-top: 56px;
}

.wb {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

/* Focus Visible */
:is(.btn, .seg a, .seg button, .sbtn, .pill, input, select, textarea):focus-visible,
.side a:focus-visible {
  outline: 2px solid var(--c);
  outline-offset: 2px;
}

/* Responsive Styles */
@media (max-width: 900px) {
  .app {
    display: block;
  }
  .side {
    display: none;
  }
  .top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: env(safe-area-inset-top, 0px);
    z-index: 40;
    background: var(--bg);
    border-bottom: 1px solid var(--ln);
    padding: 10px 16px;
  }
  .top .logo {
    padding: 0;
    font-size: 18px;
  }
  .top .sbtn {
    margin: 0;
    padding: 6px 12px;
    font-size: 13px;
  }
  main {
    padding: 16px 16px 120px;
  }
  .bento,
  .cols,
  .wb {
    grid-template-columns: 1fr;
  }
  .tile,
  .tile.w,
  .tile.s {
    grid-column: auto;
    min-height: 0;
  }
  .cols {
    gap: 28px;
  }
  .tabbar {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    background: var(--pn);
    border-top: 1px solid var(--ln);
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom, 0px));
  }
  .tabbar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 6px 0;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
    color: var(--mut);
    text-decoration: none;
  }
  .tabbar a[aria-current] {
    color: var(--ink);
    background: color-mix(in srgb, var(--c) 14%, transparent);
    font-weight: 600;
  }
  .tabbar .d {
    margin: 0;
    width: 8px;
    height: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}