/*
  Foundational reset, theme tokens, shell layout, typography, grids, and shared primitives.
  Extracted from snippetz-study-v5.html so the HTML can stay focused on markup.
  Keep this file loaded in the order declared in the HTML because later files refine earlier styles.
*/

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box
    }

    :root {
      color-scheme: light;
      --bg: #f7f6f2;
      --bg2: #eeece6;
      --white: #ffffff;
      --surface: #fafaf7;
      --border: #e4e2d9;
      --border2: #d6d3c8;
      --text: #181714;
      --text2: #5a584f;
      --text3: #9c9a90;
      --accent: #2563eb;
      --al: rgba(37, 99, 235, .08);
      --ab: rgba(37, 99, 235, .18);
      --green: #16a34a;
      --gl: rgba(22, 163, 74, .08);
      --gb: rgba(22, 163, 74, .2);
      --red: #dc2626;
      --rl: rgba(220, 38, 38, .08);
      --rb: rgba(220, 38, 38, .2);
      --orange: #ea580c;
      --ol: rgba(234, 88, 12, .08);
      --ob: rgba(234, 88, 12, .2);
      --purple: #7c3aed;
      --pl: rgba(124, 58, 237, .08);
      --pb: rgba(124, 58, 237, .2);
      --teal: #0d9488;
      --tl: rgba(13, 148, 136, .08);
      --tb: rgba(13, 148, 136, .2);
      --yellow: #d97706;
      --yl: rgba(217, 119, 6, .08);
      --yb: rgba(217, 119, 6, .2);
      --pink: #db2777;
      --pkl: rgba(219, 39, 119, .08);
      --sh: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .03);
      --shm: 0 4px 12px rgba(0, 0, 0, .07), 0 2px 4px rgba(0, 0, 0, .03);
      --r: 10px;
      --rs: 7px
    }

    body.theme-dark {
      color-scheme: dark;
      --bg: #202327;
      --bg2: #2b3036;
      --white: #343a42;
      --surface: #2c3239;
      --border: #4a535f;
      --border2: #5a6471;
      --text: #f7f9fc;
      --text2: #d7dde6;
      --text3: #aeb8c6;
      --accent: #9bbcff;
      --al: rgba(155, 188, 255, .18);
      --ab: rgba(155, 188, 255, .36);
      --green: #7ee0a2;
      --gl: rgba(126, 224, 162, .16);
      --gb: rgba(126, 224, 162, .34);
      --red: #ff9b9b;
      --rl: rgba(255, 155, 155, .16);
      --rb: rgba(255, 155, 155, .34);
      --orange: #ffc06f;
      --ol: rgba(255, 192, 111, .16);
      --ob: rgba(255, 192, 111, .34);
      --purple: #c7b5ff;
      --pl: rgba(199, 181, 255, .16);
      --pb: rgba(199, 181, 255, .34);
      --teal: #73ded5;
      --tl: rgba(115, 222, 213, .16);
      --tb: rgba(115, 222, 213, .34);
      --sh: 0 1px 4px rgba(0, 0, 0, .28), 0 1px 2px rgba(0, 0, 0, .18);
      --shm: 0 16px 34px rgba(0, 0, 0, .3), 0 3px 8px rgba(0, 0, 0, .2)
    }

    body.theme-midnight-graphite {
      color-scheme: dark;
      --bg: #242628;
      --bg2: #303337;
      --white: #3a3e43;
      --surface: #32363b;
      --border: #555b63;
      --border2: #656c75;
      --text: #f6f3ed;
      --text2: #ddd8ce;
      --text3: #bbb4a8;
      --accent: #d0b882;
      --al: rgba(208, 184, 130, .18);
      --ab: rgba(208, 184, 130, .36);
      --green: #9bd39f;
      --gl: rgba(155, 211, 159, .16);
      --gb: rgba(155, 211, 159, .34);
      --red: #ee9a93;
      --rl: rgba(238, 154, 147, .16);
      --rb: rgba(238, 154, 147, .34);
      --orange: #dfb36f;
      --ol: rgba(223, 179, 111, .16);
      --ob: rgba(223, 179, 111, .34);
      --purple: #c3b1dc;
      --pl: rgba(195, 177, 220, .16);
      --pb: rgba(195, 177, 220, .34);
      --teal: #9fd2c8;
      --tl: rgba(159, 210, 200, .16);
      --tb: rgba(159, 210, 200, .34)
    }

    body.theme-soft-aurora {
      --bg: #f2f7f5;
      --bg2: #e5efeb;
      --white: #ffffff;
      --surface: #fbfdfc;
      --border: #dce8df;
      --border2: #cbdbd0;
      --text: #17201b;
      --text2: #53625a;
      --text3: #8b9b92;
      --accent: #2f7d74;
      --al: rgba(47, 125, 116, .09);
      --ab: rgba(47, 125, 116, .21);
      --green: #2f9b61;
      --gl: rgba(47, 155, 97, .09);
      --gb: rgba(47, 155, 97, .22);
      --orange: #b86f28;
      --ol: rgba(184, 111, 40, .1);
      --ob: rgba(184, 111, 40, .22);
      --purple: #6d65b7;
      --pl: rgba(109, 101, 183, .09);
      --pb: rgba(109, 101, 183, .22)
    }

    body.theme-slate-blue {
      --bg: #f3f6fb;
      --bg2: #e5ebf5;
      --white: #ffffff;
      --surface: #fbfcff;
      --border: #dbe4f0;
      --border2: #c9d5e5;
      --text: #152033;
      --text2: #526074;
      --text3: #8b98aa;
      --accent: #315f9d;
      --al: rgba(49, 95, 157, .09);
      --ab: rgba(49, 95, 157, .22);
      --green: #238b68;
      --gl: rgba(35, 139, 104, .09);
      --gb: rgba(35, 139, 104, .22);
      --orange: #b86827;
      --ol: rgba(184, 104, 39, .1);
      --ob: rgba(184, 104, 39, .22);
      --purple: #7357b7;
      --pl: rgba(115, 87, 183, .09);
      --pb: rgba(115, 87, 183, .22)
    }

    body.theme-light .sb,
    body.theme-soft-aurora .sb,
    body.theme-slate-blue .sb {
      background: color-mix(in srgb, var(--white) 88%, var(--bg));
    }

    body.theme-dark .sb,
    body.theme-midnight-graphite .sb {
      background: var(--surface);
    }

    body.theme-soft-aurora .sb-icon {
      background: linear-gradient(135deg, #2f7d74, #7ba77d);
    }

    body.theme-slate-blue .sb-icon {
      background: linear-gradient(135deg, #315f9d, #6b7fb0);
    }

    body.theme-midnight-graphite .sb-icon {
      background: linear-gradient(135deg, #6f6655, #a9915b);
    }

    body.theme-dark .sb-icon {
      background: linear-gradient(135deg, #5c82d8, #55aaa4);
    }

    body.theme-dark .fi,
    body.theme-midnight-graphite .fi {
      background: var(--bg2);
      color: var(--text);
      border-color: var(--border2);
    }

    body.theme-dark .fi:focus,
    body.theme-midnight-graphite .fi:focus {
      background: var(--white);
    }

    body.density-small {
      --r: 8px;
      --rs: 6px;
      font-size: 12px
    }

    body.density-large {
      --r: 12px;
      --rs: 8px;
      font-size: 14px
    }

    html,
    body {
      height: 100%;
      overflow: hidden;
      background: var(--bg)
    }

    body {
      font-family: 'Plus Jakarta Sans', sans-serif;
      color: var(--text);
      display: flex;
      font-size: 13px
    }

    body,
    .sb,
    .topbar,
    .card,
    .cc,
    .li,
    .modal,
    .fi,
    .btn {
      transition: background-color .24s ease, color .24s ease, border-color .24s ease, box-shadow .24s ease
    }

    /* ─── SIDEBAR ─── */
    .sb {
      position: relative;
      width: 220px;
      min-width: 220px;
      background: var(--white);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      overflow-y: hidden;
      flex-shrink: 0
    }

    .sb-logo {
      padding: 16px 14px 12px;
      border-bottom: 1px solid var(--border)
    }

    .sb-brand {
      display: flex;
      align-items: center;
      gap: 7px;
      margin-bottom: 5px
    }

    .sb-icon {
      width: 26px;
      height: 26px;
      position: relative;
      overflow: hidden;
      background: linear-gradient(135deg, var(--accent), #0d9488);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: 'Instrument Serif', serif;
      color: #fff;
      font-size: 13px
    }

    .sb-name {
      font-family: 'Instrument Serif', serif;
      font-size: 16px
    }

    .sb-mode {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: var(--al);
      border: 1px solid var(--ab);
      color: var(--accent);
      font-size: 10px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 20px;
      font-family: 'JetBrains Mono', monospace;
      letter-spacing: .4px
    }

    .sb-mode::before {
      content: '';
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: var(--accent)
    }

    .sb-grp {
      padding: 8px 7px 2px
    }

    .sb-nav {
      flex: 1;
      overflow-y: auto;
      padding-bottom: 4px
    }

    .sb-grp-lbl {
      font-size: 9px;
      font-weight: 800;
      letter-spacing: 1.2px;
      color: var(--text3);
      text-transform: uppercase;
      padding: 0 7px;
      margin-bottom: 3px;
      font-family: 'JetBrains Mono', monospace
    }

    .ni {
      display: flex;
      align-items: center;
      gap: 7px;
      padding: 6px 8px;
      border-radius: var(--rs);
      cursor: pointer;
      font-size: 12.5px;
      color: var(--text2);
      font-weight: 500;
      transition: all .13s;
      border: 1px solid transparent;
      margin-bottom: 1px;
      white-space: nowrap
    }

    .ni:hover {
      background: var(--bg);
      color: var(--text)
    }

    .ni.on {
      background: var(--al);
      color: var(--accent);
      border-color: var(--ab)
    }

    .ni .ic {
      width: 16px;
      text-align: center;
      font-size: 12px;
      flex-shrink: 0
    }

    .nbadge {
      margin-left: auto;
      font-size: 9px;
      font-weight: 700;
      padding: 1px 5px;
      border-radius: 8px;
      font-family: 'JetBrains Mono', monospace
    }

    .nb-r {
      background: var(--rl);
      color: var(--red)
    }

    .nb-b {
      background: var(--al);
      color: var(--accent)
    }

    .nb-g {
      background: var(--gl);
      color: var(--green)
    }

    .nb-o {
      background: var(--ol);
      color: var(--orange)
    }

    .nb-p {
      background: var(--pl);
      color: var(--purple)
    }

    .inst-btn {
      margin: 8px 7px;
      background: linear-gradient(135deg, #1e3a5f, #2563eb);
      border-radius: var(--r);
      padding: 10px 12px;
      cursor: pointer;
      transition: opacity .2s
    }

    .inst-btn:hover {
      opacity: .88
    }

    .ib-lbl {
      font-size: 9px;
      font-weight: 700;
      letter-spacing: 1.5px;
      color: rgba(255, 255, 255, .55);
      text-transform: uppercase;
      font-family: 'JetBrains Mono', monospace;
      margin-bottom: 2px
    }

    .ib-title {
      font-size: 12.5px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 1px
    }

    .ib-sub {
      font-size: 10.5px;
      color: rgba(255, 255, 255, .6)
    }

    .sb-foot {
      margin-top: auto;
      padding: 8px 7px;
      border-top: 1px solid var(--border)
    }

    .settings-trigger {
      width: 32px;
      height: 32px;
      flex: 0 0 32px;
      border-radius: 9px;
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--text2);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 15px;
      transition: transform .16s ease, background .16s ease, color .16s ease, border-color .16s ease, box-shadow .16s ease
    }

    .settings-trigger:hover,
    .settings-trigger.on {
      transform: translateY(-1px) rotate(18deg);
      background: var(--al);
      color: var(--accent);
      border-color: var(--ab);
      box-shadow: var(--sh)
    }

    .u-row {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 7px 8px;
      border-radius: var(--rs);
      cursor: pointer;
      transition: background .13s
    }

    .u-row:hover {
      background: var(--bg)
    }

    .av {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 10px;
      font-weight: 700;
      color: #fff;
      flex-shrink: 0
    }

    .u-name {
      font-size: 12.5px;
      font-weight: 700
    }

    .u-meta {
      font-size: 10px;
      color: var(--text3);
      font-family: 'JetBrains Mono', monospace
    }

    /* ─── MAIN ─── */
    .main {
      position: relative;
      flex: 1;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      min-width: 0
    }

    .topbar {
      height: 50px;
      min-height: 50px;
      background: var(--white);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      padding: 0 20px;
      gap: 10px;
      box-shadow: var(--sh);
      flex-shrink: 0
    }

    .tb-title {
      font-family: 'Instrument Serif', serif;
      font-size: 17px;
      color: var(--text)
    }

    .tb-sub {
      font-size: 11.5px;
      color: var(--text3);
      margin-left: 3px
    }

    .tb-right {
      margin-left: auto;
      display: flex;
      align-items: center;
      gap: 7px
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 6px 12px;
      border-radius: var(--rs);
      cursor: pointer;
      font-size: 12px;
      font-weight: 600;
      transition: all .13s;
      border: 1px solid var(--border2);
      background: var(--white);
      color: var(--text2);
      white-space: nowrap;
      font-family: 'Plus Jakarta Sans', sans-serif
    }

    .btn:hover {
      background: var(--bg);
      color: var(--text)
    }

    .btn.pr {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent)
    }

    .btn.pr:hover {
      background: #1d4ed8
    }

    .btn.sm {
      padding: 4px 10px;
      font-size: 11px
    }

    .pg {
      flex: 1;
      overflow-y: auto;
      padding: 20px;
      display: none
    }

    .pg.on {
      display: block;
      animation: fi .18s ease
    }

    @keyframes fi {
      from {
        opacity: 0;
        transform: translateY(4px)
      }

      to {
        opacity: 1;
        transform: translateY(0)
      }
    }

    ::-webkit-scrollbar {
      width: 4px
    }

    ::-webkit-scrollbar-track {
      background: transparent
    }

    ::-webkit-scrollbar-thumb {
      background: var(--border2);
      border-radius: 2px
    }

    /* ─── CORE COMPONENTS ─── */
    .ph {
      font-family: 'Instrument Serif', serif;
      font-size: 21px;
      color: var(--text);
      margin-bottom: 3px
    }

    .ps {
      font-size: 12.5px;
      color: var(--text3);
      margin-bottom: 16px
    }

    .stl {
      font-size: 10px;
      font-weight: 800;
      letter-spacing: 1.2px;
      color: var(--text3);
      text-transform: uppercase;
      font-family: 'JetBrains Mono', monospace;
      margin-bottom: 9px;
      display: flex;
      align-items: center;
      gap: 8px
    }

    .stag {
      font-size: 9px;
      color: var(--text3);
      font-weight: 600
    }

    .card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r);
      padding: 15px 17px;
      box-shadow: var(--sh)
    }

    .csm {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r);
      padding: 12px 14px;
      box-shadow: var(--sh)
    }

    /* ─── KAI ─── */
    .kai {
      position: relative;
      overflow: hidden;
      isolation: isolate;
      background: linear-gradient(135deg, rgba(255, 255, 255, .94), var(--al), rgba(13, 148, 136, .05));
      border: 1px solid var(--ab);
      border-radius: var(--r);
      padding: 14px 16px;
      margin-bottom: 16px;
      display: flex;
      align-items: flex-start;
      gap: 12px;
      box-shadow: var(--sh);
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease
    }

    .kai::after {
      content: "";
      position: absolute;
      inset: -45% -24%;
      background: linear-gradient(110deg, transparent 18%, rgba(255, 255, 255, .55) 38%, transparent 58%);
      transform: translateX(-65%);
      animation: edithSheen 8s ease-in-out infinite;
      pointer-events: none;
      z-index: -1
    }

    .kai:hover {
      transform: translateY(-1px);
      border-color: rgba(37, 99, 235, .26);
      box-shadow: var(--shm)
    }

    .k-orb {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: radial-gradient(circle at 30% 25%, #fff 0 8%, #60a5fa 9% 22%, var(--accent) 56%, #0d9488 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      color: #fff;
      flex-shrink: 0;
      animation: br 3s ease-in-out infinite, edithPulse 5s ease-in-out infinite
    }

    @keyframes edithSheen {
      0%, 46% { transform: translateX(-72%); opacity: 0 }
      54% { opacity: .8 }
      72%, 100% { transform: translateX(72%); opacity: 0 }
    }

    @keyframes edithPulse {
      0%, 100% { transform: scale(1) rotate(0deg) }
      50% { transform: scale(1.035) rotate(4deg) }
    }

    @keyframes br {

      0%,
      100% {
        box-shadow: 0 0 0 3px var(--ab)
      }

      50% {
        box-shadow: 0 0 0 6px rgba(37, 99, 235, .06)
      }
    }

    .k-lbl {
      font-size: 9px;
      font-weight: 800;
      letter-spacing: 1.5px;
      color: var(--accent);
      text-transform: uppercase;
      font-family: 'JetBrains Mono', monospace;
      margin-bottom: 3px
    }

    .k-msg {
      font-size: 13px;
      color: var(--text);
      line-height: 1.6
    }

    .k-msg strong {
      color: var(--accent)
    }

    .k-chips {
      display: flex;
      gap: 6px;
      margin-top: 8px;
      flex-wrap: wrap
    }

    .chip {
      font-size: 11px;
      font-weight: 600;
      color: var(--accent);
      background: var(--white);
      border: 1px solid var(--ab);
      padding: 4px 10px;
      border-radius: 20px;
      cursor: pointer;
      transition: all .13s
    }

    .chip:hover {
      background: var(--accent);
      color: #fff
    }

    /* ─── STATS ─── */
    .sr4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 11px;
      margin-bottom: 16px
    }

    .sr3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 11px;
      margin-bottom: 16px
    }

    .sbox {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r);
      padding: 13px 15px;
      box-shadow: var(--sh)
    }

    .slbl {
      font-size: 9px;
      font-weight: 800;
      letter-spacing: 1px;
      color: var(--text3);
      text-transform: uppercase;
      font-family: 'JetBrains Mono', monospace;
      margin-bottom: 5px
    }

    .sval {
      font-family: 'Instrument Serif', serif;
      font-size: 28px;
      line-height: 1;
      margin-bottom: 2px
    }

    .shint {
      font-size: 11px;
      color: var(--text3)
    }

    .c-b {
      color: var(--accent)
    }

    .c-g {
      color: var(--green)
    }

    .c-r {
      color: var(--red)
    }

    .c-o {
      color: var(--orange)
    }

    .c-p {
      color: var(--purple)
    }

    .c-t {
      color: var(--teal)
    }

    .c-y {
      color: var(--yellow)
    }

    /* ─── GRIDS ─── */
    .g2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 13px;
      margin-bottom: 16px
    }

    .g3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 11px;
      margin-bottom: 16px
    }

    .g4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-bottom: 16px
    }

    .gms {
      display: grid;
      grid-template-columns: 1fr 300px;
      gap: 14px
    }

    .gws {
      display: grid;
      grid-template-columns: 300px 1fr;
      gap: 14px;
      min-height: calc(100vh - 110px)
    }

    .wsl {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r);
      padding: 16px;
      display: flex;
      flex-direction: column;
      gap: 11px;
      overflow-y: auto;
      box-shadow: var(--sh)
    }

    .wsr {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r);
      padding: 16px;
      overflow-y: auto;
      box-shadow: var(--sh)
    }