:root {
  color-scheme: dark;
  --font-scale: 1;
  --bg: #0c0a18;
  --bg-elevated: #131020;
  --surface: rgba(25, 21, 39, 0.88);
  --surface-solid: #191527;
  --surface-soft: rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.065);
  --text: #f7f4fb;
  --text-soft: #bbb5c8;
  --text-faint: #878192;
  --border: rgba(255, 255, 255, 0.1);
  --border-soft: rgba(255, 255, 255, 0.065);
  --purple: #a780ed;
  --purple-strong: #7954ca;
  --purple-soft: rgba(153, 112, 229, 0.13);
  --blue: #79cbed;
  --gold: #e8bf68;
  --green: #6bd0a4;
  --red: #ef8696;
  --chart-1: #d7ae55;
  --chart-2: #a17be8;
  --chart-3: #6fbddd;
  --chart-4: #67c69c;
  --chart-5: #d87991;
  --chart-6: #e18a52;
  --chart-7: #55baa9;
  --chart-8: #8588e8;
  --chart-pending: #aaa;
  --shadow: 0 24px 70px rgba(3, 2, 12, 0.28);
  --focus: 0 0 0 3px rgba(167, 128, 237, 0.27);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: calc(16px * var(--font-scale));
}

body[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f0f8;
  --bg-elevated: #fbf9fd;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-solid: #fff;
  --surface-soft: rgba(74, 48, 103, 0.035);
  --surface-hover: rgba(100, 65, 143, 0.075);
  --text: #281d36;
  --text-soft: #655b70;
  --text-faint: #867d8e;
  --border: rgba(69, 43, 91, 0.13);
  --border-soft: rgba(69, 43, 91, 0.085);
  --purple: #7452ba;
  --purple-strong: #6541ae;
  --purple-soft: rgba(111, 74, 179, 0.1);
  --blue: #347fa4;
  --gold: #9d711b;
  --green: #24845e;
  --red: #bc3e53;
  --chart-1: #a76f00;
  --chart-2: #7444c2;
  --chart-3: #277fa6;
  --chart-4: #21835e;
  --chart-5: #c13f62;
  --chart-6: #bd5e25;
  --chart-7: #167d70;
  --chart-8: #555bc0;
  --chart-pending: #666;
  --shadow: 0 24px 70px rgba(61, 36, 81, 0.1);
  --focus: 0 0 0 3px rgba(116, 82, 186, 0.2);
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--bg); scroll-behavior: smooth; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 86% 7%, rgba(101, 69, 174, 0.15), transparent 27rem),
    radial-gradient(circle at 5% 52%, rgba(71, 142, 171, 0.08), transparent 28rem),
    var(--bg);
  font-size: 0.875rem;
  line-height: 1.5;
}

button, input, select { font: inherit; }
button, select { color: inherit; }
button { -webkit-tap-highlight-color: transparent; }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible { outline: none; box-shadow: var(--focus); }
[hidden] { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 12px;
  padding: 9px 13px;
  border-radius: 9px;
  color: white;
  background: #6942b2;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }

.brand, .auth-brand { display: inline-flex; align-items: center; gap: 11px; color: inherit; text-decoration: none; cursor: default; user-select: none; }
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: none;
  border: 1px solid var(--border);
  border-radius: 13px;
  color: var(--text);
  background: linear-gradient(145deg, rgba(205, 179, 234, 0.27), rgba(104, 66, 145, 0.35));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
}
.brand-mark svg { width: 29px; }
.brand > span:last-child, .auth-brand > span:last-child { display: flex; flex-direction: column; line-height: 1; }
.brand strong, .auth-brand strong { font-size: 0.89rem; letter-spacing: 0.075em; text-transform: uppercase; }
.brand small, .auth-brand small { margin-top: 5px; color: var(--text-faint); font-size: 0.58rem; letter-spacing: 0.15em; text-transform: uppercase; }

.eyebrow, .panel-kicker {
  margin: 0;
  color: #bea0e7;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
body[data-theme="light"] .eyebrow,
body[data-theme="light"] .panel-kicker { color: #6c4a9b; }

/* Login keeps the visual language of the student webview, adapted for teachers. */
.auth-shell {
  position: fixed;
  z-index: 50;
  inset: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
  overflow: auto;
  color: #fff;
  background:
    linear-gradient(112deg, rgba(7, 8, 24, 0.93) 0%, rgba(15, 12, 38, 0.76) 44%, rgba(10, 7, 25, 0.52) 100%),
    radial-gradient(circle at 78% 18%, rgba(156, 105, 205, 0.42), transparent 23rem),
    radial-gradient(circle at 86% 75%, rgba(75, 154, 185, 0.2), transparent 28rem),
    linear-gradient(145deg, #17102c, #0a0a18 72%);
}
.auth-overlay { position: fixed; inset: 0; pointer-events: none; background: radial-gradient(circle at 69% 24%, rgba(179, 125, 221, 0.16), transparent 29rem); }
.auth-toolbar { position: fixed; z-index: 2; top: 20px; right: 22px; }
.compact-select {
  height: 37px;
  padding: 0 32px 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(12, 8, 22, 0.56);
  backdrop-filter: blur(14px);
}
.auth-card {
  position: relative;
  z-index: 1;
  width: min(430px, 100%);
  padding: clamp(29px, 5vw, 43px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 23px;
  background: linear-gradient(145deg, rgba(29, 20, 43, 0.82), rgba(15, 11, 29, 0.74));
  box-shadow: 0 30px 90px rgba(4, 2, 12, 0.52), inset 0 1px rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(25px) saturate(125%);
}
.auth-brand { margin-bottom: 34px; }
.auth-brand .brand-mark { border-color: rgba(255, 255, 255, 0.2); background: linear-gradient(145deg, rgba(214, 189, 232, 0.42), rgba(111, 67, 144, 0.58)); }
.auth-brand small { color: rgba(255, 255, 255, 0.6); }
.auth-form h1 { margin: 8px 0 0; font-size: clamp(1.8rem, 5vw, 2.35rem); line-height: 1.12; letter-spacing: -0.04em; }
.auth-lead { margin: 13px 0 27px; color: rgba(255, 255, 255, 0.7); line-height: 1.65; }
.auth-field { display: block; margin-top: 16px; }
.auth-field > span { display: block; margin-bottom: 7px; color: rgba(255, 255, 255, 0.82); font-size: 0.76rem; font-weight: 700; }
.auth-field input {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  outline: none;
  color: white;
  background: rgba(8, 5, 15, 0.34);
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.auth-field input::placeholder { color: rgba(255, 255, 255, 0.34); }
.auth-field input:focus { border-color: rgba(204, 164, 240, 0.68); box-shadow: 0 0 0 3px rgba(168, 124, 255, 0.13); background: rgba(8, 5, 15, 0.47); }
.auth-error { min-height: 19px; margin: 12px 1px 1px; color: #ffc1ca; font-size: 0.75rem; line-height: 1.45; }
.auth-submit { width: 100%; height: 48px; margin-top: 8px; }
.auth-form.is-loading .button-label { display: none; }
.auth-form.is-loading .button-loading { display: inline-flex; }
.preview-divider { position: relative; margin: 17px 0 13px; color: rgba(255, 255, 255, 0.38); text-align: center; font-size: 0.66rem; }
.preview-divider::before { content: ""; position: absolute; top: 50%; right: 0; left: 0; height: 1px; background: rgba(255, 255, 255, 0.1); }
.preview-divider span { position: relative; padding: 0 10px; background: #171022; }
.preview-button { width: 100%; min-height: 43px; padding: 8px 12px; border: 1px dashed rgba(211, 181, 237, 0.34); border-radius: 11px; cursor: pointer; color: #d9bdf2; background: rgba(167, 128, 237, 0.07); font-weight: 700; transition: 0.18s ease; }
.preview-button:hover { color: #fff; border-color: rgba(211, 181, 237, 0.55); background: rgba(167, 128, 237, 0.13); }
.auth-security { margin: 23px 0 0; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, 0.1); color: rgba(255, 255, 255, 0.5); font-size: 0.67rem; line-height: 1.6; }
.auth-security span { margin-right: 4px; color: #8ae0b7; }
.auth-caption { position: fixed; z-index: 1; right: clamp(26px, 5vw, 72px); bottom: clamp(24px, 5vw, 62px); display: flex; flex-direction: column; margin: 0; text-align: right; text-shadow: 0 3px 16px rgba(0, 0, 0, 0.55); }
.auth-caption strong { font-size: clamp(1rem, 2vw, 1.45rem); }
.auth-caption span { margin-top: 7px; color: rgba(255, 255, 255, 0.76); font-size: 0.74rem; }

body[data-theme="light"] .auth-shell {
  color: #2b1f38;
  background:
    linear-gradient(112deg, rgba(249, 245, 252, 0.94), rgba(239, 230, 247, 0.82) 48%, rgba(236, 245, 247, 0.68)),
    radial-gradient(circle at 78% 18%, rgba(161, 110, 207, 0.24), transparent 23rem),
    radial-gradient(circle at 86% 75%, rgba(87, 166, 194, 0.16), transparent 28rem),
    linear-gradient(145deg, #f9f6fc, #ece6f4 72%);
}
body[data-theme="light"] .auth-overlay { background: radial-gradient(circle at 69% 24%, rgba(136, 82, 178, 0.12), transparent 29rem); }
body[data-theme="light"] .auth-card { border-color: rgba(72, 43, 96, 0.15); background: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(245, 239, 249, 0.88)); box-shadow: 0 30px 90px rgba(56, 33, 73, 0.19); }
body[data-theme="light"] .auth-brand .brand-mark { color: #65439d; border-color: rgba(89, 61, 126, 0.14); background: linear-gradient(145deg, rgba(192, 161, 235, 0.62), rgba(224, 211, 245, 0.72)); }
body[data-theme="light"] .auth-brand small,
body[data-theme="light"] .auth-lead { color: rgba(43, 31, 56, 0.68); }
body[data-theme="light"] .auth-field > span { color: rgba(43, 31, 56, 0.82); }
body[data-theme="light"] .auth-field input { color: #281d36; border-color: rgba(69, 43, 91, 0.16); background: rgba(255, 255, 255, 0.72); }
body[data-theme="light"] .auth-field input::placeholder { color: rgba(43, 31, 56, 0.38); }
body[data-theme="light"] .auth-field input:focus { border-color: rgba(111, 74, 179, 0.52); background: #fff; }
body[data-theme="light"] .preview-divider { color: rgba(43, 31, 56, 0.38); }
body[data-theme="light"] .preview-divider::before { background: rgba(69, 43, 91, 0.1); }
body[data-theme="light"] .preview-divider span { background: #f7f2fa; }
body[data-theme="light"] .preview-button { color: #674394; border-color: rgba(103, 67, 148, 0.3); background: rgba(111, 74, 179, 0.06); }
body[data-theme="light"] .preview-button:hover { color: #432667; border-color: rgba(103, 67, 148, 0.48); background: rgba(111, 74, 179, 0.11); }
body[data-theme="light"] .auth-security { color: rgba(43, 31, 56, 0.52); border-top-color: rgba(69, 43, 91, 0.1); }
body[data-theme="light"] .auth-caption { color: #2b1f38; text-shadow: 0 2px 14px rgba(255, 255, 255, 0.7); }
body[data-theme="light"] .auth-caption span { color: rgba(43, 31, 56, 0.7); }
body[data-theme="light"] .compact-select { color: #463754; border-color: rgba(69, 43, 91, 0.16); background: rgba(255, 255, 255, 0.7); }

.primary-button, .secondary-button, .icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 11px;
  cursor: pointer;
  font-weight: 750;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, opacity 0.18s ease;
}
.primary-button {
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: white;
  background: linear-gradient(135deg, #9564c3, #653a8d);
  box-shadow: 0 12px 30px rgba(49, 20, 68, 0.35), inset 0 1px rgba(255, 255, 255, 0.16);
}
.primary-button:hover:not(:disabled), .secondary-button:hover:not(:disabled) { transform: translateY(-1px); }
.primary-button:disabled, .secondary-button:disabled, .icon-button:disabled { cursor: wait; opacity: 0.58; }
.button-loading { display: none; align-items: center; gap: 8px; }
.button-loading i {
  width: 15px;
  height: 15px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: #ead7ff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.dashboard-shell { min-height: 100vh; }
.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 clamp(20px, 4vw, 54px);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elevated) 84%, transparent);
  backdrop-filter: blur(18px) saturate(135%);
}
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.connection-status { display: inline-flex; align-items: center; gap: 8px; margin-right: 5px; color: var(--text-soft); font-size: 0.73rem; }
.connection-status i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 13%, transparent); }
.connection-status.is-offline i { background: var(--red); box-shadow: 0 0 0 4px color-mix(in srgb, var(--red) 13%, transparent); }
.connection-status.is-loading i { background: var(--gold); animation: pulse 1s ease infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }
.display-select { height: 40px; display: flex; align-items: center; gap: 7px; padding: 0 8px 0 11px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-soft); }
.display-select span { color: var(--text-faint); font-size: 0.66rem; font-weight: 700; }
.display-select select { max-width: 82px; border: 0; outline: 0; color: var(--text-soft); background: transparent; font-size: 0.72rem; font-weight: 700; }
.font-size-controls { height: 40px; display: grid; grid-template-columns: 33px 42px 33px; align-items: center; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-soft); overflow: hidden; }
.font-size-controls button { height: 100%; padding: 0; border: 0; cursor: pointer; color: var(--text-faint); background: transparent; font-size: 0.68rem; font-weight: 750; transition: color .18s, background .18s; }
.font-size-controls button:hover:not(:disabled) { color: var(--text); background: var(--surface-hover); }
.font-size-controls button:disabled { cursor: not-allowed; opacity: .34; }
.font-size-value { min-width: 0; color: var(--text-faint); text-align: center; font: 0.58rem ui-monospace, SFMono-Regular, Consolas, monospace; }
.secondary-button { height: 40px; padding: 0 13px; border: 1px solid var(--border); color: var(--text-soft); background: var(--surface-soft); }
.secondary-button:hover:not(:disabled) { color: var(--text); background: var(--surface-hover); }
.logout-button svg { width: 17px; }
.icon-button { width: 40px; height: 40px; padding: 0; border: 1px solid var(--border); color: var(--text-soft); background: var(--surface-soft); }
.icon-button:hover:not(:disabled) { color: var(--text); background: var(--surface-hover); }
.icon-button svg { width: 18px; }
.theme-toggle .sun-icon { display: none; }
body[data-theme="light"] .theme-toggle .moon-icon { display: none; }
body[data-theme="light"] .theme-toggle .sun-icon { display: block; }

.dashboard { width: min(1480px, 100%); margin: 0 auto; padding: clamp(27px, 4vw, 52px) clamp(17px, 4vw, 54px) 58px; }
.hero-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; }
.hero-row h1 { margin: 8px 0 0; font-size: clamp(1.75rem, 4vw, 2.65rem); line-height: 1.1; letter-spacing: -0.045em; }
.hero-row > div:first-child > p:last-child { max-width: 660px; margin: 12px 0 0; color: var(--text-soft); font-size: 0.93rem; }
.hero-row .eyebrow { display: flex; align-items: center; gap: 8px; }
.hero-row .eyebrow span { width: 19px; height: 1px; background: var(--purple); }
.privacy-pill { min-width: 215px; display: flex; align-items: center; gap: 11px; padding: 11px 14px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface-soft); }
.privacy-pill svg { width: 24px; color: var(--green); }
.privacy-pill span { display: flex; flex-direction: column; }
.privacy-pill strong { font-size: 0.74rem; }
.privacy-pill small { margin-top: 2px; color: var(--text-faint); font-size: 0.64rem; }

.filter-bar { margin-top: 31px; display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.range-filter { display: flex; padding: 4px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-soft); }
.range-filter button { min-height: 36px; padding: 0 13px; border: 0; border-radius: 8px; cursor: pointer; color: var(--text-faint); background: transparent; font-size: 0.72rem; font-weight: 750; transition: 0.18s ease; }
.range-filter button:hover { color: var(--text); }
.range-filter button.is-active { color: var(--text); background: var(--surface-solid); box-shadow: 0 4px 16px rgba(4, 3, 12, 0.15); }
.error-filter { height: 45px; display: flex; align-items: center; gap: 9px; padding: 0 10px 0 13px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-soft); }
.error-filter span { color: var(--text-faint); font-size: 0.67rem; font-weight: 750; }
.error-filter select { min-width: 135px; border: 0; outline: none; color: var(--text-soft); background: transparent; font-size: 0.73rem; transition: color 0.18s ease; }
.error-filter select.has-category { color: var(--category-color); font-weight: 800; }
.error-filter select option { color: var(--text); background: var(--surface-solid); font-weight: 700; }
.error-filter select option.category-color { color: var(--category-color); }
.error-filter select:focus-visible { outline: 2px solid var(--purple); outline-offset: 4px; border-radius: 3px; }
.error-filter select:disabled { opacity: 0.55; }
.subtype-filter { min-width: 0; max-width: 100%; }
.subtype-filter select { min-width: 0; max-width: 280px; }
.refresh-button { flex: none; }
.refresh-button.is-loading svg { animation: spin 0.7s linear infinite; }
.updated-time { margin-left: auto; color: var(--text-faint); font-size: 0.67rem; white-space: nowrap; }

.dev-banner, .api-error { margin-top: 20px; border-radius: 13px; }
.dev-banner { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border: 1px solid color-mix(in srgb, var(--gold) 26%, transparent); color: var(--text-soft); background: color-mix(in srgb, var(--gold) 7%, transparent); font-size: 0.73rem; }
.dev-banner strong { color: var(--gold); }
.api-error { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 13px; padding: 15px 17px; border: 1px solid color-mix(in srgb, var(--red) 27%, transparent); background: color-mix(in srgb, var(--red) 7%, transparent); }
.api-error .error-icon { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 9px; color: var(--red); background: color-mix(in srgb, var(--red) 12%, transparent); font-weight: 900; }
.api-error strong { font-size: 0.78rem; }
.api-error p { margin: 2px 0 0; color: var(--text-soft); font-size: 0.71rem; }

.summary-grid { margin-top: 21px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 15px; }
.summary-card { min-height: 134px; display: flex; align-items: flex-start; gap: 15px; padding: 21px; border: 1px solid var(--border); border-radius: var(--radius-md); background: linear-gradient(145deg, var(--surface), color-mix(in srgb, var(--surface-solid) 72%, transparent)); box-shadow: 0 12px 38px rgba(3, 2, 12, 0.08); }
.summary-icon { width: 41px; height: 41px; display: grid; place-items: center; flex: none; border-radius: 12px; }
.summary-icon svg { width: 21px; }
.summary-icon.purple { color: var(--purple); background: color-mix(in srgb, var(--purple) 12%, transparent); }
.summary-icon.gold { color: var(--gold); background: color-mix(in srgb, var(--gold) 11%, transparent); }
.summary-icon.blue { color: var(--blue); background: color-mix(in srgb, var(--blue) 11%, transparent); }
.summary-icon.green { color: var(--green); background: color-mix(in srgb, var(--green) 11%, transparent); }
.summary-card > span:last-child { min-width: 0; display: flex; flex-direction: column; }
.summary-card small { color: var(--text-soft); font-size: 0.7rem; font-weight: 700; }
.summary-card strong { margin-top: 8px; font-size: 1.72rem; line-height: 1; letter-spacing: -0.035em; }
.summary-card em { margin-top: 9px; color: var(--text-faint); font-size: 0.64rem; font-style: normal; }

.analytics-grid { margin-top: 15px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 15px; }
.panel { position: relative; min-width: 0; min-height: 330px; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow); }
.panel-header { min-height: 79px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 21px; border-bottom: 1px solid var(--border-soft); }
.panel-header h2 { margin: 4px 0 0; font-size: 1.02rem; letter-spacing: -0.02em; }
.panel-note { color: var(--text-faint); font-size: 0.65rem; }
.panel-body { padding: 22px; }
.usage-panel, .sessions-panel { grid-column: 1 / -1; }
.usage-panel { min-height: 350px; }
.sessions-panel { min-height: 350px; }
.chart-body { min-height: 247px; display: flex; flex-direction: column; justify-content: center; gap: 17px; }

.bar-row { display: grid; grid-template-columns: minmax(85px, 0.8fr) minmax(120px, 2.4fr) auto; align-items: center; gap: 12px; }
.bar-label { min-width: 0; display: flex; align-items: center; gap: 8px; color: var(--text-soft); font-size: 0.72rem; font-weight: 700; }
.bar-label-text { min-width: 0; overflow-wrap: anywhere; }
.bar-label i { width: 7px; height: 7px; flex: none; border-radius: 50%; background: var(--bar-color); }
.bar-track { height: 9px; overflow: hidden; border-radius: 20px; background: var(--surface-hover); }
.bar-fill { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--bar-color); box-shadow: 0 0 10px color-mix(in srgb, var(--bar-color) 24%, transparent); transition: width 0.45s ease; }
.bar-value { min-width: 36px; color: var(--text); text-align: right; font-size: 0.73rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.hint-panel .bar-row:nth-child(1) { --bar-color: var(--chart-1); }
.hint-panel .bar-row:nth-child(2) { --bar-color: var(--chart-2); }
.hint-panel .bar-row:nth-child(3) { --bar-color: var(--chart-3); }
.error-panel .bar-row.category-color { --bar-color: var(--category-color); }
.category-color-0 { --category-color: var(--chart-pending); }
.category-color-1 { --category-color: var(--chart-1); }
.category-color-2 { --category-color: var(--chart-2); }
.category-color-3 { --category-color: var(--chart-3); }
.category-color-4 { --category-color: var(--chart-4); }
.category-color-5 { --category-color: var(--chart-5); }
.category-color-6 { --category-color: var(--chart-6); }
.category-color-7 { --category-color: var(--chart-7); }
.category-color-8 { --category-color: var(--chart-8); }
.grouped-error-chart { justify-content: flex-start; gap: 10px; }
.error-group { border-bottom: 1px solid var(--border-soft); padding-bottom: 10px; }
.error-group:last-child { border-bottom: 0; }
.error-group-summary { display: flex; align-items: center; gap: 10px; padding: 7px 0; cursor: pointer; list-style: none; }
.error-group-summary::-webkit-details-marker { display: none; }
.error-group-summary::before { content: "▸"; color: var(--category-color); }
.error-group[open] > summary::before { content: "▾"; }
.error-group-summary:focus-visible { outline: 2px solid var(--purple); outline-offset: 3px; border-radius: 4px; }
.error-group-title { flex: 1; min-width: 0; color: var(--category-color); font-size: 0.78rem; font-weight: 800; }
.error-subtypes { display: flex; flex-direction: column; gap: 14px; padding: 12px 0 8px 23px; }
.error-subtypes .bar-row { grid-template-columns: minmax(0, 1.7fr) minmax(55px, 1fr) auto; gap: 10px; }

.line-chart-wrap {
  min-height: 267px;
  padding: 18px 17px 12px;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  scrollbar-gutter: stable;
}
.line-chart-wrap:focus-visible { outline: none; box-shadow: inset var(--focus); }
.line-chart { width: 100%; height: 255px; display: block; overflow: visible; }
.chart-grid-line { stroke: var(--border-soft); stroke-width: 1; }
.chart-axis-label { fill: var(--text-faint); font-size: 10px; font-family: inherit; }
.chart-area { fill: url(#usageGradient); }
.chart-line { fill: none; stroke: var(--purple); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.chart-point { fill: var(--surface-solid); stroke: var(--purple); stroke-width: 2; }
.chart-point:focus { outline: none; stroke: var(--gold); stroke-width: 4; }

.table-wrap {
  max-width: 100%;
  max-height: min(560px, 65vh);
  padding: 0;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.table-wrap:focus-visible { outline: none; box-shadow: inset var(--focus); }
table { width: 100%; border-collapse: collapse; min-width: 1060px; }
th, td { padding: 14px 20px; border-bottom: 1px solid var(--border-soft); text-align: left; white-space: nowrap; }
th { color: var(--text-faint); background: var(--surface-soft); font-size: 0.62rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; }
thead th {
  position: sticky;
  z-index: 2;
  top: 0;
  background: color-mix(in srgb, var(--surface-solid) 96%, var(--purple) 4%);
  box-shadow: 0 1px 0 var(--border-soft);
}
td { color: var(--text-soft); font-size: 0.72rem; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--surface-soft); }
.session-code { color: var(--purple); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 0.68rem; font-weight: 800; }
.file-cell { max-width: 220px; overflow: hidden; text-overflow: ellipsis; color: var(--text); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.error-cell { max-width: 220px; white-space: normal; }
.subtype-cell { min-width: 160px; max-width: 260px; white-space: normal; overflow-wrap: anywhere; }
.duration-cell { color: var(--text); font-variant-numeric: tabular-nums; }
.session-cell { vertical-align: top; }
.error-chip, .result-chip { display: inline-flex; align-items: center; min-height: 25px; padding: 3px 8px; border-radius: 8px; font-size: 0.64rem; font-weight: 750; }
.error-chip { display: inline-block; max-width: 100%; color: var(--purple); background: var(--purple-soft); white-space: normal; overflow-wrap: anywhere; vertical-align: middle; }
.error-chip.category-color { color: var(--category-color); background: color-mix(in srgb, var(--category-color) 11%, transparent); }
.result-chip.resolved, .result-chip.passed { color: var(--green); background: color-mix(in srgb, var(--green) 10%, transparent); }
.result-chip.unknown { color: var(--muted); background: var(--surface-soft); }
.result-chip.unresolved, .result-chip.in-progress { color: var(--gold); background: color-mix(in srgb, var(--gold) 10%, transparent); }
.result-chip.failed { color: var(--red); background: color-mix(in srgb, var(--red) 10%, transparent); }

.panel-empty { min-height: 240px; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 25px; color: var(--text-faint); text-align: center; }
.panel-empty > span { width: 37px; height: 37px; display: grid; place-items: center; margin-bottom: 10px; border: 1px solid var(--border); border-radius: 12px; color: var(--purple); background: var(--surface-soft); font-size: 1.2rem; }
.panel-empty strong { color: var(--text-soft); font-size: 0.78rem; }
.panel-empty p { margin: 5px 0 0; font-size: 0.69rem; }

.panel-skeleton { min-height: 247px; display: none; flex-direction: column; justify-content: center; gap: 18px; padding: 24px; }
.panel-skeleton i { display: block; height: 12px; border-radius: 10px; background: linear-gradient(90deg, var(--surface-soft), var(--surface-hover), var(--surface-soft)); background-size: 210% 100%; animation: shimmer 1.2s ease infinite; }
.panel-skeleton i:nth-child(1) { width: 86%; }
.panel-skeleton i:nth-child(2) { width: 67%; }
.panel-skeleton i:nth-child(3) { width: 76%; }
.panel-skeleton i:nth-child(4) { width: 58%; }
.line-skeleton i { height: 1px; width: 100% !important; margin-top: 33px; }
.table-skeleton i { height: 36px; width: 100% !important; }
@keyframes shimmer { to { background-position: -210% 0; } }
.dashboard-content.is-loading .panel-body,
.dashboard-content.is-loading .panel-empty { display: none; }
.dashboard-content.is-loading .panel-skeleton { display: flex; }
.dashboard-content.is-loading .summary-card strong,
.dashboard-content.is-loading .summary-card em {
  color: transparent;
  border-radius: 7px;
  background: linear-gradient(90deg, var(--surface-soft), var(--surface-hover), var(--surface-soft));
  background-size: 210% 100%;
  animation: shimmer 1.2s ease infinite;
}
.dashboard-content.is-loading .summary-card strong { width: 70px; }
.dashboard-content.is-loading .summary-card em { width: 105px; }

.toast { position: fixed; z-index: 80; left: 50%; bottom: 25px; display: flex; align-items: center; gap: 8px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 11px; color: var(--text); background: var(--surface-solid); box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translate(-50%, 22px); transition: 0.23s ease; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
.toast > span:first-child { color: var(--green); }

@media (max-width: 1080px) {
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .topbar { height: auto; min-height: 72px; padding-top: 10px; padding-bottom: 10px; }
  .connection-status { display: none; }
}

@media (max-width: 820px) {
  .topbar { align-items: flex-start; }
  .topbar-actions { flex-wrap: wrap; justify-content: flex-end; }
  .display-select span { display: none; }
  .analytics-grid { grid-template-columns: 1fr; }
  .usage-panel, .sessions-panel { grid-column: auto; }
  .hero-row { align-items: flex-start; }
  .filter-bar { flex-wrap: wrap; }
  .updated-time { width: 100%; margin-left: 0; }
}

@media (max-width: 640px) {
  .auth-shell { align-items: start; padding: 78px 16px 35px; }
  .auth-card { padding: 27px 22px; }
  .auth-caption { display: none; }
  .topbar { position: static; display: block; padding: 13px 17px; }
  .topbar-actions { margin-top: 13px; justify-content: flex-start; }
  .display-select { flex: 1; }
  .display-select select { max-width: none; width: 100%; }
  .font-size-controls { grid-template-columns: 31px 37px 31px; }
  .logout-button { margin-left: auto; }
  .dashboard { padding-top: 30px; }
  .hero-row { display: block; }
  .privacy-pill { width: fit-content; margin-top: 20px; }
  .range-filter { width: 100%; overflow-x: auto; }
  .range-filter button { flex: 1 0 auto; }
  .error-filter { flex: 1 1 100%; }
  .error-filter select { min-width: 0; width: 100%; }
  .summary-grid { grid-template-columns: 1fr; }
  .summary-card { min-height: 115px; }
  .panel { min-height: 310px; border-radius: 16px; }
  .panel-header { padding: 16px 17px; }
  .panel-body { padding: 18px 17px; }
  .panel-note { display: none; }
  .error-panel .panel-note { display: inline; }
  .bar-row { grid-template-columns: 94px 1fr auto; gap: 9px; }
  .api-error { grid-template-columns: auto 1fr; }
  .api-error button { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}