:root {
  --font-body: "Roboto", sans-serif;
  --font-display: "Roboto", sans-serif;

  --color-cyan: #08d3ef;
  --color-orange: #f88f07;
  --color-green: #89e601;
  --color-blue: #08d3ef;
  --color-dark: #25282d;
  --color-deep: #15181d;

  --cyan-soft: rgba(8, 211, 239, 0.14);
  --orange-soft: rgba(248, 143, 7, 0.14);
  --green-soft: rgba(137, 230, 1, 0.16);
  --blue-soft: rgba(8, 211, 239, 0.12);

  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: rgba(255, 255, 255, 0.97);
  --surface-soft: rgba(255, 255, 255, 0.76);

  --ink-900: #10161f;
  --ink-800: #1c2836;
  --ink-700: #435160;
  --ink-600: #5f6c79;
  --ink-500: #7d8894;

  --line: rgba(16, 22, 31, 0.08);
  --line-strong: rgba(16, 22, 31, 0.14);

  --success: #5e9800;
  --warning: #cb7400;
  --danger: #cb7400;

  --shadow-lg: 0 24px 56px rgba(8, 211, 239, 0.12);
  --shadow-md: 0 14px 34px rgba(28, 34, 41, 0.1);
  --shadow-sm: 0 10px 24px rgba(28, 34, 41, 0.08);

  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  position: relative;
  isolation: isolate;
  color: var(--ink-900);
  background: #ffffff;
  font-family: var(--font-body);
  overflow-x: clip;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  z-index: -2;
  background:
    radial-gradient(circle at 100% 0%, rgba(8, 211, 239, 0.14), transparent 24%),
    radial-gradient(circle at 0% 100%, rgba(137, 230, 1, 0.1), transparent 22%),
    linear-gradient(180deg, #ffffff, #fbfdfe 48%, #ffffff 100%);
  opacity: 1;
}

body::after {
  z-index: -1;
  background:
    radial-gradient(circle at 85% 18%, rgba(248, 143, 7, 0.08), transparent 18%),
    radial-gradient(circle at 15% 82%, rgba(8, 211, 239, 0.06), transparent 18%);
  opacity: 1;
}

body.auth-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 1.25rem 0 1.6rem;
  color: var(--ink-900);
  background: #ffffff;
}

body.auth-body::before {
  background:
    radial-gradient(circle at 12% 18%, rgba(137, 230, 1, 0.1), transparent 18%),
    radial-gradient(circle at 92% 8%, rgba(8, 211, 239, 0.18), transparent 26%),
    linear-gradient(180deg, #ffffff, #fbfdfe 60%, #ffffff 100%);
  opacity: 1;
}

body.auth-body::after {
  background: radial-gradient(circle at 86% 86%, rgba(248, 143, 7, 0.08), transparent 18%);
  opacity: 1;
}

body.app-body {
  padding: 1.15rem 0 2.25rem;
}

body,
button,
input,
select,
textarea {
  font-family: var(--font-body);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--ink-900);
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.25rem, 3.4vw, 3.35rem);
  line-height: 0.98;
}

h2 {
  font-size: clamp(1.35rem, 2.1vw, 2rem);
  line-height: 1.08;
}

h3 {
  font-size: 1.05rem;
  line-height: 1.24;
}

p {
  margin: 0;
  line-height: 1.65;
}

a {
  color: inherit;
}

::selection {
  background: rgba(8, 211, 239, 0.24);
}

:focus-visible {
  outline: 3px solid rgba(8, 211, 239, 0.34);
  outline-offset: 2px;
}

.auth-shell,
.app-grid {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}

.auth-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  gap: 0;
  align-items: stretch;
  border-radius: 36px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 26px 60px rgba(20, 29, 36, 0.12);
}

.app-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.intro-card,
.form-card,
.card,
.topbar {
  position: relative;
  overflow: hidden;
}

.intro-card,
.form-card,
.card {
  border: 1px solid rgba(8, 211, 239, 0.12);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.topbar {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.3rem 1.45rem 1.6rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.85rem;
  align-items: start;
  border-radius: 34px;
  color: var(--ink-900);
  background: linear-gradient(180deg, rgba(8, 211, 239, 0.14), rgba(255, 255, 255, 0.98) 56%);
  border: 1px solid rgba(8, 211, 239, 0.16);
  box-shadow: var(--shadow-md);
}

.topbar::before,
.topbar::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.topbar::before {
  display: block;
  inset: auto -6% -48px -6%;
  height: 96px;
  background: rgba(8, 211, 239, 0.12);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}

.topbar::after {
  display: block;
  inset: 0 auto auto 1.45rem;
  width: 92px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-green), var(--color-orange));
}

.topbar > * {
  position: relative;
  z-index: 1;
}

.topbar h1,
.topbar h2,
.topbar h3 {
  color: var(--ink-900);
}

.topbar-copy {
  display: grid;
  gap: 0.35rem;
}

.topbar-copy > .muted-note {
  display: block;
  width: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--ink-600);
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.topbar-join {
  grid-column: 1 / -1;
  display: grid;
  gap: 0.45rem;
  align-items: start;
  max-width: 460px;
  padding-top: 0.25rem;
}

.header-join-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
}

.header-join-form input {
  min-width: 0;
  padding-block: 0.78rem;
}

.header-join-form .btn {
  min-width: 112px;
}

.topbar-join .status {
  min-height: 1.2rem;
}

.intro-card,
.form-card,
.card {
  background: #ffffff;
}

.auth-shell > .intro-card,
.auth-shell > .form-card {
  min-height: 720px;
  border-radius: 0;
  box-shadow: none;
  border: 0;
}

.intro-card {
  padding: clamp(1.7rem, 2.5vw, 2.6rem);
  display: grid;
  gap: 0.95rem;
}

.intro-card--hero {
  align-content: center;
  justify-items: start;
  padding: clamp(2.5rem, 5vw, 3.8rem);
  color: #ffffff;
  border-color: transparent;
  background: linear-gradient(180deg, #16b6cf 0%, #08d3ef 58%, #23cae2 100%);
}

.intro-card--hero::before,
.intro-card--hero::after,
.form-card::before,
.form-card::after,
.card::before,
.card::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.intro-card--hero::before {
  display: block;
  inset: -12% -8% auto auto;
  width: 320px;
  height: 320px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.intro-card--hero::after {
  display: block;
  inset: auto auto -12% -10%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.intro-card > *,
.form-card > *,
.card > * {
  position: relative;
  z-index: 1;
}

.intro-card p,
.intro-card li {
  color: var(--ink-700);
}

.intro-card--hero p,
.intro-card--hero li {
  color: rgba(255, 255, 255, 0.9);
}

.hero-brand {
  display: grid;
  gap: 0.2rem;
  margin-bottom: 3rem;
}

.hero-brand-title {
  position: relative;
  display: inline-block;
  padding-right: 1.15rem;
  color: #ffffff;
  font-size: clamp(2.6rem, 4.3vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.96;
}

.hero-brand-title::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0.82rem 0 0 0 var(--color-orange);
  transform: translateY(-10%);
}

.hero-brand-tagline {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.34em;
  text-transform: uppercase;
}

.hero-copy {
  display: grid;
  gap: 0.8rem;
}

.hero-copy h2 {
  max-width: 8ch;
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  color: var(--ink-900);
}

.hero-copy p {
  font-size: 1rem;
  max-width: 30ch;
}

.hero-copy--landing {
  gap: 0.38rem;
}

.hero-copy--landing p {
  max-width: 13ch;
  margin: 0;
  color: #ffffff;
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 900;
  line-height: 1.04;
}

.hero-copy--landing p:last-child {
  color: rgba(255, 255, 255, 0.75);
}

.form-card {
  display: grid;
  gap: 1rem;
  align-content: center;
  padding: clamp(2rem, 3vw, 3.25rem);
  border: 1px solid rgba(8, 211, 239, 0.14);
  background: #ffffff;
}

.form-card::before {
  display: none;
  inset: 0 0 auto 0;
  height: 10px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-green), var(--color-orange));
}

.form-card::after {
  display: none;
  right: -78px;
  bottom: -78px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(137, 230, 1, 0.18) 0%, rgba(137, 230, 1, 0) 72%);
}

.card {
  display: grid;
  gap: 0.9rem;
  min-width: 0;
  padding: 1.35rem;
  border: 1px solid rgba(8, 211, 239, 0.12);
  transition: box-shadow 0.18s ease, border-color 0.18s ease;
}

.card::before {
  display: block;
  inset: 0 auto 0 0;
  width: 6px;
  border-radius: 18px 0 0 18px;
  background: linear-gradient(180deg, var(--color-cyan), rgba(8, 211, 239, 0.25));
}

.card::after {
  display: block;
  inset: auto 1rem 1rem auto;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(137, 230, 1, 0.16) 0%, rgba(137, 230, 1, 0) 72%);
}

.card:hover {
  border-color: rgba(8, 211, 239, 0.22);
  box-shadow: var(--shadow-md);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-cyan);
  font-weight: 800;
}

.eyebrow::before {
  content: "";
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 1rem 0 0 0 var(--color-cyan), 2rem 0 0 0 var(--color-orange);
  margin-right: 2rem;
}

.auth-body .eyebrow,
.intro-card--hero .eyebrow,
.topbar .eyebrow {
  color: var(--color-cyan);
}

.subtitle,
.page-subtitle,
.section-note {
  color: var(--ink-700);
}

.subtitle {
  font-size: 1rem;
  max-width: 34ch;
}

.page-subtitle {
  max-width: 60ch;
  font-size: 0.95rem;
}

.section-note {
  margin-top: -0.15rem;
  font-size: 0.92rem;
}

.topbar .page-subtitle,
.topbar .section-note {
  color: var(--ink-700);
}

.form-stack {
  display: grid;
  gap: 0.95rem;
}

.form-stack.compact {
  gap: 0.82rem;
}

.row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.field {
  display: grid;
  gap: 0.42rem;
}

.field span {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink-800);
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(8, 211, 239, 0.18);
  border-radius: 18px;
  padding: 0.9rem 1rem;
  color: var(--ink-900);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.82);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

textarea {
  min-height: 110px;
  resize: vertical;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath fill='%2308D3EF' d='M1.4 1.2 6 5.8l4.6-4.6L12 2.6 6 8 0 2.6z'/%3E%3C/svg%3E");
  background-position: calc(100% - 16px) 50%;
  background-size: 12px 8px;
  background-repeat: no-repeat;
  padding-right: 2.8rem;
}

input::placeholder,
textarea::placeholder {
  color: var(--ink-500);
}

input:hover,
select:hover,
textarea:hover {
  border-color: rgba(8, 211, 239, 0.34);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(8, 211, 239, 0.92);
  box-shadow: 0 0 0 4px rgba(8, 211, 239, 0.16);
  background: #ffffff;
}

button {
  border: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border-radius: 18px;
  padding: 0.82rem 1.15rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease, background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
  text-decoration: none;
  line-height: 1.2;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
  box-shadow: none;
}

.btn-primary {
  color: var(--color-dark);
  background: var(--color-cyan);
  border: 1px solid rgba(8, 211, 239, 0.24);
  box-shadow: 0 12px 24px rgba(8, 211, 239, 0.22);
}

.btn-primary:hover {
  background: #00c7e1;
  box-shadow: 0 16px 28px rgba(8, 211, 239, 0.26);
}

.btn-ghost {
  color: var(--color-dark);
  border: 1px solid rgba(8, 211, 239, 0.22);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: none;
}

.btn-ghost:hover {
  background: rgba(8, 211, 239, 0.08);
}

.btn-danger {
  color: var(--warning);
  border: 1px solid rgba(248, 143, 7, 0.22);
  background: rgba(248, 143, 7, 0.1);
  box-shadow: none;
}

.btn-danger:hover {
  background: rgba(248, 143, 7, 0.16);
}

.topbar .btn-ghost {
  color: var(--color-dark);
  border-color: rgba(8, 211, 239, 0.22);
  background: rgba(255, 255, 255, 0.94);
}

.topbar .btn-ghost:hover {
  background: rgba(8, 211, 239, 0.08);
}

.topbar .btn-danger {
  color: var(--warning);
  border-color: rgba(248, 143, 7, 0.22);
  background: rgba(248, 143, 7, 0.1);
}

.topbar .btn-danger:hover {
  background: rgba(248, 143, 7, 0.16);
}

.btn.small {
  padding: 0.62rem 0.94rem;
  font-size: 0.9rem;
  border-radius: 14px;
}

.text-btn {
  justify-self: start;
  margin-top: 0.15rem;
  border: none;
  background: transparent;
  color: var(--color-orange);
  font-weight: 700;
  cursor: pointer;
  padding: 0;
}

.text-btn:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.status {
  min-height: 1.6rem;
  font-size: 0.92rem;
  color: var(--ink-700);
}

.status.info,
.status.success,
.status.error,
.status.warning {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.55rem 0.82rem;
  border-radius: 999px;
  border: 1px solid transparent;
}

.status.info {
  color: var(--color-dark);
  background: rgba(8, 211, 239, 0.1);
  border-color: rgba(8, 211, 239, 0.18);
}

.status.success {
  color: var(--success);
  background: var(--green-soft);
  border-color: rgba(137, 230, 0, 0.24);
}

.status.error {
  color: var(--warning);
  background: rgba(248, 143, 7, 0.12);
  border-color: rgba(248, 143, 7, 0.22);
}

.status.warning {
  color: var(--warning);
  background: var(--orange-soft);
  border-color: rgba(245, 146, 10, 0.22);
}

.muted-note {
  color: var(--ink-500);
  font-size: 0.88rem;
}

.hidden {
  display: none !important;
}

.badge,
.pill-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  border-radius: 999px;
  font-weight: 700;
  line-height: 1.2;
}

.badge {
  padding: 0.46rem 0.8rem;
  background: rgba(8, 211, 239, 0.1);
  color: var(--color-dark);
  border: 1px solid rgba(8, 211, 239, 0.18);
  font-size: 0.82rem;
}

.user-chip {
  display: grid;
  gap: 0.15rem;
  min-width: 230px;
  padding: 0.8rem 0.96rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(8, 211, 239, 0.18);
}

.user-chip span {
  font-size: 0.84rem;
  color: var(--ink-600);
}

.student-grid,
.teacher-grid,
.teacher-classroom-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.teacher-classroom-grid {
  grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
  align-items: start;
}

.tracking-grid {
  grid-template-columns: 1fr;
  align-items: start;
}

.tracking-shell {
  display: grid;
  gap: 1.25rem;
}

.tracking-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}

.tracking-stat {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 0.4rem;
  min-width: 0;
  padding: 1rem 1.05rem;
  border-radius: 24px;
  border: 1px solid rgba(8, 211, 239, 0.14);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(244, 247, 251, 0.96));
}

.tracking-stat::after {
  content: "";
  position: absolute;
  inset: auto -18px -34px auto;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: rgba(8, 211, 239, 0.08);
}

.tracking-stat > * {
  position: relative;
  z-index: 1;
}

.tracking-stat-label {
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-600);
}

.tracking-stat strong {
  display: block;
  min-width: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1;
  color: var(--ink-900);
}

.tracking-stat p {
  margin: 0;
  color: var(--ink-600);
  font-size: 0.88rem;
  line-height: 1.45;
}

.tracking-stat--cyan {
  border-color: rgba(8, 211, 239, 0.18);
}

.tracking-stat--cyan::after {
  background: rgba(8, 211, 239, 0.12);
}

.tracking-stat--green {
  border-color: rgba(137, 230, 0, 0.22);
}

.tracking-stat--green::after {
  background: rgba(137, 230, 0, 0.14);
}

.tracking-stat--orange {
  border-color: rgba(245, 146, 10, 0.2);
}

.tracking-stat--orange::after {
  background: rgba(245, 146, 10, 0.13);
}

.tracking-stat--dark {
  border-color: rgba(18, 32, 51, 0.1);
}

.tracking-stat--dark::after {
  background: rgba(18, 32, 51, 0.08);
}

.tracking-toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 2fr) repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  align-items: end;
}

.tracking-field {
  min-width: 0;
}

.tracking-student-radar,
.tracking-wall-panel {
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
  border-radius: 26px;
  border: 1px solid rgba(8, 211, 239, 0.12);
  background:
    radial-gradient(circle at top right, rgba(8, 211, 239, 0.08), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(245, 248, 251, 0.98));
}

.tracking-section-head {
  align-items: center;
}

.tracking-section-head h3 {
  font-size: 1.1rem;
}

.tracking-student-list {
  display: flex;
  gap: 0.8rem;
  overflow-x: auto;
  padding-bottom: 0.2rem;
  scrollbar-width: thin;
}

.tracking-student-chip {
  min-width: 250px;
  padding: 0.95rem 1rem;
  border-radius: 22px;
  border: 1px solid rgba(8, 211, 239, 0.16);
  background: rgba(255, 255, 255, 0.96);
  display: grid;
  gap: 0.72rem;
  text-align: left;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.tracking-student-chip:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.tracking-student-chip.is-selected {
  border-color: rgba(18, 32, 51, 0.18);
  background: linear-gradient(180deg, rgba(255, 255, 255, 1), rgba(235, 247, 250, 0.98));
  box-shadow: 0 18px 36px rgba(18, 32, 51, 0.12);
}

.tracking-student-chip.is-healthy {
  border-color: rgba(137, 230, 0, 0.24);
}

.tracking-student-chip.is-warm {
  border-color: rgba(8, 211, 239, 0.18);
}

.tracking-student-chip.is-cold {
  border-color: rgba(245, 146, 10, 0.2);
}

.tracking-student-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.8rem;
}

.tracking-student-id {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.tracking-student-avatar {
  display: inline-grid;
  place-items: center;
  width: 2.55rem;
  height: 2.55rem;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(8, 211, 239, 0.2), rgba(137, 230, 0, 0.2));
  color: var(--color-dark);
  font-weight: 900;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.tracking-student-name {
  display: block;
  color: var(--ink-900);
}

.tracking-student-meta,
.tracking-student-note,
.tracking-material-time {
  margin: 0;
  color: var(--ink-600);
  font-size: 0.84rem;
  line-height: 1.45;
}

.tracking-student-progress {
  height: 0.65rem;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(18, 32, 51, 0.08);
}

.tracking-student-progress span,
.tracking-progress-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-green), var(--color-orange));
}

.tracking-wall {
  gap: 1rem;
}

.tracking-material-card {
  gap: 1rem;
}

.tracking-material-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.tracking-material-copy {
  display: grid;
  gap: 0.42rem;
  min-width: 0;
}

.tracking-material-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.tracking-coverage {
  display: grid;
  gap: 0.35rem;
  justify-items: end;
  text-align: right;
  flex-shrink: 0;
}

.tracking-coverage strong {
  font-size: 1.55rem;
}

.tracking-focus-banner {
  display: grid;
  gap: 0.25rem;
  padding: 0.8rem 0.9rem;
  border-radius: 18px;
  border: 1px solid rgba(8, 211, 239, 0.12);
  background: rgba(8, 211, 239, 0.08);
}

.tracking-focus-banner.done {
  border-color: rgba(137, 230, 0, 0.24);
  background: rgba(137, 230, 0, 0.12);
}

.tracking-focus-banner.pending {
  border-color: rgba(245, 146, 10, 0.24);
  background: rgba(245, 146, 10, 0.12);
}

.tracking-focus-banner p {
  margin: 0;
  color: var(--ink-700);
  line-height: 1.45;
}

.tracking-focus-label,
.tracking-cluster-title {
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-600);
}

.tracking-progress {
  display: grid;
  gap: 0.48rem;
}

.tracking-progress-bar {
  height: 0.78rem;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(18, 32, 51, 0.08);
}

.tracking-progress-copy {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  color: var(--ink-600);
  font-size: 0.84rem;
}

.tracking-student-lane {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding: 0.9rem;
  border-radius: 20px;
  border: 1px solid rgba(8, 211, 239, 0.12);
  background: rgba(244, 247, 251, 0.78);
}

.tracking-cell-dot {
  width: 1rem;
  height: 1rem;
  padding: 0;
  border-radius: 50%;
  border: 2px solid rgba(18, 32, 51, 0.1);
  background: rgba(18, 32, 51, 0.1);
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.tracking-cell-dot:hover {
  transform: scale(1.18);
}

.tracking-cell-dot.is-open {
  border-color: rgba(137, 230, 0, 0.32);
  background: linear-gradient(135deg, rgba(8, 211, 239, 0.88), rgba(137, 230, 0, 0.88));
  box-shadow: 0 0 0 3px rgba(137, 230, 0, 0.14);
}

.tracking-cell-dot.is-pending {
  border-color: rgba(245, 146, 10, 0.3);
  background: rgba(245, 146, 10, 0.16);
}

.tracking-cell-dot.is-focus {
  transform: scale(1.22);
  border-color: rgba(18, 32, 51, 0.48);
  box-shadow: 0 0 0 4px rgba(18, 32, 51, 0.12);
}

.tracking-material-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.tracking-cluster {
  display: grid;
  gap: 0.65rem;
  padding: 0.92rem;
  border-radius: 20px;
  border: 1px solid rgba(8, 211, 239, 0.12);
  background: rgba(255, 255, 255, 0.88);
}

.tracking-chip-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tracking-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.42rem 0.68rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.25;
}

.tracking-chip.done {
  color: var(--success);
  background: var(--green-soft);
  border-color: rgba(137, 230, 0, 0.24);
}

.tracking-chip.pending {
  color: var(--warning);
  background: var(--orange-soft);
  border-color: rgba(245, 146, 10, 0.24);
}

.tracking-chip.info {
  color: var(--color-dark);
  background: var(--blue-soft);
  border-color: rgba(8, 211, 239, 0.18);
}

.tracking-detail {
  display: grid;
  gap: 0.8rem;
  padding-top: 0.15rem;
}

.tracking-detail summary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  list-style: none;
  font-weight: 800;
  color: var(--color-dark);
}

.tracking-detail summary::-webkit-details-marker {
  display: none;
}

.tracking-detail summary::before {
  content: "+";
  display: inline-grid;
  place-items: center;
  width: 1.3rem;
  height: 1.3rem;
  border-radius: 50%;
  background: rgba(8, 211, 239, 0.14);
  color: var(--color-dark);
  transition: transform 0.16s ease, background 0.16s ease;
}

.tracking-detail[open] summary::before {
  transform: rotate(45deg);
  background: rgba(137, 230, 0, 0.18);
}

.tracking-detail-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tracking-detail-grid .student-click-item {
  min-width: 0;
}

.tracking-detail-grid .student-click-item.is-focus {
  border-color: rgba(18, 32, 51, 0.22);
  box-shadow: 0 10px 20px rgba(18, 32, 51, 0.08);
}

.tracking-empty {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 1.05rem;
  border-radius: 20px;
  border: 1px dashed rgba(8, 211, 239, 0.22);
  background: rgba(244, 247, 251, 0.75);
}

.tracking-empty p {
  margin: 0;
  color: var(--ink-600);
}

.card-span {
  grid-column: 1 / -1;
}

.classroom-nav {
  width: min(1180px, calc(100% - 2rem));
  margin: 0.15rem auto 0;
  display: flex;
  gap: 1.4rem;
  align-items: center;
  overflow-x: auto;
  padding: 0 0.35rem;
  scrollbar-width: none;
}

.classroom-nav::-webkit-scrollbar {
  display: none;
}

.classroom-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.85rem 0.05rem 0.95rem;
  border: 0;
  background: transparent;
  color: var(--ink-600);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.16s ease;
}

.classroom-tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  border-radius: 999px;
  background: transparent;
  transition: background 0.16s ease;
}

.classroom-tab:hover {
  color: var(--color-dark);
}

.classroom-tab.is-active {
  color: var(--color-dark);
}

.classroom-tab.is-active::after {
  background: linear-gradient(90deg, var(--color-cyan), var(--color-green));
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.8rem;
}

.feed-grid,
.classroom-list,
.materials-list,
.dashboard-grid {
  display: grid;
  gap: 0.85rem;
}

.classroom-card,
.material-item,
.classroom-list-item,
.dashboard-item {
  position: relative;
  display: grid;
  gap: 0.55rem;
  padding: 1rem 1.05rem 1rem 1.1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(8, 211, 239, 0.14);
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.classroom-card:hover,
.material-item:hover,
.classroom-list-item:hover,
.dashboard-item:hover {
  transform: translateY(-2px);
  border-color: rgba(8, 211, 239, 0.24);
  background: #ffffff;
  box-shadow: var(--shadow-md);
}

.classroom-card::before,
.classroom-list-item::before,
.material-item::before,
.dashboard-item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  border-radius: 18px 0 0 18px;
}

.classroom-card::before,
.classroom-list-item::before {
  background: linear-gradient(180deg, var(--color-cyan), rgba(8, 211, 239, 0.45));
}

.material-item::before {
  background: linear-gradient(180deg, var(--color-orange), rgba(248, 143, 7, 0.4));
}

.dashboard-item::before {
  background: linear-gradient(180deg, var(--color-green), rgba(137, 230, 1, 0.45));
}

.classroom-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.9rem;
}

.classroom-meta {
  color: var(--ink-600);
  font-size: 0.88rem;
  line-height: 1.45;
}

.material-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 0.46rem 0.8rem;
  border-radius: 14px;
  color: var(--color-dark);
  background: rgba(8, 211, 239, 0.12);
  border: 1px solid rgba(8, 211, 239, 0.18);
  font-weight: 700;
  text-decoration: none;
  transition: background 0.16s ease, border-color 0.16s ease;
}

.material-link:hover {
  background: rgba(8, 211, 239, 0.2);
  border-color: rgba(8, 211, 239, 0.28);
}

.classroom-list,
.materials-list {
  display: grid;
  gap: 0.8rem;
}

.teacher-classroom-grid .card,
.tracking-grid .card {
  min-width: 0;
}

.classroom-list-item.active {
  border-color: rgba(8, 211, 239, 0.3);
  box-shadow: 0 16px 32px rgba(8, 211, 239, 0.14);
}

.classroom-list-item button,
.material-item .material-link {
  justify-self: start;
}

.material-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.8rem;
}

.inline-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.44rem 0.76rem;
  border-radius: 999px;
  border: 1px solid rgba(248, 143, 7, 0.22);
  color: var(--warning);
  background: rgba(248, 143, 7, 0.1);
  cursor: pointer;
  font-weight: 700;
}

.inline-danger:hover {
  background: rgba(248, 143, 7, 0.16);
}

.dashboard-item {
  gap: 0.8rem;
}

.student-click-grid {
  display: grid;
  gap: 0.65rem;
}

.student-click-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.9rem;
  padding: 0.82rem 0.9rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(8, 211, 239, 0.12);
}

.student-click-item.done {
  background: rgba(137, 230, 0, 0.12);
  border-color: rgba(137, 230, 0, 0.22);
}

.student-click-item.pending {
  background: rgba(245, 146, 10, 0.12);
  border-color: rgba(245, 146, 10, 0.22);
}

.pill-status {
  padding: 0.34rem 0.62rem;
  font-size: 0.76rem;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
}

.pill-status.done,
.pill-status.success {
  color: var(--success);
  background: var(--green-soft);
  border-color: rgba(137, 230, 0, 0.24);
}

.pill-status.pending,
.pill-status.warning {
  color: var(--warning);
  background: var(--orange-soft);
  border-color: rgba(245, 146, 10, 0.24);
}

.pill-status.info {
  color: var(--color-dark);
  background: var(--blue-soft);
  border-color: rgba(8, 211, 239, 0.18);
}

.classroom-list-item button {
  margin-top: 0.2rem;
}

.classroom-list-item .btn {
  box-shadow: none;
}

.material-item .classroom-meta,
.dashboard-item .classroom-meta {
  line-height: 1.45;
}

.material-top strong,
.classroom-list-item strong,
.dashboard-item strong,
.classroom-card h3,
.material-item strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink-900);
}

.section-head h2 + *,
.card > h2 + *,
.card > h1 + *,
.card > .section-note {
  margin-top: -0.05rem;
}

.card > .section-note {
  margin-top: -0.3rem;
}

.card > .badge {
  margin-top: 0.1rem;
}

.form-card .btn,
.form-card .text-btn {
  width: 100%;
}

.form-card .text-btn {
  text-align: center;
}

@media (prefers-reduced-motion: no-preference) {
  .topbar,
  .auth-shell > *,
  .app-grid > * {
    animation: reveal-up 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  }

  .auth-shell > *:nth-child(2),
  .app-grid > *:nth-child(2) {
    animation-delay: 0.08s;
  }

  .app-grid > *:nth-child(3) {
    animation-delay: 0.16s;
  }
}

@keyframes reveal-up {
  from {
    opacity: 0;
    transform: translateY(22px);
  }

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

@media (max-width: 1040px) {
  .auth-shell {
    grid-template-columns: 1fr;
    border-radius: 28px;
  }

  .hero-copy h2 {
    max-width: 12ch;
  }

  .auth-shell > .intro-card,
  .auth-shell > .form-card {
    min-height: auto;
  }

  .intro-card--hero {
    min-height: 360px;
  }

  .topbar {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .topbar-actions {
    justify-self: end;
  }
}

@media (max-width: 860px) {
  .student-grid,
  .teacher-grid,
  .teacher-classroom-grid {
    grid-template-columns: 1fr;
  }

  .card-span {
    grid-column: auto;
  }

  .row {
    grid-template-columns: 1fr;
  }

  .tracking-summary,
  .tracking-material-columns,
  .tracking-detail-grid {
    grid-template-columns: 1fr 1fr;
  }

  .tracking-toolbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tracking-field--search {
    grid-column: 1 / -1;
  }

  .classroom-nav {
    width: min(100%, calc(100% - 1.25rem));
    margin-top: 0.05rem;
    gap: 1rem;
    padding: 0 0.15rem;
  }

  .topbar {
    width: min(100%, calc(100% - 1.25rem));
    grid-template-columns: 1fr;
    gap: 0.95rem;
    padding: 1.15rem 1.05rem 1.35rem;
  }

  .topbar-actions {
    justify-content: flex-start;
    width: 100%;
  }

  .topbar-join {
    max-width: none;
  }

  .user-chip {
    min-width: 0;
    width: 100%;
  }

  .classroom-head,
  .material-top,
  .tracking-material-top,
  .section-head,
  .student-click-item,
  .header-join-form {
    align-items: flex-start;
    flex-direction: column;
  }

  .tracking-section-head,
  .tracking-student-head {
    flex-direction: row;
    align-items: flex-start;
  }

  .tracking-coverage {
    justify-items: start;
    text-align: left;
  }

  .tracking-progress-copy {
    flex-direction: column;
  }

  .student-click-item .pill-status {
    align-self: flex-start;
  }

  .header-join-form .btn {
    width: 100%;
  }

  .app-grid {
    margin-top: 0.85rem;
  }
}

@media (max-width: 560px) {
  body.auth-body {
    padding: 0.8rem 0 1rem;
  }

  .auth-shell,
  .app-grid,
  .classroom-nav {
    width: min(100%, calc(100% - 1rem));
  }

  .intro-card,
  .form-card,
  .card,
  .topbar {
    border-radius: 24px;
  }

  .card {
    padding: 1.05rem;
  }

  .intro-card,
  .form-card {
    padding: 1.15rem;
  }

  .hero-brand {
    margin-bottom: 2rem;
  }

  .topbar {
    padding: 1rem 0.95rem 1.2rem;
  }

  .topbar-actions .btn {
    width: 100%;
  }

  .classroom-card,
  .material-item,
  .classroom-list-item,
  .dashboard-item,
  .student-click-item {
    border-radius: 18px;
  }

  .tracking-summary,
  .tracking-toolbar,
  .tracking-material-columns,
  .tracking-detail-grid {
    grid-template-columns: 1fr;
  }

  .tracking-student-chip {
    min-width: min(240px, 85vw);
  }

  .tracking-student-head,
  .tracking-student-id,
  .tracking-section-head {
    width: 100%;
  }

  .tracking-section-head,
  .tracking-student-head {
    flex-direction: column;
  }

  .tracking-student-list {
    gap: 0.7rem;
  }

  h1 {
    font-size: clamp(2rem, 8.5vw, 2.6rem);
  }

  .hero-copy h2 {
    font-size: clamp(2rem, 10vw, 2.75rem);
  }

  .app-grid {
    margin-top: 0.75rem;
  }
}