* {
  box-sizing: border-box;
}

:root {
  --bg: #f5f5fb;
  --surface: #fff;
  --text: #172033;
  --muted: #697386;
  --border: #e1e6ef;
  --soft: #eef2f7;
  --primary: #3157d5;
  --danger: #c43d4b;
  --success: #16835b;
  --shadow: 0 10px 30px #1520340d;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

button {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid #3157d533;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 245px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 24px 15px;
  display: flex;
  flex-direction: column;
  z-index: 20;
}

.brand {
  display: flex;
  gap: 11px;
  align-items: center;
  padding: 0 8px 28px;
}

.logo {
  width: 40px;
  height: 40px;
  background: var(--text);
  color: white;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 12px;
}

.brand strong {
  display: block;
  font-size: 15px;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 10px;
  margin-top: 2px;
}

.nav {
  display: flex;
  gap: 10px;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 12px;
  border-radius: 10px;
  text-align: left;
  font-weight: 650;
}

.nav:hover {
  background: var(--soft);
  color: var(--text);
}

.nav.active {
  background: #eaf0ff;
  color: var(--primary);
}

.nav span {
  font-size: 13px;
}

.sidebox {
  margin-top: auto;
  background: var(--soft);
  border-radius: 14px;
  padding: 14px;
}

.sidebox small {
  display: block;
  color: var(--muted);
  font-size: 10px;
}

.sidebox b {
  display: block;
  font-size: 24px;
  margin: 3px 0;
}

main {
  margin-left: 245px;
  min-height: 100vh;
}

header {
  height: 84px;
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 34px;
  background: #f5f7fbeF;
  border-bottom: 1px solid #e1e6efaa;
  backdrop-filter: blur(10px);
}

h1 {
  font-size: 22px;
  margin: 3px 0;
}

h2 {
  font-size: 28px;
  margin: 4px 0;
}

h3 {
  font-size: 15px;
  margin: 0;
}

.eyebrow {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 800;
  color: var(--muted);
}

header > div:last-child {
  display: flex;
  gap: 8px;
}

.icon,
.avatar,
.mobile {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

.avatar {
  font-weight: 800;
}

.mobile {
  display: none;
}

.content {
  max-width: 1240px;
  margin: auto;
  padding: 30px 34px 70px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.hero {
  min-height: 210px;
  background: var(--text);
  color: white;
  border-radius: 23px;
  padding: 31px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.badge {
  background: #ffffff1f;
  padding: 6px 10px;
  border-radius: 20px;
  font-size: 10px;
  text-transform: uppercase;
  font-weight: 800;
}

.hero h2 {
  max-width: 640px;
  font-size: 30px;
  line-height: 1.1;
  margin: 15px 0 10px;
}

.hero p {
  max-width: 660px;
  color: #bac1ce;
  line-height: 1.55;
  margin: 0;
}

.ringbox {
  text-align: center;
  min-width: 125px;
}

.ring {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: auto;
  background: conic-gradient(white var(--p, 0%), #ffffff1f 0);
  display: grid;
  place-items: center;
  position: relative;
}

.ring:after {
  content: "";
  position: absolute;
  width: 77px;
  height: 77px;
  background: var(--text);
  border-radius: 50%;
}

.ring b {
  position: relative;
  z-index: 1;
}

.ringbox small {
  color: #bac1ce;
  font-size: 10px;
  display: block;
  margin-top: 9px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.stats article,
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 17px;
  box-shadow: var(--shadow);
}

.stats article {
  padding: 17px;
}

.stats small,
.card p {
  color: var(--muted);
  font-size: 11px;
}

.stats b {
  display: block;
  font-size: 24px;
  margin: 6px 0 2px;
}

.cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.card {
  padding: 21px;
  margin-bottom: 20px;
}

.cardhead {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}

.link {
  border: 0;
  background: none;
  color: var(--primary);
  font-size: 11px;
  font-weight: 800;
}

.skills {
  display: grid;
  gap: 15px;
}

.skilltop {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  margin-bottom: 6px;
}

.bar {
  height: 7px;
  background: var(--soft);
  border-radius: 20px;
  overflow: hidden;
}

.bar i {
  display: block;
  height: 100%;
  background: var(--primary);
  border-radius: 20px;
}

.activity {
  display: flex;
  gap: 10px;
  align-items: center;
  background: var(--soft);
  padding: 10px;
  border-radius: 11px;
  margin-bottom: 8px;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
  flex: none;
}

.activity b {
  display: block;
  font-size: 11px;
}

.activity small {
  font-size: 9px;
}

.goals {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.goal {
  border: 1px solid var(--border);
  padding: 15px;
  border-radius: 13px;
}

.goal h4 {
  font-size: 12px;
  margin: 0 0 8px;
}

.goalmeta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 9px;
  margin-bottom: 7px;
}

.goal button,
.mini {
  font-size: 9px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface);
  margin-top: 9px;
}

.goal button.danger,
.danger {
  color: var(--danger);
}

.intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.intro p {
  margin: 5px 0 0;
}

.primary,
.secondary,
.danger {
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 800;
  font-size: 11px;
}

.primary {
  background: var(--primary);
  color: white;
  border: 0;
}

.secondary {
  background: var(--soft);
  color: var(--text);
  border: 1px solid var(--border);
}

.danger {
  background: #fff0f1;
  border: 1px solid #ffd2d7;
}

.level {
  display: grid;
  grid-template-columns: 110px 1fr 80px;
  align-items: center;
  gap: 20px;
}

.level b {
  display: block;
  font-size: 27px;
}

.level small {
  font-size: 9px;
  color: var(--muted);
  text-transform: uppercase;
  font-weight: 800;
}

.level p {
  font-size: 10px;
  margin: 2px 0;
  color: var(--muted);
}

.levelbar {
  height: 10px;
  background: var(--soft);
  border-radius: 20px;
  overflow: hidden;
}

.levelbar i {
  display: block;
  width: 0;
  height: 100%;
  background: var(--primary);
}

.skillgrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.skillcard {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 18px;
}

.skillcard .score {
  font-size: 26px;
  font-weight: 800;
  margin: 7px 0;
}

.skillcard small {
  color: var(--muted);
  font-size: 10px;
}

.timeline {
  margin-top: 14px;
}

.timelineitem {
  display: grid;
  grid-template-columns: 90px 1fr 50px;
  gap: 12px;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
  font-size: 10px;
}

.timelineitem:last-child {
  border-bottom: 0;
}

.muted {
  color: var(--muted);
}

.filters {
  display: flex;
  gap: 9px;
  margin-bottom: 14px;
}

.filters input {
  flex: 1;
}

.filters input,
.filters select,
.form input,
.form select,
.form textarea {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 9px;
  padding: 10px;
  font-size: 11px;
}

.sessionrow {
  display: grid;
  grid-template-columns: 90px 100px 1fr 70px 30px;
  gap: 10px;
  padding: 12px 2px;
  border-bottom: 1px solid var(--border);
  align-items: center;
  font-size: 10px;
}

.sessionrow strong {
  font-size: 10px;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 30px;
  font-size: 11px;
}

.compact {
  margin-bottom: 15px;
}

.compact article {
  padding: 13px;
}

.compact b {
  font-size: 20px;
}

.vocabgrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.vocab {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 17px;
  box-shadow: var(--shadow);
}

.vocab .phrase {
  font-size: 17px;
  font-weight: 850;
  margin: 10px 0 4px;
}

.vocab .meaning {
  color: var(--muted);
  font-size: 11px;
}

.example {
  background: var(--soft);
  border-radius: 9px;
  padding: 10px;
  margin: 12px 0;
  font-size: 10px;
  line-height: 1.5;
}

.status {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 20px;
  font-size: 8px;
  font-weight: 800;
}

.new {
  background: #edf2ff;
  color: var(--primary);
}

.learning {
  background: #fff3d8;
  color: #a76c00;
}

.mastered {
  background: #e6f7ef;
  color: var(--success);
}

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

.assessment {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 18px;
}

.assessment h3 {
  margin-bottom: 2px;
}

.assessment small {
  color: var(--muted);
  font-size: 9px;
}

.scoreline {
  display: grid;
  grid-template-columns: 80px 1fr 30px;
  gap: 8px;
  align-items: center;
  font-size: 9px;
  margin-top: 10px;
}

.scoreline .bar {
  height: 6px;
}

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

.settings .card {
  margin: 0;
}

.form {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.form label {
  display: grid;
  gap: 5px;
  font-size: 10px;
  font-weight: 800;
}

.twocol,
.scoregrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.choices {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.choices button {
  padding: 9px 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 9px;
  font-size: 10px;
}

.choices button.active {
  border-color: var(--primary);
  color: var(--primary);
}

.stack {
  display: grid;
  gap: 8px;
  margin-top: 15px;
}

.file {
  text-align: center;
}

.settings ul {
  padding-left: 18px;
  color: var(--muted);
  font-size: 10px;
  line-height: 2;
}

.modalbg {
  position: fixed;
  inset: 0;
  background: #09101e88;
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 50;
}

.modalbg.open {
  display: flex;
}

.modal {
  display: none;
  width: min(520px, 100%);
  max-height: 90vh;
  overflow: auto;
  background: var(--surface);
  border-radius: 19px;
  padding: 24px;
  position: relative;
}

.modal.open {
  display: block;
}

.modal h3 {
  font-size: 19px;
}

.modal > p {
  color: var(--muted);
  font-size: 11px;
}

.close {
  position: absolute;
  right: 13px;
  top: 12px;
  border: 0;
  border-radius: 50%;
  background: var(--soft);
  width: 30px;
  height: 30px;
  font-size: 18px;
  color: var(--muted);
}

#toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: var(--text);
  color: white;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 10px;
  opacity: 0;
  transform: translateY(8px);
  transition: 0.2s;
  z-index: 100;
}

#toast.show {
  opacity: 1;
  transform: none;
}

body.dark {
  --bg: #0d1119;
  --surface: #151b26;
  --text: #edf1f7;
  --muted: #9aa5b7;
  --border: #2a3342;
  --soft: #202735;
  --shadow: 0 10px 30px #0003;
}

body.dark header {
  background: #0d1119eF;
}

body.dark .nav.active {
  background: #1e2b52;
}

body.dark .danger {
  background: #321a1e;
}

@media (max-width: 1000px) {
  .sidebar {
    width: 220px;
  }

  main {
    margin-left: 220px;
  }

  .content {
    padding: 25px;
  }

  .skillgrid,
  .vocabgrid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 760px) {
  .sidebar {
    transform: translateX(-100%);
    transition: 0.2s;
    width: 250px;
  }

  .sidebar.open {
    transform: none;
  }

  .overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: #0005;
    z-index: 19;
  }

  .overlay.open {
    display: block;
  }

  main {
    margin-left: 0;
  }

  .mobile {
    display: inline-block;
  }

  header {
    padding: 15px 17px;
    height: 75px;
    gap: 9px;
  }

  .content {
    padding: 20px 16px;
  }

  .hero {
    display: block;
    padding: 24px;
  }

  .hero h2 {
    font-size: 23px;
  }

  .ringbox {
    text-align: left;
    margin-top: 18px;
  }

  .ring {
    margin: 0;
    width: 78px;
    height: 78px;
  }

  .ring:after {
    width: 59px;
    height: 59px;
  }

  .stats,
  .cols,
  .settings,
  .assessmentgrid {
    grid-template-columns: 1fr 1fr;
  }

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

  .skillgrid,
  .vocabgrid {
    grid-template-columns: 1fr;
  }

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

  .intro {
    align-items: flex-start;
    flex-direction: column;
  }

  .filters {
    flex-direction: column;
  }

  .sessionrow {
    grid-template-columns: 70px 75px 1fr 55px 25px;
  }

  .twocol,
  .scoregrid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 430px) {
  .stats {
    grid-template-columns: 1fr 1fr;
  }

  .stats.compact {
    grid-template-columns: repeat(3, 1fr);
  }

  .stats.compact article:last-child {
    grid-column: auto;
  }

  .hero h2 {
    font-size: 21px;
  }
}