:root {
  color-scheme: light;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-2: #eef3f7;
  --ink: #17212b;
  --muted: #607080;
  --line: #dce4eb;
  --accent: #0f766e;
  --accent-2: #be123c;
  --amber: #b7791f;
  --blue: #2563eb;
  --shadow: 0 18px 50px rgba(23, 33, 43, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

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

button {
  cursor: pointer;
}

.hidden {
  display: none !important;
}

.app-shell {
  min-height: 100vh;
}

.auth-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 440px);
}

.brand-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(32px, 7vw, 96px);
  background: linear-gradient(135deg, #102a43, #0f766e 58%, #f2b84b);
  color: white;
}

.brand-panel h1 {
  max-width: 760px;
  margin: 30px 0 18px;
  font-size: clamp(38px, 6vw, 78px);
  line-height: 1;
}

.brand-panel p {
  max-width: 640px;
  margin: 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 18px;
  line-height: 1.7;
}

.brand-mark {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #fff;
  color: #102a43;
  font-weight: 900;
  letter-spacing: 0;
}

.brand-mark.small {
  width: 42px;
  height: 42px;
  background: var(--ink);
  color: white;
}

.auth-card,
.modal-card {
  background: var(--surface);
}

.auth-card {
  align-self: center;
  margin: 32px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h2,
h3 {
  margin: 0;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
  font-size: 14px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: white;
  padding: 12px 13px;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.primary-button,
.ghost-button,
.text-button,
.nav-button,
.icon-button {
  border-radius: 8px;
  border: 0;
  min-height: 42px;
  padding: 0 16px;
  font-weight: 800;
}

.primary-button {
  background: var(--accent);
  color: white;
}

.ghost-button {
  border: 1px solid var(--line);
  background: white;
  color: var(--ink);
}

.text-button {
  background: transparent;
  color: var(--accent);
}

.form-error {
  min-height: 20px;
  margin: 0;
  color: var(--accent-2);
  font-weight: 700;
}

.dashboard {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: white;
}

.sidebar-head {
  display: flex;
  gap: 12px;
  align-items: center;
}

.sidebar-head span {
  display: block;
  max-width: 160px;
  color: var(--muted);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
}

nav {
  display: grid;
  gap: 8px;
}

.nav-button {
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--muted);
}

.nav-button.active,
.nav-button:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.sidebar .ghost-button {
  margin-top: auto;
}

.content {
  min-width: 0;
  padding: 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.metric-card,
.panel,
.contest-card,
.problem-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.metric-card {
  padding: 18px;
}

.metric-card span {
  color: var(--muted);
  font-weight: 700;
}

.metric-card strong {
  display: block;
  margin-top: 10px;
  font-size: 34px;
}

.analytics-grid,
.profile-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.panel {
  padding: 18px;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-head span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.bar-list,
.compact-list,
.contest-list,
.problem-table {
  display: grid;
  gap: 12px;
}

.bar-row {
  display: grid;
  gap: 7px;
}

.bar-meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.bar-track {
  height: 10px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
}

.empty-state {
  color: var(--muted);
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.contest-card {
  padding: 18px;
  display: grid;
  gap: 14px;
}

.contest-card header,
.problem-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.contest-meta,
.problem-meta {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.problem-list {
  display: grid;
  gap: 10px;
}

.problem-row {
  padding: 14px;
  display: grid;
  gap: 12px;
}

.problem-controls {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) 110px 1.4fr;
  gap: 10px;
}

.problem-controls input {
  min-width: 0;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 12px;
  margin-bottom: 14px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 10px;
  color: white;
  background: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.status-solved {
  background: var(--accent);
}

.status-attempting {
  background: var(--blue);
}

.status-not_solved {
  background: var(--accent-2);
}

.status-understood {
  background: var(--amber);
}

.status-intuition {
  background: #6d28d9;
}

dialog {
  width: min(760px, calc(100vw - 24px));
  border: 0;
  border-radius: 8px;
  padding: 0;
  box-shadow: var(--shadow);
}

dialog::backdrop {
  background: rgba(23, 33, 43, 0.45);
}

.modal-card {
  padding: 22px;
  display: grid;
  gap: 18px;
}

.modal-head,
.modal-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.icon-button {
  width: 42px;
  padding: 0;
  background: var(--surface-2);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.avatar {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 34px;
  font-weight: 900;
}

.profile-card {
  display: grid;
  place-items: start;
  gap: 12px;
}

.profile-card p {
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .auth-layout,
  .dashboard,
  .analytics-grid,
  .profile-grid {
    grid-template-columns: 1fr;
  }

  .brand-panel {
    min-height: 42vh;
  }

  .sidebar {
    position: static;
    height: auto;
  }

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

@media (max-width: 640px) {
  .content,
  .sidebar,
  .auth-card {
    padding: 18px;
  }

  .auth-card {
    margin: 18px;
  }

  .topbar,
  .contest-card header,
  .problem-main,
  .modal-head,
  .modal-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .metric-grid,
  .form-grid,
  .toolbar,
  .problem-controls {
    grid-template-columns: 1fr;
  }
}