@import url("https://fonts.googleapis.com/css2?family=Baloo+2:wght@600;700;800&family=Inter:wght@300;400;500;600;700&display=swap");

:root {
  /* Educational-platform claymorphism palette (vibrant + friendly) */
  --bb-bg: #f0fdfa;
  --bb-text: #134e4a;
  --bb-primary: #0d9488;
  --bb-primary-weak: #2dd4bf;
  --bb-cta: #ea580c;
  --bb-border: rgba(19, 78, 74, 0.12);
  --bb-border-strong: rgba(19, 78, 74, 0.20);

  --bb-font-heading: "Baloo 2", Inter, ui-sans-serif, system-ui;

  --bb-gradient: radial-gradient(1100px 520px at 12% 10%, rgba(13, 148, 136, 0.30), transparent 55%),
    radial-gradient(920px 620px at 92% 18%, rgba(45, 212, 191, 0.22), transparent 56%),
    radial-gradient(900px 600px at 45% 92%, rgba(234, 88, 12, 0.20), transparent 55%),
    linear-gradient(180deg, #f0fdfa 0%, #f8fafc 60%, #ffffff 100%);

  --bb-clay: linear-gradient(145deg, rgba(255,255,255,0.96), rgba(255,255,255,0.70));
  --bb-shadow-clay: 0 22px 60px rgba(19, 78, 74, 0.16), 0 2px 0 rgba(255,255,255,0.92) inset, 0 -2px 0 rgba(19, 78, 74, 0.05) inset;

  font-family: Inter, ui-sans-serif, system-ui;
  line-height: 1.5;
  font-weight: 400;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

/* Hide scrollbars but keep scrolling behavior */
body {
  -ms-overflow-style: none; /* IE/Edge legacy */
  scrollbar-width: none; /* Firefox */
}

body::-webkit-scrollbar {
  width: 0;
  height: 0;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--bb-gradient);
  color: var(--bb-text);
}

#app {
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

a {
  color: var(--bb-primary);
  text-decoration: none;
}

a:hover {
  color: var(--bb-cta);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid rgba(13, 148, 136, 0.55);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

/* --- Shared UI primitives (Web) --- */
.bb-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
}

.bb-pageHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.bb-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.bb-muted {
  color: rgba(19, 78, 74, 0.72);
  font-size: 12px;
}

.bb-input,
.bb-select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,0.55);
  border-radius: 16px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(10px);
  color: var(--bb-text);
}

/* Hide native file control (we use styled buttons) */
.bb-fileInput {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.bb-fileName {
  flex: 1;
  min-width: 180px;
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,0.55);
  border-radius: 16px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(10px);
  color: var(--bb-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bb-fileName.is-empty {
  color: rgba(19, 78, 74, 0.55);
}

/* Custom select (consistent dropdown menu styling) */
.bb-selectWrap {
  position: relative;
  width: 100%;
}

.bb-selectWrap.is-open {
  z-index: 9999;
}

.bb-selectWrap--sm .bb-selectTrigger {
  padding: 8px 10px;
}

.bb-selectTrigger {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,0.55);
  border-radius: 16px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(10px);
  color: var(--bb-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  text-align: left;
}

.bb-selectTrigger:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.bb-selectValue {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bb-selectPlaceholder {
  color: rgba(19, 78, 74, 0.55);
}

.bb-selectChevron {
  flex: 0 0 auto;
  opacity: 0.85;
}

.bb-selectMenu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 10000;
  border-radius: 18px;
  padding: 6px;
  border: 1px solid rgba(255,255,255,0.65);
  background: rgba(255,255,255,0.70);
  backdrop-filter: blur(14px);
  box-shadow: 0 22px 60px rgba(19, 78, 74, 0.16);
  max-height: 320px;
  overflow: auto;
}

.bb-selectMenu--portal {
  position: fixed;
  left: 0;
  top: 0;
  right: auto;
  z-index: 2147483000;
}

.bb-selectOption {
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  color: var(--bb-text);
  padding: 10px 10px;
  border-radius: 14px;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
}

.bb-selectOption:hover {
  background: rgba(13, 148, 136, 0.10);
}

.bb-selectOption.is-selected {
  background: rgba(234, 88, 12, 0.12);
  border-color: rgba(234, 88, 12, 0.22);
}

.bb-selectOption.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.bb-input--sm,
.bb-select--sm {
  padding: 8px 10px;
}

.bb-btn {
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 16px;
  background: linear-gradient(135deg, var(--bb-primary), var(--bb-cta));
  color: white;
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease, background 120ms ease;
}

.bb-oneLineEllipsis{
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.bb-btn:hover {
  filter: brightness(1.03);
}

.bb-btn:active {
  transform: translateY(1px);
}

.bb-btn--secondary {
  border-color: rgba(255,255,255,0.45);
  background: rgba(255,255,255,0.35);
  color: var(--bb-text);
}

/* Slightly stronger secondary background (better contrast on light cards) */
.bb-btn--secondary.bb-btn--soft {
  background: rgba(19, 78, 74, 0.10);
  border-color: rgba(19, 78, 74, 0.16);
}

/* Bookmark title: single line with ellipsis */
.bb-bookmarkTitle {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

/* When title sits in a flex row, allow it to shrink */
.bb-bookmarkTitleRow {
  flex: 1;
  min-width: 0;
}

/* SortableJS: nicer drag visuals */
.sortable-ghost {
  opacity: 0.55;
}

.sortable-drag {
  opacity: 0.98;
  transform: rotate(0.4deg) scale(1.01);
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.18);
}

/* "Pushed" neighbor feedback when swapping */
.bb-sortPush {
  transform: translateX(28px) translateY(-2px) scale(0.985);
  transition: transform 220ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

@media (max-width: 520px) {
  .bb-sortPush {
    transform: translateX(18px) translateY(-1px) scale(0.99);
  }
}

.bb-btn--danger {
  border-color: #fecaca;
  background: #fee2e2;
  color: #991b1b;
}

.bb-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.bb-card {
  border: 1px solid rgba(255,255,255,0.55);
  border-radius: 18px;
  padding: 12px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(12px);
  max-width: 100%;
  min-width: 0;
}

/* Avoid long content (e.g. URLs) forcing horizontal overflow */
.bb-card > * {
  min-width: 0;
}

.bb-card--interactive {
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.bb-card--interactive:hover {
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
  transform: translateY(-1px);
}

.bb-alert {
  border-radius: 12px;
  padding: 10px 12px;
  border: 1px solid var(--bb-border);
  background: rgba(2, 132, 199, 0.06);
}

.bb-alert--error {
  border-color: #fecaca;
  background: #fef2f2;
  color: #991b1b;
}

.bb-alert--ok {
  border-color: #bbf7d0;
  background: #f0fdf4;
  color: #065f46;
}

.bb-empty {
  border: 1px dashed rgba(15, 23, 42, 0.18);
  border-radius: 18px;
  padding: 18px 14px;
  background: rgba(255, 255, 255, 0.55);
}

/* --- Landing page (ui-ux-pro-max) --- */
.bb-landing {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 16px 28px;
}

.bb-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: stretch;
}

@media (min-width: 960px) {
  .bb-hero {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 16px;
  }
}

.bb-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.55);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.10);
  font-weight: 800;
  font-size: 12px;
}

.bb-pillDot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--bb-primary), var(--bb-cta));
  box-shadow: 0 10px 24px rgba(13, 148, 136, 0.18);
}

.bb-heroTitle {
  margin: 12px 0 8px;
  font-family: var(--bb-font-heading);
  font-size: 34px;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

@media (min-width: 960px) {
  .bb-heroTitle { font-size: 44px; }
}

.bb-heroSub {
  margin: 0;
  font-size: 14px;
  color: rgba(19, 78, 74, 0.78);
}

.bb-heroCtaRow {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 14px;
}

.bb-ctaPrimary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 18px;
  color: white;
  text-decoration: none;
  font-weight: 900;
  border: 1px solid rgba(255,255,255,0.25);
  background: linear-gradient(135deg, var(--bb-primary), var(--bb-cta));
  box-shadow: 0 18px 45px rgba(13, 148, 136, 0.20);
}

.bb-ctaGhost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 18px;
  color: var(--bb-text);
  text-decoration: none;
  font-weight: 900;
  border: 1px solid rgba(255,255,255,0.55);
  background: rgba(255,255,255,0.45);
}

.bb-miniStats {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 768px) {
  .bb-miniStats { grid-template-columns: repeat(3, 1fr); }
}

.bb-miniStat {
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.45);
  padding: 12px;
  box-shadow: 0 14px 40px rgba(19, 78, 74, 0.10);
}

.bb-miniStat .k { font-weight: 900; font-size: 12px; }
.bb-miniStat .v { margin-top: 6px; font-size: 12px; color: rgba(19,78,74,0.72); }

.bb-clayCard {
  border-radius: 22px;
  border: 2px solid rgba(255,255,255,0.78);
  background: var(--bb-clay);
  box-shadow: var(--bb-shadow-clay);
  padding: 14px;
}

.bb-statRow {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.bb-stat {
  border-radius: 18px;
  border: 2px solid rgba(255,255,255,0.72);
  background: rgba(255,255,255,0.48);
  padding: 12px;
  box-shadow: 0 16px 44px rgba(19, 78, 74, 0.12);
}

.bb-stat .n {
  font-family: var(--bb-font-heading);
  font-size: 20px;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.bb-stat .t {
  margin-top: 4px;
  font-size: 12px;
  font-weight: 800;
  color: rgba(19, 78, 74, 0.72);
}

.bb-cardTitle { font-weight: 950; letter-spacing: -0.02em; }
.bb-cardSub { margin-top: 6px; font-size: 12px; color: rgba(19,78,74,0.72); }

.bb-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 950;
  font-size: 11px;
  background: rgba(124, 58, 237, 0.14);
  border: 1px solid rgba(124, 58, 237, 0.28);
  width: fit-content;
}
.bb-tag2 { background: rgba(34, 197, 94, 0.14); border-color: rgba(34, 197, 94, 0.28); }
.bb-tag3 { background: rgba(251, 113, 133, 0.14); border-color: rgba(251, 113, 133, 0.28); }

.bb-bullets { margin: 10px 0 0; padding-left: 18px; }
.bb-bullets li { margin: 6px 0; font-weight: 700; color: rgba(19,78,74,0.78); }

.bb-section { margin-top: 18px; }
.bb-sectionHeader h2 { margin: 0; font-size: 18px; letter-spacing: -0.02em; font-family: var(--bb-font-heading); }
.bb-grid3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 12px;
}
@media (min-width: 960px) {
  .bb-grid3 { grid-template-columns: repeat(3, 1fr); }
}

.bb-courseGrid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 720px) {
  .bb-courseGrid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1100px) {
  .bb-courseGrid { grid-template-columns: repeat(4, 1fr); }
}

.bb-courseCard {
  border-radius: 22px;
  border: 2px solid rgba(255,255,255,0.78);
  background: var(--bb-clay);
  box-shadow: var(--bb-shadow-clay);
  padding: 14px;
  display: grid;
  gap: 10px;
}

.bb-courseTitle {
  font-weight: 950;
  letter-spacing: -0.02em;
}

.bb-courseBy {
  margin-top: 6px;
  font-size: 12px;
  font-weight: 900;
  color: rgba(19, 78, 74, 0.72);
}

.bb-courseMeta {
  font-size: 12px;
  color: rgba(19, 78, 74, 0.78);
  font-weight: 800;
}

.bb-courseCtaRow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.bb-courseCtaRow .bb-btn {
  width: 100%;
  display: inline-flex;
  justify-content: center;
}

.bb-centerRow {
  display: flex;
  justify-content: center;
}

.bb-featureCard {
  display: grid;
  gap: 8px;
}

.bb-iconBubble {
  width: 42px;
  height: 42px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: var(--bb-text);
  border: 2px solid rgba(255,255,255,0.78);
  background: rgba(255,255,255,0.55);
  box-shadow: 0 14px 40px rgba(19, 78, 74, 0.12);
}

.bb-progressDemo .bb-tip { margin-top: 10px; font-size: 12px; color: rgba(19,78,74,0.72); }
.bb-progressItem { margin-top: 10px; }
.bb-progressItem .row { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-weight: 800; font-size: 12px; }
.bb-progressItem .pct { font-weight: 950; }
.bb-progressItem .bar { margin-top: 8px; height: 12px; border-radius: 999px; background: rgba(15,23,42,0.08); overflow: hidden; border: 1px solid rgba(255,255,255,0.55); }
.bb-progressItem .fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--bb-primary), var(--bb-cta)); }
.bb-progressItem .fill2 { background: linear-gradient(90deg, #22c55e, #06b6d4); }
.bb-progressItem .fill3 { background: linear-gradient(90deg, #fb7185, #f59e0b); }

.bb-quote { font-weight: 800; line-height: 1.35; }
.bb-quoteBy { margin-top: 10px; font-size: 12px; color: rgba(15,23,42,0.72); font-weight: 900; }

.bb-story { position: relative; }

.bb-stars {
  display: flex;
  gap: 3px;
  color: rgba(234, 179, 8, 0.95);
  font-weight: 900;
}

.bb-star {
  width: 16px;
  height: 16px;
}

.bb-ctaBand {
  margin-top: 18px;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,0.6);
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.22), rgba(45, 212, 191, 0.18), rgba(234, 88, 12, 0.16));
  padding: 14px;
  box-shadow: 0 24px 80px rgba(19, 78, 74, 0.14);
}

.bb-ctaBandInner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.bb-ctaBandTitle { font-weight: 950; letter-spacing: -0.02em; }
.bb-ctaBandSub { margin-top: 4px; font-size: 12px; color: rgba(15,23,42,0.78); }

.bb-ctaBandHint {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 900;
  color: rgba(19, 78, 74, 0.78);
}

.bb-ctaBandActions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

/* Footer (educational platform style) */
.bb-footer {
  margin-top: 18px;
  padding: 18px 0 28px;
}

.bb-footerInner {
  border-radius: 24px;
  border: 2px solid rgba(255,255,255,0.68);
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(14px);
  box-shadow: 0 24px 80px rgba(19, 78, 74, 0.14);
  padding: 16px;
}

.bb-footerBrand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bb-footerLogo {
  width: 42px;
  height: 42px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-family: var(--bb-font-heading);
  font-weight: 800;
  border: 2px solid rgba(255,255,255,0.78);
  background: var(--bb-clay);
  box-shadow: var(--bb-shadow-clay);
}

.bb-footerTitle {
  font-family: var(--bb-font-heading);
  font-weight: 800;
}

.bb-footerCols {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 900px) {
  .bb-footerCols { grid-template-columns: repeat(3, 1fr); }
}

.bb-footerCol {
  display: grid;
  gap: 8px;
}

.bb-footerCol .h {
  font-weight: 950;
  color: rgba(19, 78, 74, 0.88);
}

.bb-footerCol a {
  color: rgba(19, 78, 74, 0.78);
  font-weight: 800;
}

.bb-footerCol a:hover {
  color: var(--bb-cta);
}

.bb-footerBottom {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(19, 78, 74, 0.10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.bb-footerSocial {
  display: flex;
  gap: 8px;
}

.bb-footerSocial .s {
  width: 34px;
  height: 34px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  border: 2px solid rgba(255,255,255,0.72);
  background: rgba(255,255,255,0.45);
  color: rgba(19, 78, 74, 0.88);
  font-weight: 950;
}

.bb-grid2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 768px) {
  .bb-grid2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* --- Auth / segmented controls / subtle motion --- */
.bb-auth {
  max-width: 1100px;
  padding-top: 22px;
  padding-bottom: 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 960px) {
  .bb-auth {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
}

.bb-authCard {
  position: relative;
  overflow: hidden;
}

.bb-authCard::before,
.bb-authCard::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 999px;
  filter: blur(22px);
  opacity: 0.55;
  pointer-events: none;
}

.bb-authCard::before {
  background: radial-gradient(circle at 30% 30%, rgba(13,148,136,0.42), transparent 60%);
  top: -160px;
  left: -140px;
}

.bb-authCard::after {
  background: radial-gradient(circle at 40% 40%, rgba(234,88,12,0.34), transparent 62%);
  bottom: -170px;
  right: -160px;
}

.bb-authHeader {
  position: relative;
  z-index: 1;
}

.bb-seg {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 8px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.65);
  background: rgba(255,255,255,0.45);
  backdrop-filter: blur(12px);
  position: relative;
  z-index: 1;
}

.bb-segBtn {
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.30);
  background: rgba(255,255,255,0.38);
  color: var(--bb-text);
  font-weight: 950;
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease, background 120ms ease;
}

.bb-segBtn:hover {
  filter: brightness(1.03);
}

.bb-segBtn:active {
  transform: translateY(1px);
}

.bb-segBtn.active {
  background: linear-gradient(135deg, rgba(124,58,237,0.92), rgba(251,113,133,0.92));
  color: white;
  border-color: rgba(255,255,255,0.45);
}

.bb-field {
  display: grid;
  gap: 6px;
}

.bb-label {
  font-size: 12px;
  font-weight: 900;
  color: rgba(15,23,42,0.78);
}

.bb-authAside {
  box-shadow: 0 18px 55px rgba(15, 23, 42, 0.10);
}

.bb-authBadges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

@keyframes bb-float {
  0% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(0, -8px, 0); }
  100% { transform: translate3d(0, 0, 0); }
}

.bb-card--interactive:hover {
  animation: bb-float 2.8s ease-in-out infinite;
}