/*
 * Tefsen social-learning web interface.
 * Inspired by familiar social-feed interaction patterns without copying another product.
 * IMPORTANT: the Tefsen brand gradient is intentionally preserved exactly.
 */
html.tefsen-web-reference.tefsen-android-parity {
  --bg: #001215;
  --bg-2: #03191d;
  --surface: #071f24;
  --surface-2: #0a292f;
  --surface-3: #0d3339;
  --text: #f2fbfb;
  --muted: #8fa8aa;
  --line: rgba(164, 206, 207, .15);
  --brand: #18c9d2;
  --brand-2: #168ff8;
  --brand-3: #31d991;
  --tefsen-brand-gradient: linear-gradient(105deg, #168ff8, #18c9d2 55%, #31d991);
  --tefsen-brand-gradient-soft: linear-gradient(105deg, rgba(22,143,248,.18), rgba(24,201,210,.14) 55%, rgba(49,217,145,.16));
  --left: 244px;
  --right: 322px;
  --top: 76px;
  --radius: 22px;
  color-scheme: dark;
}

html.tefsen-web-reference body {
  background:
    radial-gradient(circle at 46% -16%, rgba(24,201,210,.07), transparent 32rem),
    #001215;
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

/* Brand treatment: keep the original Tefsen blue -> cyan -> green gradient. */
html.tefsen-web-reference .topbar-brand span b,
html.tefsen-web-reference .mobile-top-brand span b,
html.tefsen-web-reference .auth-brand span {
  background: var(--tefsen-brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent !important;
}

html.tefsen-web-reference .btn-primary,
html.tefsen-web-reference .sidebar-cta .btn-primary,
html.tefsen-web-reference .floating-ask,
html.tefsen-web-reference .ask-btn,
html.tefsen-web-reference .create-mobile.social-create {
  background: var(--tefsen-brand-gradient) !important;
  color: #04191c !important;
  border: 0 !important;
  box-shadow: 0 12px 30px rgba(24, 201, 210, .16);
}

/* ---------- Desktop shell ---------- */
html.tefsen-web-reference .topbar {
  height: var(--top);
  grid-template-columns: var(--left) minmax(360px, 1fr) var(--right);
  background: rgba(0, 18, 21, .94);
  border-bottom: 1px solid rgba(164, 206, 207, .11);
  box-shadow: none;
  backdrop-filter: blur(18px);
}

html.tefsen-web-reference .topbar-brand {
  padding-left: 22px;
  gap: 10px;
  font-weight: 850;
}
html.tefsen-web-reference .topbar-brand img {
  width: 42px;
  height: 42px;
  border-radius: 13px;
}
html.tefsen-web-reference .topbar-brand span b { font-size: 23px; }
html.tefsen-web-reference .topbar-brand span small {
  color: #a9c0c0;
  font-size: 8.5px;
  letter-spacing: .045em;
  margin-top: 4px;
}

html.tefsen-web-reference .topbar-center { padding: 0 28px; }
html.tefsen-web-reference .global-search { max-width: 560px; }
html.tefsen-web-reference .global-search input {
  height: 44px;
  border-radius: 14px;
  background: #071d21;
  border: 1px solid rgba(164, 206, 207, .16);
  color: #edfafa;
  padding-left: 44px;
}
html.tefsen-web-reference .global-search input::placeholder { color: #718b8e; }
html.tefsen-web-reference .global-search input:focus {
  border-color: rgba(24,201,210,.55);
  box-shadow: 0 0 0 3px rgba(24,201,210,.07);
}
html.tefsen-web-reference .global-search .search-kbd { display: none; }
html.tefsen-web-reference .global-search .search-icon { color: #91a9aa; }

html.tefsen-web-reference .topbar-actions {
  padding-right: 24px;
  gap: 10px;
}
html.tefsen-web-reference .icon-button,
html.tefsen-web-reference .top-avatar {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: #071d21;
  border: 1px solid rgba(164, 206, 207, .14);
}
html.tefsen-web-reference .top-avatar {
  border: 2px solid transparent;
  background:
    linear-gradient(#071d21,#071d21) padding-box,
    var(--tefsen-brand-gradient) border-box;
}

html.tefsen-web-reference .sidebar {
  top: var(--top);
  width: var(--left);
  padding: 24px 14px 22px;
  background: rgba(0, 18, 21, .98);
  border-right: 1px solid rgba(164, 206, 207, .10);
}
html.tefsen-web-reference .nav-list { gap: 6px; }
html.tefsen-web-reference .nav-item {
  min-height: 48px;
  border-radius: 14px;
  padding: 0 14px;
  color: #a0b4b6;
  font-size: 14px;
  font-weight: 700;
}
html.tefsen-web-reference .nav-item:hover {
  color: #f4ffff;
  background: rgba(255,255,255,.035);
}
html.tefsen-web-reference .nav-item.active {
  color: #f5ffff;
  border-color: transparent;
  background: var(--tefsen-brand-gradient-soft);
  position: relative;
}
html.tefsen-web-reference .nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 999px;
  background: var(--tefsen-brand-gradient);
}
html.tefsen-web-reference .sidebar-cta { margin-top: 8px; }
html.tefsen-web-reference .sidebar-cta .btn-primary {
  min-height: 50px;
  border-radius: 15px;
  font-size: 14px;
}
html.tefsen-web-reference .sidebar-profile {
  background: #061c20;
  border-color: rgba(164,206,207,.11);
  border-radius: 16px;
}

html.tefsen-web-reference .main-area {
  padding-top: var(--top);
  padding-left: var(--left);
  padding-right: var(--right);
  min-height: 100vh;
}
html.tefsen-web-reference .content-wrap {
  width: min(100%, 700px);
  padding: 0 22px 130px;
}
html.tefsen-web-reference .content-wrap.wide {
  width: min(100%, 1040px);
  padding-top: 24px;
}

/* Right rail: a learning-discovery column, not a clone of another social app. */
html.tefsen-web-reference .rightbar {
  display: block !important;
  top: var(--top);
  width: var(--right);
  padding: 28px 22px 34px;
  background: rgba(0, 18, 21, .86);
  border-left: 1px solid rgba(164,206,207,.08);
}
html.tefsen-web-reference .rightbar .widget {
  border: 0;
  background: transparent;
  box-shadow: none;
  padding: 0 0 22px;
  margin: 0 0 22px;
  border-bottom: 1px solid rgba(164,206,207,.10);
}
html.tefsen-web-reference .rightbar .widget h3 {
  margin: 0 0 14px;
  color: #dceaea;
  font-size: 14px;
  letter-spacing: .01em;
}
html.tefsen-web-reference .rightbar .widget-link {
  border-color: transparent !important;
  border-radius: 14px;
  padding: 10px 8px;
}
html.tefsen-web-reference .rightbar .widget-link:hover { background: rgba(255,255,255,.03) !important; }
html.tefsen-web-reference .rightbar .widget-link b { color: #eaf6f6; font-size: 13px; }
html.tefsen-web-reference .rightbar .widget-link small { color: #7e989a; }
html.tefsen-web-reference .rightbar .trend-number {
  color: #789193;
  font-size: 11px;
  font-weight: 800;
}
html.tefsen-web-reference .footer-mini { color: #617a7d; }

/* ---------- Home feed navigation ---------- */
html.tefsen-web-reference .feed-tabs {
  position: sticky;
  top: var(--top);
  z-index: 20;
  margin: 0 -22px;
  padding: 0 22px;
  min-height: 58px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(0,18,21,.96);
  border-bottom: 1px solid rgba(164,206,207,.12);
  backdrop-filter: blur(18px);
}
html.tefsen-web-reference .feed-tab {
  min-height: 58px;
  border: 0;
  background: transparent;
  color: #7f9799;
  font-size: 13px;
  font-weight: 750;
  position: relative;
}
html.tefsen-web-reference .feed-tab.active { color: #f3ffff; }
html.tefsen-web-reference .feed-tab.active::after {
  content: "";
  position: absolute;
  height: 3px;
  left: 18%;
  right: 18%;
  bottom: -1px;
  border-radius: 999px;
  background: var(--tefsen-brand-gradient);
}

html.tefsen-web-reference .subject-filter-row {
  margin: 0 -22px;
  padding: 16px 22px 10px;
  gap: 9px;
  background: #001215;
}
html.tefsen-web-reference .subject-chip {
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  background: #061c20;
  border: 1px solid rgba(164,206,207,.13);
  color: #91a7a9;
  font-size: 12px;
  font-weight: 700;
}
html.tefsen-web-reference .subject-chip:hover { border-color: rgba(24,201,210,.32); color: #dffafa; }
html.tefsen-web-reference .subject-chip.active {
  border-color: transparent;
  background:
    linear-gradient(#061c20,#061c20) padding-box,
    var(--tefsen-brand-gradient) border-box;
  color: #efffff;
  box-shadow: none;
}
html.tefsen-web-reference .composer-mini { display: none; }

/* ---------- Tefsen Learning Circles ---------- */
html.tefsen-web-reference .learning-circles {
  margin: 0 -22px 18px;
  padding: 14px 22px 18px;
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid rgba(164,206,207,.08);
  background: #001215;
}
html.tefsen-web-reference .learning-circles::-webkit-scrollbar { display: none; }
html.tefsen-web-reference .learning-circle {
  flex: 0 0 72px;
  border: 0;
  background: transparent;
  color: #93aaac;
  padding: 0;
  cursor: pointer;
  display: grid;
  justify-items: center;
  gap: 7px;
}
html.tefsen-web-reference .learning-circle-orb {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  padding: 2px;
  display: grid;
  place-items: center;
  background: var(--tefsen-brand-gradient);
  box-shadow: 0 7px 22px rgba(24,201,210,.10);
}
html.tefsen-web-reference .learning-circle-orb > span {
  width: 100%;
  height: 100%;
  border-radius: inherit;
  display: grid;
  place-items: center;
  background: #061c20;
  color: #eaffff;
  font-size: 20px;
  font-weight: 850;
}
html.tefsen-web-reference .learning-circle small {
  width: 78px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 10px;
  color: inherit;
}
html.tefsen-web-reference .learning-circle:hover { color: #e9ffff; }

/* ---------- Feed cards ---------- */
html.tefsen-web-reference .feed-list {
  display: grid;
  gap: 18px;
}
html.tefsen-web-reference .panel.post-card {
  overflow: hidden;
  border-radius: 20px;
  background: #061c20;
  border: 1px solid rgba(164,206,207,.13);
  box-shadow: 0 12px 36px rgba(0,0,0,.12);
}
html.tefsen-web-reference .panel.post-card:hover {
  transform: none;
  border-color: rgba(24,201,210,.24);
}

html.tefsen-web-reference .post-head {
  padding: 16px 17px 12px;
  gap: 11px;
  align-items: center;
}
html.tefsen-web-reference .post-head > button:first-child,
html.tefsen-web-reference .avatar-route-button {
  border-radius: 50%;
  padding: 2px !important;
  background: var(--tefsen-brand-gradient) !important;
}
html.tefsen-web-reference .post-head > button:first-child .avatar,
html.tefsen-web-reference .post-head > .avatar,
html.tefsen-web-reference .avatar-route-button .avatar {
  width: 43px;
  height: 43px;
  border-radius: 50%;
  border: 2px solid #061c20;
}
html.tefsen-web-reference .post-head-main b {
  color: #effafa;
  font-size: 14px;
}
html.tefsen-web-reference .post-head-main small {
  margin-top: 4px;
  color: #769093;
  font-size: 11px;
}
html.tefsen-web-reference .role-pill {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(22,143,248,.10);
  border-color: rgba(22,143,248,.17);
  color: #74b7ff;
  font-size: 10px;
}
html.tefsen-web-reference .verified-badge { transform: translateY(2px); }
html.tefsen-web-reference .post-menu { color: #7e9799; }

html.tefsen-web-reference .post-body {
  padding: 6px 18px 16px;
}
html.tefsen-web-reference .post-subject {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  background: var(--tefsen-brand-gradient-soft);
  color: #7ce6df;
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 800;
}
html.tefsen-web-reference .post-body h3,
html.tefsen-web-reference .post-body h1 {
  color: #f4fbfb;
  margin: 12px 0 8px;
  letter-spacing: -.025em;
  line-height: 1.28;
}
html.tefsen-web-reference .post-body h3 { font-size: 18px; }
html.tefsen-web-reference .post-body h1 { font-size: 25px; }
html.tefsen-web-reference .post-body p {
  margin: 0 0 12px;
  color: #c9d9da;
  font-size: 14px;
  line-height: 1.65;
}
html.tefsen-web-reference .tag-row { gap: 7px; }
html.tefsen-web-reference .tag { color: #55cfd1; background: transparent; border: 0; padding: 0; font-size: 12px; }

/* Media becomes the visual anchor when a learner includes an image. */
html.tefsen-web-reference .post-body .post-image,
html.tefsen-web-reference .post-body .post-image-grid {
  width: calc(100% + 36px);
  max-width: none;
  margin-left: -18px;
  margin-right: -18px;
  margin-top: 14px;
  margin-bottom: -16px;
  border-radius: 0;
  border-left: 0;
  border-right: 0;
}
html.tefsen-web-reference .post-image-grid img { border-radius: 0; }

html.tefsen-web-reference .post-actions {
  min-height: 58px;
  padding: 7px 11px;
  border-top: 1px solid rgba(164,206,207,.09);
  background: #05191d;
  display: flex;
  align-items: center;
  gap: 3px;
}
html.tefsen-web-reference .post-actions .action-btn {
  min-height: 42px;
  min-width: 44px;
  padding: 0 10px;
  border-radius: 12px;
  color: #c8d7d8;
  font-size: 12px;
}
html.tefsen-web-reference .post-actions .action-btn:hover { background: rgba(255,255,255,.035); }
html.tefsen-web-reference .post-actions .action-btn.like.active { color: #ff4679; }
html.tefsen-web-reference .post-actions .action-btn:nth-child(1) { order: 1; }
html.tefsen-web-reference .post-actions .action-btn:nth-child(2) { order: 2; }
html.tefsen-web-reference .post-actions .action-btn:nth-child(4) { order: 3; font-size: 0; }
html.tefsen-web-reference .post-actions .action-btn:nth-child(3) { order: 4; margin-left: auto; font-size: 0; }
html.tefsen-web-reference .post-actions .action-btn:nth-child(3) svg,
html.tefsen-web-reference .post-actions .action-btn:nth-child(4) svg { width: 20px; height: 20px; }

html.tefsen-web-reference .floating-ask {
  right: calc(var(--right) + 28px);
  bottom: 28px;
  min-width: 178px;
  min-height: 54px;
  padding: 0 20px;
  border-radius: 17px;
  font-size: 14px;
  font-weight: 850;
}

/* Empty states keep the feed feeling purposeful. */
html.tefsen-web-reference .academic-empty,
html.tefsen-web-reference .notification-empty,
html.tefsen-web-reference .leaderboard-empty {
  min-height: 420px;
  background: transparent;
}

/* Other screens inherit the same visual language. */
html.tefsen-web-reference .panel:not(.post-card),
html.tefsen-web-reference .dropdown.profile-dropdown,
html.tefsen-web-reference .modal {
  background: #061c20;
  border-color: rgba(164,206,207,.13);
  box-shadow: 0 18px 55px rgba(0,0,0,.16);
}
html.tefsen-web-reference .page-head h1 { color: #effafa; }
html.tefsen-web-reference .page-head p { color: #849d9f; }
html.tefsen-web-reference .input,
html.tefsen-web-reference .textarea,
html.tefsen-web-reference .select {
  background: #04171a;
  border-color: rgba(164,206,207,.15);
}

/* ---------- Tablet ---------- */
@media (max-width: 1220px) {
  html.tefsen-web-reference.tefsen-android-parity { --right: 0px; }
  html.tefsen-web-reference .rightbar { display: none !important; }
  html.tefsen-web-reference .main-area { padding-right: 0; }
  html.tefsen-web-reference .floating-ask { right: 28px; }
}

@media (max-width: 960px) {
  html.tefsen-web-reference.tefsen-android-parity { --left: 0px; --top: 72px; }
  html.tefsen-web-reference body { padding-bottom: 82px; }
  html.tefsen-web-reference .sidebar { display: none !important; }
  html.tefsen-web-reference .main-area { padding-left: 0; }
  html.tefsen-web-reference .topbar {
    display: flex;
    gap: 12px;
    padding: 0 18px;
  }
  html.tefsen-web-reference .topbar-brand { display: flex; padding-left: 0; min-width: max-content; }
  html.tefsen-web-reference .topbar-brand span small { display: none; }
  html.tefsen-web-reference .topbar-center { flex: 1; padding: 0; }
  html.tefsen-web-reference .topbar-actions { padding-right: 0; }
  html.tefsen-web-reference .mobile-top-brand { display: none !important; }

  html.tefsen-web-reference .mobile-bottom {
    position: fixed;
    z-index: 150;
    left: 0;
    right: 0;
    bottom: 0;
    height: 78px;
    padding: 6px 16px max(8px, env(safe-area-inset-bottom));
    background: rgba(0,18,21,.98);
    border-top: 1px solid rgba(164,206,207,.11);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    backdrop-filter: blur(18px);
  }
  html.tefsen-web-reference .mobile-bottom > button,
  html.tefsen-web-reference .mobile-bottom .create-mobile {
    width: 100%;
    height: 58px;
    border: 0;
    border-radius: 0;
    background: transparent !important;
    box-shadow: none;
    color: #789092 !important;
  }
  html.tefsen-web-reference .mobile-bottom > button.active { color: #3ad7d0 !important; }
  html.tefsen-web-reference .mobile-bottom .create-mobile {
    position: relative;
  }
  html.tefsen-web-reference .mobile-bottom .create-mobile svg {
    width: 28px;
    height: 28px;
    padding: 5px;
    box-sizing: content-box;
    border-radius: 12px;
    background: var(--tefsen-brand-gradient);
    color: #04191c;
  }
  html.tefsen-web-reference .floating-ask { bottom: 94px; }
}

/* ---------- Mobile ---------- */
@media (max-width: 700px) {
  html.tefsen-web-reference.tefsen-android-parity { --top: 64px; }
  html.tefsen-web-reference .topbar { padding: 0 13px; gap: 8px; }
  html.tefsen-web-reference .topbar-brand img { width: 37px; height: 37px; border-radius: 11px; }
  html.tefsen-web-reference .topbar-brand span b { font-size: 20px; }
  html.tefsen-web-reference .topbar-center { margin-left: auto; flex: 0 1 auto; }
  html.tefsen-web-reference .global-search input { display: none; }
  html.tefsen-web-reference .global-search .search-icon {
    position: static;
    transform: none;
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: #061c20;
  }
  html.tefsen-web-reference .topbar-actions .icon-button { display: none !important; }
  html.tefsen-web-reference .top-avatar { width: 40px !important; height: 40px !important; }

  html.tefsen-web-reference .content-wrap,
  html.tefsen-web-reference .content-wrap.wide {
    width: 100%;
    padding: 0 0 112px;
  }
  html.tefsen-web-reference .feed-tabs {
    margin: 0;
    padding: 0 6px;
    min-height: 52px;
  }
  html.tefsen-web-reference .feed-tab { min-height: 52px; font-size: 11.5px; }
  html.tefsen-web-reference .feed-tab.active::after { left: 20%; right: 20%; }

  html.tefsen-web-reference .subject-filter-row {
    margin: 0;
    padding: 12px 13px 8px;
  }
  html.tefsen-web-reference .subject-chip { min-height: 34px; padding: 0 12px; font-size: 11px; }

  html.tefsen-web-reference .learning-circles {
    margin: 0 0 12px;
    padding: 12px 13px 15px;
    gap: 12px;
  }
  html.tefsen-web-reference .learning-circle { flex-basis: 64px; }
  html.tefsen-web-reference .learning-circle-orb { width: 54px; height: 54px; }
  html.tefsen-web-reference .learning-circle small { width: 66px; font-size: 9.5px; }

  html.tefsen-web-reference .feed-list { gap: 10px; }
  html.tefsen-web-reference .panel.post-card {
    border-left: 0;
    border-right: 0;
    border-radius: 0;
    box-shadow: none;
  }
  html.tefsen-web-reference .post-head { padding: 13px 14px 10px; }
  html.tefsen-web-reference .post-head > button:first-child .avatar,
  html.tefsen-web-reference .post-head > .avatar,
  html.tefsen-web-reference .avatar-route-button .avatar { width: 40px; height: 40px; }
  html.tefsen-web-reference .post-head-main b { font-size: 13.5px; }
  html.tefsen-web-reference .post-body { padding: 5px 14px 14px; }
  html.tefsen-web-reference .post-body h3 { font-size: 17px; }
  html.tefsen-web-reference .post-body p { font-size: 13.5px; line-height: 1.58; }
  html.tefsen-web-reference .post-body .post-image,
  html.tefsen-web-reference .post-body .post-image-grid {
    width: calc(100% + 28px);
    margin-left: -14px;
    margin-right: -14px;
    margin-bottom: -14px;
  }
  html.tefsen-web-reference .post-actions { min-height: 56px; border-radius: 0; }
  html.tefsen-web-reference .post-actions .action-btn { padding: 0 9px; }

  html.tefsen-web-reference .floating-ask {
    right: 14px;
    bottom: 91px;
    min-width: 0;
    width: 52px;
    height: 52px;
    min-height: 52px;
    padding: 0;
    border-radius: 16px;
  }
  html.tefsen-web-reference .floating-ask span { display: none; }

  html.tefsen-web-reference .page-head,
  html.tefsen-web-reference .content-wrap > .panel:not(.post-card),
  html.tefsen-web-reference .content-wrap > .academic-achievements,
  html.tefsen-web-reference .content-wrap > .questions-asked-panel {
    margin-left: 13px;
    margin-right: 13px;
  }
}