:root{
  --bg:#f7faf9;
  --surface:#ffffff;
  --surface-2:#f0f7f4;
  --text:#18312a;
  --muted:#5d746c;
  --brand:#0aa36a;
  --brand-dark:#087c51;
  --brand-soft:#dff6ec;
  --border:#dce9e3;
  --shadow:0 10px 30px rgba(16, 53, 42, 0.08);
  --radius:18px;
  --max:1180px;
}

*{
  box-sizing:border-box;
}

html,
body{
  margin:0;
  padding:0;
}

body{
  font-family:Arial, Helvetica, sans-serif;
  background:linear-gradient(180deg,#f8fbfa 0%, #f4f8f7 100%);
  color:var(--text);
  line-height:1.6;
}

/* Base */
a{
  color:var(--brand-dark);
  text-decoration:none;
}

a:hover{
  text-decoration:underline;
}

img{
  max-width:100%;
  display:block;
}

.container{
  width:min(var(--max), calc(100% - 32px));
  margin:0 auto;
}

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

/* Navbar */
.nav{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(255,255,255,0.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}

.nav-inner{
  width:min(var(--max), calc(100% - 32px));
  margin:0 auto;
  min-height:88px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}

.brand{
  display:flex;
  align-items:center;
  gap:16px;
  text-decoration:none;
  color:var(--text);
  min-width:0;
}

.brand:hover{
  text-decoration:none;
}

.logo{
  height:150px;
  width:auto;
  object-fit:contain;
  filter:drop-shadow(0 2px 6px rgba(0,0,0,0.12));
  transition:transform .2s ease;
  flex-shrink:0;
}

.brand:hover .logo{
  transform:scale(1.04);
}

.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.1;
}

.brand-text strong{
  font-size:1rem;
  color:var(--text);
}

.brand-text span{
  font-size:.78rem;
  color:var(--muted);
}

.nav-links{
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
}

.nav-links a{
  color:var(--text);
  font-weight:600;
  text-decoration:none;
}

.nav-links a:hover{
  color:var(--brand-dark);
  text-decoration:none;
}

.nav-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
}

.user-info{
  font-size:.95rem;
  white-space:nowrap;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:none;
  border-radius:999px;
  padding:12px 18px;
  font-weight:700;
  cursor:pointer;
  text-decoration:none;
  transition:background .2s ease, color .2s ease, border-color .2s ease, transform .15s ease;
}

.btn:hover{
  text-decoration:none;
}

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

.btn-primary{
  background:var(--brand);
  color:#fff;
}

.btn-primary:hover{
  background:var(--brand-dark);
  color:#fff;
}

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

.btn-secondary:hover{
  background:var(--surface-2);
  color:var(--text);
}

.inline-form{
  display:inline;
}

/* Hero */
.hero{
  padding:56px 0 28px;
}

.hero-grid{
  display:grid;
  grid-template-columns:1.2fr 0.8fr;
  gap:24px;
}

.hero-main{
  padding:34px;
  background:
    radial-gradient(circle at top right, rgba(10,163,106,0.12), transparent 35%),
    linear-gradient(180deg,#ffffff 0%, #f8fcfa 100%);
}

.hero-side{
  padding:24px;
  display:grid;
  gap:16px;
}

.hero h1{
  margin:0 0 14px;
  font-size:clamp(2rem, 4vw, 3.4rem);
  line-height:1.08;
}

.hero p{
  margin:0 0 22px;
  color:var(--muted);
  font-size:1.08rem;
}

.kicker{
  display:inline-block;
  padding:8px 12px;
  border-radius:999px;
  background:var(--brand-soft);
  color:var(--brand-dark);
  font-size:.92rem;
  font-weight:700;
  margin-bottom:14px;
}

/* Cards */
.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.page-card{
  padding:28px;
}

.page-card h1{
  margin-top:0;
}

.quick-card,
.topic-card,
.term-card,
.category-card,
.community-card,
.podium-card,
.sidebar-card,
.main-term-card{
  padding:22px;
}

.main-term-card{
  padding:28px;
}

.sidebar-card{
  padding:20px;
}

/* Forms */
.input{
  width:100%;
  padding:14px 16px;
  border:1px solid var(--border);
  border-radius:14px;
  background:#fff;
  font-size:1rem;
  color:var(--text);
}

textarea.input{
  resize:vertical;
  min-height:120px;
}

.search-bar{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}

.search-bar .input{
  flex:1 1 280px;
}

.search-wrap{
  position:relative;
  flex:1 1 280px;
}

/* Search suggestions */
.search-suggestions{
  position:absolute;
  top:calc(100% + 8px);
  left:0;
  right:0;
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  box-shadow:var(--shadow);
  z-index:50;
  overflow:hidden;
}

.search-suggestions.hidden{
  display:none;
}

.search-suggestion-item{
  display:block;
  padding:14px 16px;
  border-bottom:1px solid var(--border);
  color:var(--text);
  text-decoration:none;
}

.search-suggestion-item:last-child{
  border-bottom:none;
}

.search-suggestion-item:hover,
.search-suggestion-item.active{
  background:var(--surface-2);
  text-decoration:none;
}

.search-suggestion-title{
  font-weight:700;
}

.search-suggestion-meta{
  margin-top:4px;
  font-size:.92rem;
  color:var(--muted);
}

/* Stats */
.stat-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
}

.stat-box{
  padding:18px;
  border-radius:16px;
  background:var(--surface-2);
  border:1px solid var(--border);
}

.stat-box strong{
  display:block;
  font-size:1.35rem;
  margin-top:6px;
}

/* Sections */
.section{
  padding:18px 0 26px;
}

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

.section-title h2{
  margin:0;
  font-size:1.6rem;
}

.section-title p{
  margin:4px 0 0;
  color:var(--muted);
}

/* Grids */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}

.two-col{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}

.term-layout{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:24px;
  align-items:start;
}

.sidebar-stack{
  display:grid;
  gap:18px;
}

/* Podium */
.podium{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}

.podium-card{
  text-align:center;
}

.medal{
  font-size:2rem;
  margin-bottom:8px;
}

.podium-card .place{
  font-size:.92rem;
  color:var(--muted);
  margin-bottom:6px;
}

.podium-card .name{
  font-size:1.15rem;
  font-weight:800;
  margin-bottom:6px;
}

.podium-card .score{
  color:var(--brand-dark);
  font-weight:700;
}

/* Lists */
.list-clean{
  list-style:none;
  padding:0;
  margin:0;
}

.list-clean li + li{
  margin-top:12px;
}

.topic-meta,
.term-meta{
  font-size:.92rem;
  color:var(--muted);
}

/* Notices */
.notice{
  padding:18px 20px;
  background:var(--brand-soft);
  border:1px solid #cdebdc;
  border-radius:16px;
  color:var(--brand-dark);
}

/* Footer */
.footer{
  margin-top:40px;
  border-top:1px solid var(--border);
  padding:30px 0 50px;
  color:var(--muted);
  font-size:.95rem;
}

/* Page spacing */
.page-wrap{
  padding:28px 0 40px;
}

/* Responsive */
@media (max-width: 1100px){
  .nav-inner{
    gap:16px;
  }

  .brand-text strong{
    font-size:.95rem;
  }

  .nav-links{
    gap:14px;
  }
}

@media (max-width: 980px){
  .hero-grid,
  .grid-3,
  .podium,
  .two-col,
  .term-layout{
    grid-template-columns:1fr;
  }

  .nav-inner{
    padding:14px 0;
    align-items:flex-start;
    flex-direction:column;
    min-height:auto;
  }

  .nav-links,
  .nav-actions{
    width:100%;
  }

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

@media (max-width: 768px){
  .logo{
    height:52px;
  }

  .brand-text{
    display:none;
  }

  .container,
  .nav-inner{
    width:min(var(--max), calc(100% - 20px));
  }
}

@media (max-width: 640px){
  .hero-main,
  .hero-side,
  .quick-card,
  .topic-card,
  .term-card,
  .category-card,
  .community-card,
  .podium-card,
  .page-card,
  .sidebar-card,
  .main-term-card{
    padding:18px;
  }

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

  .btn{
    width:auto;
    max-width:100%;
  }
}
.stat-box strong.count-up {
  display: inline-block;
  font-size: 1.8rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  transition: transform 0.2s ease;
}
.site-home {
  background:
      radial-gradient(circle at top left, rgba(10, 163, 106, 0.08), transparent 30%),
      radial-gradient(circle at top right, rgba(10, 163, 106, 0.05), transparent 25%),
      #f7faf8;
}

.home-page {
  padding-bottom: 2rem;
}

.hero-home {
  padding: 2.5rem 0 1.25rem;
}

.hero-main,
.hero-side,
.topic-card,
.term-card,
.category-card,
.community-card,
.page-card,
.quick-stack,
.side-list-card {
  border-radius: 22px;
  border: 1px solid rgba(10, 163, 106, 0.10);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.05);
  background: #fff;
}

.hero-main {
  padding: 2rem;
  background: linear-gradient(135deg, #ffffff 0%, #f4fbf7 100%);
}

.hero-main h1 {
  margin: 0.6rem 0 1rem;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
}

.hero-text {
  max-width: 60ch;
  font-size: 1.05rem;
  line-height: 1.65;
  color: #4b6358;
}

.kicker {
  display: inline-block;
  padding: 0.42rem 0.85rem;
  border-radius: 999px;
  background: rgba(10, 163, 106, 0.10);
  color: #0a7d54;
  font-weight: 700;
  font-size: 0.9rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.1rem 0 1.5rem;
}

.hero-badges span {
  padding: 0.55rem 0.85rem;
  background: #fff;
  border: 1px solid #e3efe8;
  border-radius: 999px;
  color: #355246;
  font-size: 0.92rem;
}

.search-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: stretch;
  margin-top: 1.2rem;
}

.search-wrap {
  flex: 1 1 420px;
  position: relative;
}

.search-bar .input {
  min-height: 54px;
  border-radius: 14px;
  border: 1px solid #d8e7de;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.03);
}

.search-bar .btn {
  min-height: 54px;
  border-radius: 14px;
  padding: 0 1.15rem;
}

.search-suggestions {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid #dce8e1;
  border-radius: 14px;
  box-shadow: 0 12px 28px rgba(0,0,0,0.08);
  overflow: hidden;
  z-index: 30;
}

.search-suggestions.hidden {
  display: none;
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) 360px;
  gap: 1.5rem;
  align-items: start;
}

.home-main-col,
.home-side-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.home-side-col {
  position: sticky;
  top: 90px;
}

.side-section {
  display: block;
}

.section {
  padding: 0;
}

.section-title {
  margin-bottom: 1rem;
}

.section-title h2 {
  margin-bottom: 0.35rem;
}

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

.topic-card,
.term-card,
.category-card,
.community-card,
.page-card,
.quick-stack,
.side-list-card,
.hero-side {
  padding: 1.35rem;
}

.hero-side-head,
.side-card-title {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.9rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
}

.stat-box {
  background: linear-gradient(180deg, #ffffff 0%, #f6fbf8 100%);
  border: 1px solid #e2eee7;
  border-radius: 18px;
  padding: 0.95rem;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.stat-box:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 22px rgba(0,0,0,0.06);
}

.stat-box strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.7rem;
  line-height: 1;
  color: #123d2d;
  font-variant-numeric: tabular-nums;
}

.notice {
  margin-top: 1rem;
  padding: 0.95rem;
  border-radius: 16px;
  background: rgba(10, 163, 106, 0.08);
  border: 1px solid rgba(10, 163, 106, 0.12);
  color: #23463a;
}

.quick-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.quick-link-item {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  padding: 0.85rem 0.9rem;
  border: 1px solid #e7efea;
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  background: #fbfdfc;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.quick-link-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
  border-color: rgba(10, 163, 106, 0.18);
}

.quick-link-item span {
  font-size: 1.4rem;
  line-height: 1;
}

.quick-link-item small {
  display: block;
  color: #6d7f76;
  margin-top: 0.15rem;
}

.community-card {
  background: linear-gradient(135deg, #ffffff 0%, #f4fbf7 100%);
}

.list-clean {
  list-style: none;
  margin: 0;
  padding: 0;
}

.list-clean li + li {
  border-top: 1px solid #edf2ef;
  margin-top: 1rem;
  padding-top: 1rem;
}

.compact-list li + li {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
}

.member-row {
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

.member-rank {
  font-size: 1.2rem;
}

.member-info small,
.small-text {
  display: block;
  margin-top: 0.15rem;
  color: #6e8076;
}

.topic-card h3 a,
.term-card h3 a,
.category-card h3 a,
.page-card a {
  text-decoration: none;
  color: inherit;
}

.topic-card h3 a:hover,
.term-card h3 a:hover,
.category-card h3 a:hover,
.page-card a:hover {
  color: var(--brand);
}

.topic-meta,
.term-meta {
  color: #687b71;
  font-size: 0.94rem;
  line-height: 1.5;
}

@media (max-width: 1100px) {
  .home-layout {
      grid-template-columns: 1fr;
  }

  .home-side-col {
      position: static;
  }
}

@media (max-width: 700px) {
  .grid-2,
  .stat-grid {
      grid-template-columns: 1fr;
  }

  .hero-main {
      padding: 1.3rem;
  }

  .hero-badges {
      flex-direction: column;
  }

  .search-bar {
      flex-direction: column;
  }

  .search-bar .btn,
  .search-wrap {
      width: 100%;
  }
}
.nav-messages-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  background: #d93025;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
}
.nav-messages-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-link-text {
  position: relative;
}

.nav-badge {
  position: absolute;
  top: -6px;
  right: -10px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #e53935;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}