:root {
  --bg-primary: #0b0f19;
  --bg-card: #151d30;
  --bg-card-hover: #1b2640;
  --bg-input: #1a233a;
  --accent: #ff6633;
  --accent-blue: #3b82f6;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #24324f;
  --border-light: #334155;
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* PortSwigger Web Security Academy Top Strip */
.academy-header-strip {
  background: #0f172a;
  border-bottom: 1px solid var(--border);
  padding: 12px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.lab-pill-group {
  display: flex;
  align-items: center;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 20px;
  padding: 3px 12px 3px 8px;
  gap: 6px;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.5px;
}

.lab-pill-icon {
  font-size: 1rem;
}

.lab-pill-type {
  color: #38bdf8;
}

.lab-info-block {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.difficulty-tag {
  background: #15803d;
  color: #dcfce7;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.lab-title-text {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
}

.lab-title-text code {
  font-family: var(--font-mono);
  background: rgba(255,255,255,0.08);
  padding: 1px 6px;
  border-radius: 4px;
  color: #38bdf8;
}

.lab-status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

.lab-status.unsolved {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.lab-status.solved {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid #10b981;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
}

/* Navbar */
.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 14px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand span {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 400;
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}

.nav-links {
  display: flex;
  gap: 20px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
}

/* Main Container */
.container {
  max-width: 960px;
  margin: 36px auto;
  padding: 0 20px;
  flex: 1;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.portal-heading {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.portal-sub {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.5;
  margin-bottom: 24px;
}

/* Search Form */
.search-form {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.search-input-wrap {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px 12px 44px;
  font-size: 0.95rem;
  color: #fff;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.btn-search {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0 26px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn-search:hover {
  background: #1d4ed8;
}

/* Search Message Box */
.search-message-container {
  margin-top: 10px;
}

.search-result-banner {
  background: rgba(37, 99, 235, 0.1);
  border-left: 4px solid #2563eb;
  padding: 12px 18px;
  border-radius: 4px;
  color: var(--text-main);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.search-term {
  color: #60a5fa;
  font-weight: 600;
}

/* Solved Vault Box */
.vault-box {
  background: var(--success-bg);
  border: 1px solid var(--success);
  padding: 22px;
  border-radius: 10px;
  margin-top: 24px;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.vault-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.vault-icon {
  font-size: 1.8rem;
}

.vault-title {
  color: var(--success);
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 2px;
}

.vault-desc {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.flag-wrap {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(16, 185, 129, 0.2);
}

.flag-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.flag-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: #00ff88;
  background: rgba(0, 255, 136, 0.12);
  border: 1px dashed #00ff88;
  padding: 8px 16px;
  border-radius: 6px;
  letter-spacing: 0.5px;
}

/* Articles Section */
.articles-section {
  margin-top: 32px;
}

.articles-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.articles-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff;
}

.articles-count {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.posts-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  transition: all 0.2s ease;
}

.article-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.article-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.article-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-summary {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}