/* ===========================
   OSINT HUB - Main Stylesheet
   =========================== */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #1c2128;
  --bg-hover: #252d3a;
  --accent: #00d4ff;
  --accent-secondary: #00ff9d;
  --accent-warning: #ff6b35;
  --accent-danger: #ff3860;
  --accent-purple: #bd93f9;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --border: #30363d;
  --border-hover: #484f58;
  --glow: rgba(0, 212, 255, 0.15);
  --glow-green: rgba(0, 255, 157, 0.15);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --radius: 10px;
  --radius-lg: 16px;
  --transition: all 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
a:hover { color: var(--accent-secondary); text-decoration: none; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== NAVBAR ===== */
nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 1rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  white-space: nowrap;
}

.nav-logo svg { width: 28px; height: 28px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--glow);
}

.nav-search {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.3rem 0.75rem;
  gap: 0.5rem;
  min-width: 220px;
  flex-shrink: 0;
}

.nav-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  width: 100%;
}

.nav-search input::placeholder { color: var(--text-muted); }
.nav-search svg { color: var(--text-muted); flex-shrink: 0; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #0d1117 0%, #0d2137 50%, #0d1117 100%);
  border-bottom: 1px solid var(--border);
  padding: 5rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--accent);
  padding: 0.35rem 1rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 2.5rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.stat {
  text-align: center;
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-search {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.hero-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

.hero-search input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 1rem 1.25rem;
  color: var(--text-primary);
  font-size: 1rem;
}

.hero-search input::placeholder { color: var(--text-muted); }

.hero-search button {
  background: var(--accent);
  border: none;
  color: var(--bg-primary);
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.9rem;
  transition: var(--transition);
}

.hero-search button:hover { background: var(--accent-secondary); }

/* ===== MAIN LAYOUT ===== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

main { padding: 3rem 2rem; }
main .container { padding: 0; }

/* ===== SECTION TITLES ===== */
.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.section-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.section-header h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
}

.section-header .badge {
  font-size: 0.75rem;
  background: var(--bg-card);
  color: var(--text-muted);
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  border: 1px solid var(--border);
}

.section-block {
  margin-bottom: 3.5rem;
}

/* ===== CATEGORY TABS ===== */
.cat-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.cat-tab {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.45rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.cat-tab:hover,
.cat-tab.active {
  background: var(--glow);
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== CARDS GRID ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.cards-grid-sm {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--glow);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.card-icon {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.card-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.tag {
  font-size: 0.72rem;
  padding: 0.15rem 0.55rem;
  border-radius: 50px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg-secondary);
}

.tag.free { border-color: rgba(0,255,157,0.4); color: var(--accent-secondary); }
.tag.freemium { border-color: rgba(255,107,53,0.4); color: var(--accent-warning); }
.tag.paid { border-color: rgba(255,56,96,0.4); color: var(--accent-danger); }
.tag.cli { border-color: rgba(189,147,249,0.4); color: var(--accent-purple); }
.tag.web { border-color: rgba(0,212,255,0.4); color: var(--accent); }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.card-link:hover { color: var(--accent-secondary); }

/* ===== TOOL GUIDE CARDS ===== */
.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

.guide-card:hover { border-color: var(--border-hover); }

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  cursor: pointer;
  background: var(--bg-secondary);
}

.guide-card-header:hover { background: var(--bg-hover); }

.guide-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.guide-title { font-size: 1.1rem; font-weight: 700; }
.guide-subtitle { font-size: 0.85rem; color: var(--text-secondary); }

.guide-chevron {
  margin-left: auto;
  color: var(--text-muted);
  transition: transform 0.3s;
}

.guide-card.open .guide-chevron { transform: rotate(180deg); }

.guide-body {
  padding: 1.5rem;
  display: none;
  border-top: 1px solid var(--border);
}

.guide-card.open .guide-body { display: block; }

.guide-section { margin-bottom: 1.5rem; }
.guide-section h4 { color: var(--accent); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.75rem; }

.code-block {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  overflow-x: auto;
  margin-bottom: 0.75rem;
  position: relative;
}

.code-block .comment { color: var(--text-muted); }
.code-block .cmd { color: var(--accent-secondary); }
.code-block .flag { color: var(--accent-warning); }
.code-block .val { color: var(--accent-purple); }

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
}

.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* ===== LINKS LIST ===== */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 0.75rem;
}

.link-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: var(--transition);
  color: var(--text-primary);
}

.link-item:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
  color: var(--accent);
}

.link-favicon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.link-name {
  font-size: 0.9rem;
  font-weight: 600;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.link-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== ALERT BOX ===== */
.alert {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.alert-info { background: rgba(0,212,255,0.1); border: 1px solid rgba(0,212,255,0.3); }
.alert-warning { background: rgba(255,107,53,0.1); border: 1px solid rgba(255,107,53,0.3); }
.alert-danger { background: rgba(255,56,96,0.1); border: 1px solid rgba(255,56,96,0.3); }
.alert-success { background: rgba(0,255,157,0.1); border: 1px solid rgba(0,255,157,0.3); }

.alert-icon { font-size: 1.1rem; flex-shrink: 0; }
.alert-info .alert-icon { color: var(--accent); }
.alert-warning .alert-icon { color: var(--accent-warning); }
.alert-danger .alert-icon { color: var(--accent-danger); }
.alert-success .alert-icon { color: var(--accent-secondary); }

/* ===== METHODOLOGY ===== */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: var(--transition);
}

.step:hover { border-color: var(--border-hover); }

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--glow);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent);
  flex-shrink: 0;
}

.step-title { font-weight: 700; margin-bottom: 0.2rem; }
.step-desc { font-size: 0.85rem; color: var(--text-secondary); }

/* ===== RESOURCE TABLE ===== */
.res-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.res-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

.res-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.res-table tr:hover td { background: var(--bg-hover); }
.res-table tr:last-child td { border-bottom: none; }

/* ===== SEARCH RESULTS ===== */
#search-results {
  position: fixed;
  top: 65px;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 700px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  z-index: 999;
  max-height: 70vh;
  overflow-y: auto;
  display: none;
}

#search-results.active { display: block; }

.search-result-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.search-result-item:hover { background: var(--bg-hover); }
.search-result-item:last-child { border-bottom: none; }

.sri-title { font-weight: 700; font-size: 0.9rem; margin-bottom: 0.15rem; }
.sri-desc { font-size: 0.8rem; color: var(--text-secondary); }
.sri-type {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 50px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  white-space: nowrap;
  height: fit-content;
}

/* ===== TOP BAR ===== */
.top-bar {
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  color: var(--bg-primary);
  text-align: center;
  padding: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  margin-top: 2rem;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col ul a { color: var(--text-secondary); font-size: 0.875rem; }
.footer-col ul a:hover { color: var(--accent); }

.footer-bottom {
  max-width: 1400px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== BACK TO TOP ===== */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.4);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 500;
}

#back-to-top.visible { opacity: 1; pointer-events: all; }
#back-to-top:hover { background: var(--accent-secondary); transform: translateY(-3px); }

/* ===== UTILITY ===== */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-muted { color: var(--text-muted); font-size: 0.85rem; }
.text-accent { color: var(--accent); }
.text-green { color: var(--accent-secondary); }
.text-warning { color: var(--accent-warning); }
.text-danger { color: var(--accent-danger); }
.bold { font-weight: 700; }

.hidden { display: none !important; }

/* pill button */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}
.btn-primary:hover { background: var(--accent-secondary); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ===== COLOR CLASSES for icons ===== */
.ic-blue   { background: rgba(0,212,255,0.15); color: var(--accent); }
.ic-green  { background: rgba(0,255,157,0.15); color: var(--accent-secondary); }
.ic-orange { background: rgba(255,107,53,0.15); color: var(--accent-warning); }
.ic-red    { background: rgba(255,56,96,0.15);  color: var(--accent-danger); }
.ic-purple { background: rgba(189,147,249,0.15);color: var(--accent-purple); }
.ic-yellow { background: rgba(255,215,0,0.15);  color: #ffd700; }
.ic-teal   { background: rgba(0,206,209,0.15);  color: #00ced1; }
.ic-pink   { background: rgba(255,105,180,0.15);color: #ff69b4; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav-search { display: none; }
}

@media (max-width: 700px) {
  .nav-links { display: none; }
  .hero { padding: 3rem 1rem 2.5rem; }
  .hero-stats { gap: 1.5rem; }
  main { padding: 2rem 1rem; }
  .cards-grid { grid-template-columns: 1fr; }
  .links-grid { grid-template-columns: 1fr; }
}

/* ===== PAGE HEADER (non-index) ===== */
.page-hero {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 3rem 2rem;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.page-hero h1 span { color: var(--accent); }

.page-hero p {
  color: var(--text-secondary);
  max-width: 600px;
  font-size: 1rem;
}

/* ===== TWO-COLUMN LAYOUT ===== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 800px) {
  .two-col { grid-template-columns: 1fr; }
}

/* ===== CHECKLIST ===== */
.checklist { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.checklist li::before {
  content: '▸';
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

/* ===== PULSE ANIMATION ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse { animation: pulse 2s infinite; }

/* ===== PROGRESS BAR ===== */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  z-index: 9999;
  transition: width 0.1s;
  width: 0%;
}