/* ============================================
   PassivePin - DePIN Directory Styles
   Modern, clean, responsive, dark/light mode
   ============================================ */

/* ── CSS Variables ── */
:root {
  --bg: #0b0d14;
  --surface: #11131c;
  --surface-2: #181b27;
  --surface-3: #1e2231;
  --text: #f0f1f5;
  --text-2: #a0a6b8;
  --text-3: #6b7280;
  --primary: #6366f1;
  --primary-2: #4f46e5;
  --primary-soft: rgba(99,102,241,0.12);
  --accent: #06b6d4;
  --accent-2: #8b5cf6;
  --accent-green: #10b981;
  --accent-pink: #ec4899;
  --accent-orange: #f59e0b;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border: #252a3d;
  --border-light: #2d3347;
  --glow-primary: rgba(99,102,241,0.25);
  --glow-accent: rgba(6,182,212,0.2);
  --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.4), 0 0 0 1px var(--border-light);
  --shadow-glow: 0 0 30px var(--glow-primary), 0 0 60px var(--glow-accent);
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.2s ease;
  --font: 'Inter', 'JetBrains Mono', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --max-width: 1280px;
  --header-h: 68px;
}

[data-theme="light"] {
  --bg: #f8f9fd;
  --surface: #ffffff;
  --surface-2: #f0f2f8;
  --surface-3: #e8eaf2;
  --text: #0f1221;
  --text-2: #4a4f66;
  --text-3: #7a8099;
  --border: #e2e5ed;
  --border-light: #d1d5e0;
  --glow-primary: rgba(99,102,241,0.12);
  --glow-accent: rgba(6,182,212,0.08);
  --shadow: 0 1px 3px rgba(15,18,33,0.06), 0 4px 12px rgba(15,18,33,0.04);
  --shadow-lg: 0 8px 24px rgba(15,18,33,0.08);
  --shadow-glow: 0 0 20px var(--glow-primary), 0 0 40px var(--glow-accent);
}

/* ── Reset / Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img { max-width: 100%; display: block; }
input, select, textarea { font-family: inherit; }

/* ── Typography ── */
h1, h2, h3, h4 { letter-spacing: -0.02em; line-height: 1.2; }

/* ── Layout ── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ── Header ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(17,19,28,0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  transition: background var(--transition);
}
[data-theme="light"] .site-header { background: rgba(255,255,255,0.85); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em;
}
.logo-icon { font-size: 1.4rem; filter: drop-shadow(0 1px 2px rgba(0,0,0,0.08)); }
.logo-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.main-nav { display: flex; gap: 8px; align-items: center; }
.main-nav a {
  font-size: 0.85rem; font-weight: 600; color: var(--text-2);
  position: relative; padding: 8px 14px; border-radius: var(--radius-sm);
  transition: all var(--transition);
  border: 1px solid transparent;
}
.main-nav a:hover {
  color: var(--text);
  background: var(--surface-2);
  border-color: var(--border);
}
.main-nav a.active {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: var(--primary);
}

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

.theme-toggle {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); font-size: 1.1rem;
  border: 1px solid var(--border);
  transition: transform 0.3s ease, background var(--transition);
}
.theme-toggle:hover { transform: rotate(20deg) scale(1.05); background: var(--surface-3); }

.mobile-menu-btn {
  display: none; font-size: 1.4rem; padding: 8px; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--border);
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.9rem;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative; overflow: hidden;
}
.btn::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.1), transparent);
  transform: translateX(-100%);
  transition: transform 0.4s ease;
}
.btn:hover::before { transform: translateX(100%); }
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border: 1px solid var(--primary);
  box-shadow: 0 0 15px var(--glow-primary), 0 4px 14px rgba(99,102,241,0.3);
}
.btn-primary:hover {
  box-shadow: 0 0 25px var(--glow-primary), 0 6px 20px rgba(99,102,241,0.4);
  border-color: var(--accent);
}
.btn-secondary {
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface-3); border-color: var(--border-light); }
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border: 1px solid var(--accent);
  box-shadow: 0 0 15px var(--glow-accent);
}
.btn-accent:hover { box-shadow: 0 0 25px var(--glow-accent); border-color: var(--primary); }
.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 4px;
  font-weight: 600; font-size: 0.85rem; color: var(--primary);
  transition: gap var(--transition);
}
.link-arrow:hover { gap: 8px; }

/* ── Hero ── */
.hero {
  position: relative; padding: 100px 0 80px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(99,102,241,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 20% 80%, rgba(6,182,212,0.12) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(139,92,246,0.08) 0%, transparent 60%);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236366f1' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}
[data-theme="light"] .hero-bg {
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(99,102,241,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 20% 80%, rgba(6,182,212,0.06) 0%, transparent 55%);
}
.hero-content { position: relative; z-index: 1; max-width: 800px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 100px;
  font-size: 0.8rem; font-weight: 600;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-2); margin-bottom: 20px;
  font-family: var(--font-mono);
}
.hero-badge::before {
  content: '●'; color: var(--success); font-size: 0.6rem;
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(2.6rem, 6vw, 4rem); font-weight: 800;
  line-height: 1.05; letter-spacing: -0.03em; margin-bottom: 20px;
}
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  filter: drop-shadow(0 0 20px var(--glow-primary));
}

.hero-subtitle {
  font-size: 1.15rem; color: var(--text-2); line-height: 1.65;
  margin-bottom: 36px; max-width: 600px;
}

.hero-stats {
  display: flex; gap: 40px; margin-bottom: 36px; flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; }
.stat-value {
  font-size: 1.8rem; font-weight: 800; color: var(--text);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-label { font-size: 0.8rem; color: var(--text-3); font-weight: 500; }

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ── Sections ── */
section { padding: 72px 0; }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2rem); font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 8px;
}
.section-subtitle {
  color: var(--text-2); font-size: 1rem; margin-bottom: 40px;
}

/* ── Getting Started ── */
.getting-started { background: var(--surface-2); }
.steps-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.step-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.step-number {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  margin-bottom: 16px;
}
.step-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 0.88rem; color: var(--text-2); margin-bottom: 14px; line-height: 1.6; }

/* ── Filters ── */
.section-header {
  display: flex; justify-content: space-between; align-items: flex-end;
  flex-wrap: wrap; gap: 16px; margin-bottom: 28px;
}
.newsletter-inline {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.85rem; color: var(--text-2);
  background: var(--surface-2); padding: 8px 16px; border-radius: var(--radius-sm);
}

.filters {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center;
  margin-bottom: 28px;
}
.search-box { position: relative; flex: 1; min-width: 240px; max-width: 360px; }
.search-box input {
  width: 100%; padding: 10px 14px 10px 40px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.search-box input::placeholder { color: var(--text-3); }
.search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font-size: 0.9rem; opacity: 0.5; pointer-events: none; }

.filter-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-btn {
  padding: 7px 14px; border-radius: 100px; font-size: 0.82rem; font-weight: 500;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-2); transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; border-color: transparent; box-shadow: 0 2px 8px rgba(99,102,241,0.25);
}

.sort-box select {
  padding: 8px 32px 8px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-size: 0.85rem; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234a4f66' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
  cursor: pointer;
}
[data-theme="dark"] .sort-box select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a5b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); }

/* ── Projects Grid ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 0;
  display: flex; flex-direction: column;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.project-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--accent-2));
  opacity: 0; transition: opacity var(--transition);
}
.project-card::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--primary-soft), transparent 50%);
  opacity: 0; transition: opacity var(--transition);
  pointer-events: none;
}
.project-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
  border-color: var(--border-light);
}
.project-card:hover::before { opacity: 1; }
.project-card:hover::after { opacity: 0.5; }

/* Project Card Image/Banner */
.project-banner {
  width: 100%; height: 140px;
  background: linear-gradient(135deg, var(--surface-3), var(--surface-2));
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.project-banner::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 30% 50%, rgba(99,102,241,0.15) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(6,182,212,0.1) 0%, transparent 50%);
}
.project-banner-icon {
  font-size: 3rem; z-index: 1;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
}
.project-banner-glow {
  position: absolute; width: 80px; height: 80px;
  border-radius: 50%;
  filter: blur(40px); opacity: 0.4;
}

.project-card-body { padding: 20px; display: flex; flex-direction: column; gap: 12px; flex: 1; }

.project-header { display: flex; align-items: flex-start; gap: 12px; }
.project-icon {
  width: 44px; height: 44px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; flex-shrink: 0;
  background: var(--surface-2); border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.project-meta { flex: 1; min-width: 0; }
.project-name { font-size: 1.05rem; font-weight: 700; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.project-category {
  display: inline-block; padding: 3px 10px; border-radius: 100px;
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
  background: var(--primary-soft); color: var(--primary);
  border: 1px solid var(--primary);
  font-family: var(--font-mono);
}

.project-desc { font-size: 0.88rem; color: var(--text-2); line-height: 1.55; }

.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  padding: 3px 10px; border-radius: 6px; font-size: 0.72rem; font-weight: 500;
  background: var(--surface-2); color: var(--text-2);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
}
.tag.difficulty-easy { background: rgba(34,197,94,0.12); color: var(--success); border-color: rgba(34,197,94,0.3); }
.tag.difficulty-medium { background: rgba(245,158,11,0.12); color: var(--warning); border-color: rgba(245,158,11,0.3); }
.tag.difficulty-hard { background: rgba(239,68,68,0.12); color: var(--danger); border-color: rgba(239,68,68,0.3); }

/* Tech-style data row */
.project-data-row {
  display: flex; gap: 16px; font-size: 0.78rem; color: var(--text-3);
  font-family: var(--font-mono);
  padding: 8px 0;
  border-top: 1px dashed var(--border);
  border-bottom: 1px dashed var(--border);
}
.project-data-row span { display: flex; align-items: center; gap: 4px; }
.project-data-row .data-value { color: var(--accent); font-weight: 600; }

.project-actions {
  display: flex; gap: 10px; margin-top: auto; padding-top: 8px;
}
.project-actions .btn { flex: 1; padding: 8px 14px; font-size: 0.82rem; }
.btn-outline {
  background: transparent; border: 1px solid var(--border); color: var(--text-2);
}
.btn-outline:hover { background: var(--surface-2); border-color: var(--primary); color: var(--primary); }

.share-btn {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); border: 1px solid var(--border);
  font-size: 1rem; transition: all var(--transition);
}
.share-btn:hover { background: var(--primary-soft); border-color: var(--primary); color: var(--primary); }

.trending-badge {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  padding: 4px 10px; border-radius: 100px; font-size: 0.7rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-orange), var(--danger));
  color: #fff;
  box-shadow: 0 2px 8px rgba(245,158,11,0.3);
  font-family: var(--font-mono);
}

/* New Badge */
.new-badge {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  padding: 4px 10px; border-radius: 100px; font-size: 0.7rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-green), var(--accent));
  color: #fff;
  box-shadow: 0 2px 8px rgba(16,185,129,0.3);
  font-family: var(--font-mono);
  animation: pulse-badge 2s ease infinite;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* ── Guides ── */
.guides { background: var(--surface-2); }
.guides-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.guide-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.guide-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.guide-image {
  height: 160px; background: linear-gradient(135deg, var(--surface-2), var(--border));
  display: flex; align-items: center; justify-content: center; font-size: 3rem;
}
.guide-content { padding: 20px; }
.guide-content h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.guide-content p { font-size: 0.85rem; color: var(--text-2); margin-bottom: 14px; line-height: 1.5; }
.guide-meta { display: flex; gap: 12px; font-size: 0.78rem; color: var(--text-3); }

/* ── Trending / Leaderboard ── */
.trending-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.trending-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px;
  display: flex; align-items: center; gap: 14px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.trending-item:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.trending-rank {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.8rem; flex-shrink: 0;
  background: var(--surface-2); color: var(--text-3);
}
.trending-rank.top3 { background: linear-gradient(135deg, #f59e0b, #ef4444); color: #fff; }
.trending-info { flex: 1; min-width: 0; }
.trending-info .name { font-weight: 700; font-size: 0.95rem; }
.trending-info .change { font-size: 0.8rem; color: var(--success); font-weight: 600; }
.trending-info .change.down { color: var(--danger); }

/* ── News ── */
.news-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.news-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.news-date { font-size: 0.78rem; color: var(--text-3); font-weight: 500; margin-bottom: 8px; }
.news-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.35; }
.news-card p { font-size: 0.87rem; color: var(--text-2); line-height: 1.55; }
.news-tag {
  display: inline-block; margin-top: 12px; padding: 2px 8px; border-radius: 4px;
  font-size: 0.72rem; font-weight: 600; background: var(--primary-soft); color: var(--primary);
}

/* ── Newsletter ── */
.newsletter { padding: 60px 0; }
.newsletter-card {
  background: linear-gradient(135deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 48px; text-align: center;
  position: relative; overflow: hidden;
}
.newsletter-card::before {
  content: ''; position: absolute; top: -50%; left: -20%; width: 140%; height: 140%;
  background: radial-gradient(circle at 50% 50%, rgba(99,102,241,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.newsletter-content { position: relative; z-index: 1; max-width: 520px; margin: 0 auto; }
.newsletter-content h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 10px; }
.newsletter-content p { color: var(--text-2); margin-bottom: 24px; font-size: 0.95rem; }
.newsletter-form {
  display: flex; gap: 10px; flex-wrap: wrap; justify-content: center;
}
.newsletter-form input {
  flex: 1; min-width: 220px; padding: 12px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 0.95rem; transition: border-color var(--transition), box-shadow var(--transition);
}
.newsletter-form input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.newsletter-form input::placeholder { color: var(--text-3); }
.newsletter-form button { padding: 12px 24px; }
.newsletter-note { font-size: 0.78rem; color: var(--text-3); margin-top: 14px; }

/* ── Submit Project ── */
.submit-project { padding: 60px 0; }
.submit-card {
  background: linear-gradient(135deg, var(--primary-soft), rgba(6,182,212,0.06));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 48px; text-align: center;
}
.submit-card h2 { font-size: 1.5rem; font-weight: 800; margin-bottom: 10px; }
.submit-card p { color: var(--text-2); margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 28px; background: var(--surface);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px; margin-bottom: 40px;
}
.footer-brand p { font-size: 0.88rem; color: var(--text-2); margin: 14px 0 18px; max-width: 280px; }
.social-links { display: flex; gap: 12px; }
.social-links a {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); border: 1px solid var(--border);
  font-size: 1.1rem; transition: all var(--transition);
}
.social-links a:hover { background: var(--primary-soft); border-color: var(--primary); transform: translateY(-2px); }

.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h4 { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-3); margin-bottom: 4px; }
.footer-links a { font-size: 0.88rem; color: var(--text-2); transition: color var(--transition); }
.footer-links a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 20px;
  text-align: center; font-size: 0.8rem; color: var(--text-3);
}

/* ── Modal ── */
.modal {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.25s ease;
}
.modal.active { opacity: 1; pointer-events: auto; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.5); backdrop-filter: blur(4px); }
.modal-content {
  position: relative; z-index: 1;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); max-width: 640px; width: 90%;
  max-height: 85vh; overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(12px); transition: transform 0.25s ease;
}
.modal.active .modal-content { transform: translateY(0); }
.modal-close {
  position: absolute; top: 14px; right: 14px; width: 34px; height: 34px;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); font-size: 1.4rem; line-height: 1;
  transition: background var(--transition);
}
.modal-close:hover { background: var(--border); }

.modal-body { padding: 32px; }
.modal-body .project-header { margin-bottom: 20px; }
.modal-body .project-icon { width: 56px; height: 56px; font-size: 1.8rem; }
.modal-body h2 { font-size: 1.3rem; font-weight: 800; margin-bottom: 6px; }
.modal-body .project-category { margin-bottom: 16px; }
.modal-body p { font-size: 0.92rem; color: var(--text-2); line-height: 1.65; margin-bottom: 16px; }
.guide-steps { margin: 20px 0; padding-left: 0; list-style: none; }
.guide-steps li {
  padding: 12px 0 12px 36px; border-bottom: 1px solid var(--border);
  position: relative; font-size: 0.9rem; color: var(--text-2);
}
.guide-steps li::before {
  content: attr(data-step); position: absolute; left: 0; top: 12px;
  width: 24px; height: 24px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.guide-steps li:last-child { border-bottom: none; }

.earnings-box {
  background: var(--surface-2); border-radius: var(--radius-sm);
  padding: 16px; margin: 16px 0;
}
.earnings-box h4 { font-size: 0.85rem; font-weight: 700; margin-bottom: 8px; }
.earnings-box p { font-size: 0.85rem; margin-bottom: 4px; }

/* ── Bounty Tracker Section ── */
.bounty-guide { padding: 80px 0; background: var(--surface); }
.guide-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; }
.tracker-platforms { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; margin: 32px 0; }
.tracker-category { background: var(--surface-2); border-radius: var(--radius); padding: 24px; }
.tracker-category h3 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; color: var(--primary); }
.platform-list { display: flex; flex-direction: column; gap: 10px; }
.platform-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.platform-link:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.platform-icon { font-size: 1.5rem; width: 40px; text-align: center; }
.platform-info { display: flex; flex-direction: column; }
.platform-info strong { font-size: 0.9rem; font-weight: 600; color: var(--text); }
.platform-info span { font-size: 0.8rem; color: var(--text-3); margin-top: 2px; }

.tracker-workflow { margin: 40px 0; padding: 28px; background: var(--surface-2); border-radius: var(--radius); }
.tracker-workflow h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 20px; color: var(--text); }
.workflow-steps { display: flex; flex-direction: column; gap: 16px; }
.workflow-step { display: flex; align-items: flex-start; gap: 16px; }
.step-num {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  flex-shrink: 0;
}
.step-content strong { font-size: 0.95rem; font-weight: 600; color: var(--text); }
.step-content p { font-size: 0.85rem; color: var(--text-2); margin-top: 4px; line-height: 1.5; }

.bounty-tips { margin-top: 32px; padding: 24px; background: var(--surface-2); border-radius: var(--radius); border-left: 4px solid var(--accent); }
.bounty-tips h3 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; color: var(--text); }
.tip-list { list-style: none; padding: 0; }
.tip-list li { padding: 8px 0; font-size: 0.88rem; color: var(--text-2); line-height: 1.6; }
.tip-list li strong { color: var(--text); }

/* ── Load More ── */
.load-more { text-align: center; margin-top: 32px; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 24px; }
}

@media (max-width: 600px) {
  :root { --header-h: 56px; }
  .hero { padding: 60px 0 50px; }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  section { padding: 48px 0; }
  .projects-grid, .guides-grid, .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .newsletter-card, .submit-card { padding: 28px; }
  .newsletter-form { flex-direction: column; }
  .newsletter-form input { width: 100%; }
  .project-actions { flex-direction: column; }
  .filters { flex-direction: column; align-items: stretch; }
  .search-box { max-width: 100%; }
  .sort-box { width: 100%; }
  .sort-box select { width: 100%; }
}

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.project-card, .guide-card, .news-card, .step-card, .trending-item {
  animation: fadeUp 0.4s ease both;
}