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

    :root {
      --navy:   #0b1d3a;
      --blue:   #1a56db;
      --sky:    #3b82f6;
      --light:  #e8f0fe;
      --white:  #ffffff;
      --gray50: #f8fafc;
      --gray100:#f1f5f9;
      --gray400:#94a3b8;
      --gray600:#475569;
      --gray800:#1e293b;
      --gold:   #f59e0b;
      --radius: 12px;
    }

    body {
      font-family: 'Inter', sans-serif;
      color: var(--gray800);
      background: var(--white);
      line-height: 1.6;
    }

    a { text-decoration: none; color: inherit; }

    /* ── NAV ─────────────────────────────── */
    nav {
      position: sticky; top: 0; z-index: 100;
      background: var(--navy);
      display: flex; align-items: center; justify-content: space-between;
      padding: 0 40px;
      height: 64px;
    }
    .nav-logo {
      font-size: 1.25rem; font-weight: 800;
      color: var(--white); letter-spacing: 0.05em;
    }
    .nav-logo span { color: var(--sky); }
    .nav-links { display: flex; gap: 32px; align-items: center; }
    .nav-links a {
      color: #94a3b8; font-size: 0.9rem; font-weight: 500;
      transition: color .2s;
    }
    .nav-links a:hover { color: var(--white); }
    .nav-btn {
      background: var(--blue); color: var(--white) !important;
      padding: 8px 20px; border-radius: 8px;
      font-weight: 600 !important;
      transition: background .2s !important;
    }
    .nav-btn:hover { background: var(--sky) !important; }

    /* ── HERO ─────────────────────────────── */
    .hero {
      background: linear-gradient(135deg, var(--navy) 0%, #1a3a6e 60%, #1e4d9e 100%);
      padding: 100px 40px 80px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      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='%23ffffff' 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");
    }
    .hero-badge {
      display: inline-block;
      background: rgba(59,130,246,0.2);
      color: #93c5fd;
      border: 1px solid rgba(59,130,246,0.3);
      padding: 6px 16px; border-radius: 999px;
      font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em;
      text-transform: uppercase; margin-bottom: 24px;
    }
    .hero h1 {
      font-size: clamp(2.2rem, 5vw, 3.6rem);
      font-weight: 800; color: var(--white);
      line-height: 1.15; margin-bottom: 20px;
    }
    .hero h1 em { color: #60a5fa; font-style: normal; }
    .hero p {
      font-size: 1.15rem; color: #93c5fd;
      max-width: 560px; margin: 0 auto 40px;
    }
    .hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
    .btn-primary {
      background: var(--blue); color: var(--white);
      padding: 14px 32px; border-radius: var(--radius);
      font-weight: 700; font-size: 1rem;
      transition: transform .15s, box-shadow .15s;
      box-shadow: 0 4px 20px rgba(26,86,219,0.4);
    }
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(26,86,219,0.5); }
    .btn-secondary {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.2);
      color: var(--white);
      padding: 14px 32px; border-radius: var(--radius);
      font-weight: 600; font-size: 1rem;
      transition: background .15s;
    }
    .btn-secondary:hover { background: rgba(255,255,255,0.15); }

    .hero-stats {
      display: flex; gap: 48px; justify-content: center;
      margin-top: 60px; flex-wrap: wrap;
    }
    .stat { text-align: center; }
    .stat-num { font-size: 2rem; font-weight: 800; color: var(--white); }
    .stat-label { font-size: 0.8rem; color: #93c5fd; text-transform: uppercase; letter-spacing: 0.08em; }

    /* ── WHAT IS ─────────────────────────────── */
    .what-is {
      background: var(--gray50);
      padding: 80px 40px;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      background: var(--light); color: var(--blue);
      padding: 5px 14px; border-radius: 999px;
      font-size: 0.78rem; font-weight: 700;
      text-transform: uppercase; letter-spacing: 0.08em;
      margin-bottom: 16px;
    }
    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 800; color: var(--navy);
      margin-bottom: 16px;
    }
    .section-sub {
      color: var(--gray600); max-width: 580px;
      margin: 0 auto 48px; font-size: 1.05rem;
    }
    .cards-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px; max-width: 900px; margin: 0 auto;
    }
    .card {
      background: var(--white);
      border-radius: var(--radius);
      padding: 32px 28px;
      box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
      text-align: left;
      transition: transform .2s, box-shadow .2s;
    }
    .card:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(0,0,0,.1); }
    .card-icon {
      width: 48px; height: 48px;
      background: var(--light);
      border-radius: 12px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.4rem; margin-bottom: 16px;
    }
    .card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: var(--navy); }
    .card p  { font-size: 0.9rem; color: var(--gray600); line-height: 1.6; }

    /* ── STUDY CATEGORIES ─────────────────────────────── */
    .study {
      padding: 80px 40px;
      text-align: center;
    }
    .study-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px; max-width: 1000px; margin: 0 auto;
    }
    .study-card {
      background: var(--navy);
      border-radius: var(--radius);
      padding: 36px 24px;
      text-align: center;
      position: relative; overflow: hidden;
      transition: transform .2s;
      cursor: pointer;
    }
    .study-card:hover { transform: translateY(-4px); }
    .study-card::before {
      content: '';
      position: absolute; top: 0; left: 0; right: 0;
      height: 3px;
    }
    .study-card.c1::before { background: #3b82f6; }
    .study-card.c2::before { background: #10b981; }
    .study-card.c3::before { background: #8b5cf6; }
    .study-card.c4::before { background: var(--gold); }
    .study-icon { font-size: 2.2rem; margin-bottom: 16px; }
    .study-card h3 { color: var(--white); font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
    .study-card p  { color: #94a3b8; font-size: 0.85rem; line-height: 1.5; }
    .study-tag {
      display: inline-block; margin-top: 16px;
      background: rgba(255,255,255,0.08);
      color: #93c5fd; font-size: 0.75rem; font-weight: 600;
      padding: 4px 12px; border-radius: 999px;
    }
    .study-tag.free  { color: #6ee7b7; }
    .study-tag.pro   { background: rgba(245,158,11,0.15); color: var(--gold); }

    /* ── HOW IT WORKS ─────────────────────────────── */
    .how {
      background: var(--gray50);
      padding: 80px 40px;
      text-align: center;
    }
    .steps {
      display: flex; gap: 0;
      max-width: 800px; margin: 0 auto;
      position: relative;
    }
    .steps::before {
      content: '';
      position: absolute;
      top: 28px; left: calc(16.66% + 16px); right: calc(16.66% + 16px);
      height: 2px; background: var(--light);
    }
    .step { flex: 1; text-align: center; padding: 0 16px; }
    .step-num {
      width: 56px; height: 56px;
      background: var(--blue); color: var(--white);
      border-radius: 50%;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.2rem; font-weight: 800;
      margin: 0 auto 20px;
      position: relative; z-index: 1;
    }
    .step h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--navy); }
    .step p  { font-size: 0.88rem; color: var(--gray600); }

    /* ── REPORTS PREVIEW ─────────────────────────────── */
    .reports {
      padding: 80px 40px;
      text-align: center;
    }
    .reports-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px; max-width: 1000px; margin: 0 auto 40px;
    }
    .report-card {
      background: var(--white);
      border: 1px solid #e2e8f0;
      border-radius: var(--radius);
      padding: 24px;
      text-align: left;
      transition: border-color .2s, box-shadow .2s;
    }
    .report-card:hover { border-color: var(--sky); box-shadow: 0 4px 20px rgba(59,130,246,.1); }
    .report-meta {
      display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap;
    }
    .badge {
      padding: 3px 10px; border-radius: 999px;
      font-size: 0.75rem; font-weight: 600;
    }
    .badge-blue   { background: var(--light); color: var(--blue); }
    .badge-green  { background: #dcfce7; color: #16a34a; }
    .badge-purple { background: #f3e8ff; color: #7c3aed; }
    .report-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; color: var(--navy); }
    .report-card p  { font-size: 0.85rem; color: var(--gray600); line-height: 1.6; }
    .report-footer {
      display: flex; align-items: center; justify-content: space-between;
      margin-top: 16px; padding-top: 16px;
      border-top: 1px solid var(--gray100);
    }
    .report-date { font-size: 0.78rem; color: var(--gray400); }
    .report-link { font-size: 0.82rem; font-weight: 600; color: var(--blue); }

    /* ── CTA BANNER ─────────────────────────────── */
    .cta-banner {
      background: linear-gradient(135deg, var(--navy), #1a3a6e);
      padding: 80px 40px;
      text-align: center;
    }
    .cta-banner h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; color: var(--white); margin-bottom: 12px; }
    .cta-banner p  { color: #93c5fd; margin-bottom: 32px; font-size: 1.05rem; }
    .cta-banner .btn-primary { margin: 0 8px; }
    .kofi-btn {
      display: inline-block;
      background: #ff5e5b; color: var(--white);
      padding: 14px 28px; border-radius: var(--radius);
      font-weight: 700; font-size: 0.95rem;
      transition: transform .15s, opacity .15s;
      margin: 0 8px;
    }
    .kofi-btn:hover { transform: translateY(-2px); opacity: .9; }

    /* ── FOOTER ─────────────────────────────── */
    footer {
      background: #060e1f;
      padding: 40px;
      text-align: center;
    }
    .footer-logo { font-size: 1.1rem; font-weight: 800; color: var(--white); margin-bottom: 8px; }
    .footer-logo span { color: var(--sky); }
    footer p { font-size: 0.82rem; color: #475569; }
    .footer-links { display: flex; gap: 24px; justify-content: center; margin: 16px 0; flex-wrap: wrap; }
    .footer-links a { font-size: 0.82rem; color: #64748b; transition: color .2s; }
    .footer-links a:hover { color: var(--white); }

    /* ── RESPONSIVE ─────────────────────────────── */
    @media (max-width: 640px) {
      nav { padding: 0 20px; }
      .nav-links { gap: 16px; }
      .hero { padding: 60px 20px 60px; }
      .hero-stats { gap: 28px; }
      .what-is, .study, .how, .reports, .cta-banner { padding: 60px 20px; }
      .steps { flex-direction: column; gap: 32px; }
      .steps::before { display: none; }
      footer { padding: 32px 20px; }
    }