/* =========================
   THEME TOKENS
   ========================= */
   :root{
    --blue-900:#0F2345; /* Deep Logic Blue */
    --slate-500:#647286; /* Technical Slate */
    --cyan-500:#00C2D8; /* Catalyst Cyan */
    --offwhite:#F8F9FB; /* Off-White */
  
    --text: var(--blue-900);
    --text-muted: var(--slate-500);
  
    --card: #ffffff;
    --border: rgba(15, 35, 69, 0.10);
    --shadow: 0 18px 40px rgba(15, 35, 69, 0.12);
    --shadow-soft: 0 10px 24px rgba(15, 35, 69, 0.10);
  
    --radius-lg: 22px;
    --radius-md: 14px;
    --radius-sm: 12px;
  
    --ring: 0 0 0 4px rgba(0, 194, 216, 0.20);
  }
  
  /* =========================
     BASE RESET
     ========================= */
  *{ margin:0; padding:0; box-sizing:border-box; }
  
  html{ scroll-behavior:smooth; }
  
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height:1.6;
    color: var(--text);
    min-height:100vh;
    background:
      radial-gradient(900px 500px at 20% 10%, rgba(0,194,216,0.16), transparent 60%),
      radial-gradient(900px 500px at 80% 0%, rgba(15,35,69,0.14), transparent 55%),
      linear-gradient(180deg, #ffffff 0%, var(--offwhite) 55%, #ffffff 100%);
  }
  
  /* Subtle “technical grid” overlay */
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    background-image:
      linear-gradient(to right, rgba(15,35,69,0.05) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(15,35,69,0.05) 1px, transparent 1px);
    background-size: 44px 44px;
    opacity:0.25;
    mask-image: radial-gradient(circle at 50% 20%, rgba(0,0,0,0.75), transparent 70%);
  }
  
  .container{
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
    position:relative;
  }
  
  /* Focus visibility */
  a:focus-visible, button:focus-visible{
    outline:none;
    box-shadow: var(--ring);
    border-radius: 10px;
  }
  
  /* =========================
     HEADER (GLASS + CLEAN)
     ========================= */
  .header{
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(248,249,251,0.72);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
  }
  
  .nav{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap: 18px;
  }
  
  .logo{
    display:flex;
    align-items:center;
    text-decoration:none;
    color: var(--cyan-500);
  }
  
  .nav-links{
    display:flex;
    gap: 22px;
    align-items:center;
  }
  
  .nav-links a{
    color: var(--text-muted);
    text-decoration:none;
    font-weight:600;
    font-size: 14px;
    letter-spacing: 0.2px;
    padding: 8px 10px;
    border-radius: 10px;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
  }
  
  .nav-links a:hover{
    color: var(--text);
    background: rgba(0,194,216,0.10);
  }
  
  .nav-links a.active{
    color: var(--text);
    background: rgba(0,194,216,0.14);
  }
  
  /* =========================
     BUTTONS
     ========================= */
  .btn{
    padding: 10px 18px;
    border-radius: 999px;
    font-weight:700;
    font-size: 14px;
    text-decoration:none;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap: 10px;
    user-select:none;
  }
  
  .btn-primary{
    background: linear-gradient(180deg, var(--cyan-500) 0%, #00A8BC 100%);
    color: #ffffff;
    border: 1px solid rgba(0,194,216,0.55);
    box-shadow: 0 12px 26px rgba(0,194,216,0.22);
  }
  
  .btn-primary:hover{
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(0,194,216,0.28);
  }
  
  .btn-outline{
    background: rgba(255,255,255,0.75);
    color: var(--cyan-500);
    border: 1px solid rgba(0,194,216,0.55);
  }
  
  .btn-outline:hover{
    transform: translateY(-2px);
    background: rgba(0,194,216,0.10);
  }
  
  /* =========================
     HERO (MORE PRODUCT-LIKE)
     ========================= */
  .hero{
    padding: 92px 0 90px;
    text-align:center;
    color: var(--text);
  }
  
  .hero h1{
    font-size: 50px;
    line-height: 1.08;
    margin-bottom: 18px;
    font-weight: 800;
    letter-spacing: -0.6px;
  }
  
  .hero p{
    font-size: 18px;
    margin: 0 auto 34px;
    max-width: 860px;
    color: rgba(100,114,134,0.95);
  }
  
  .cta-buttons{
    display:flex;
    gap: 14px;
    justify-content:center;
    flex-wrap: wrap;
    margin-top: 22px;
  }
  
  /* CTA section variant */
  .cta-section{
    background:
      radial-gradient(700px 360px at 50% 0%, rgba(0,194,216,0.18), transparent 65%),
      linear-gradient(180deg, rgba(15,35,69,0.03), rgba(15,35,69,0.00));
  }
  
  /* =========================
     SECTIONS
     ========================= */
  .features{
    padding: 86px 0;
    background: transparent;
  }
  
  .section-title{
    text-align:center;
    margin-bottom: 42px;
  }
  
  .section-title h2{
    font-size: 34px;
    color: var(--text);
    margin-bottom: 12px;
    font-weight: 800;
    letter-spacing: -0.4px;
  }
  
  .section-title p{
    color: var(--text-muted);
    max-width: 760px;
    margin: 0 auto;
    font-size: 16px;
  }
  
  /* =========================
     CARDS (MODERN, LESS “CLICHE”)
     ========================= */
  .features-grid{
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
    margin-top: 34px;
  }
  
  .feature-card{
    background: rgba(255,255,255,0.82);
    border: 1px solid var(--border);
    padding: 26px 22px;
    border-radius: var(--radius-lg);
    text-align: left;
    box-shadow: var(--shadow-soft);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
    position: relative;
    overflow: hidden;
  }
  
  /* subtle top accent line */
  .feature-card::before{
    content:"";
    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:3px;
    background: linear-gradient(90deg, rgba(0,194,216,0.0), rgba(0,194,216,0.9), rgba(0,194,216,0.0));
    opacity:0.85;
  }
  
  .feature-card:hover{
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: rgba(0,194,216,0.25);
  }
  
  .feature-icon{
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display:flex;
    align-items:center;
    justify-content:center;
    background: rgba(0,194,216,0.10);
    color: var(--cyan-500);
    font-size: 22px;
    margin-bottom: 14px;
  }
  
  .feature-card h3{
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text);
    font-weight: 800;
  }
  
  .feature-card p{
    color: var(--text-muted);
    line-height: 1.6;
    font-size: 14.5px;
  }
  
  /* =========================
     HOW IT WORKS (UPGRADED)
     ========================= */
  .how-it-works{
    padding: 84px 0;
    background: transparent;
  }
  
  .steps{
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-top: 28px;
  }
  
  .step{
    background: rgba(255,255,255,0.82);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    box-shadow: var(--shadow-soft);
    text-align:left;
  }
  
  .step-number{
    width: 44px;
    height: 44px;
    background: rgba(0,194,216,0.12);
    color: var(--cyan-500);
    border: 1px solid rgba(0,194,216,0.25);
    border-radius: 14px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size: 16px;
    font-weight: 900;
    margin: 0 0 14px 0;
  }
  
  .step h3{
    font-size: 16.5px;
    margin-bottom: 8px;
    color: var(--text);
    font-weight: 800;
  }
  
  .step p{
    color: var(--text-muted);
    font-size: 14.5px;
  }
  
  /* =========================
     MESSAGES
     ========================= */
  .messages{
    max-width: 860px;
    margin: 18px auto 0;
    padding: 0 20px;
  }
  
  .message{
    padding: 12px 14px;
    border-radius: 14px;
    margin: 10px 0;
    text-align: left;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.85);
  }
  
  .success{
    border-color: rgba(0,194,216,0.35);
  }
  
  .error{
    border-color: rgba(220,53,69,0.35);
  }
  
  /* =========================
     FOOTER (MATCH THEME)
     ========================= */
  .app-footer{
    padding: 34px 0 30px;
    text-align:center;
    border-top: 1px solid var(--border);
    background: rgba(248,249,251,0.75);
    backdrop-filter: blur(10px);
  }
  
  .app-footer p{
    margin: 0 0 14px 0;
    color: var(--text-muted);
  }
  
  .app-footer p strong{
    color: var(--text);
  }
  
  .app-footer .footer-links{
    display:flex;
    justify-content:center;
    align-items:center;
    flex-wrap:wrap;
    gap: 10px 12px;
    margin: 0 auto;
    padding: 0;
  }
  
  .app-footer .footer-links a{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap: 8px;
    padding: 9px 12px;
    text-decoration:none;
    border-radius: 999px;
    color: var(--text-muted);
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.75);
    transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
  }
  
  .app-footer .footer-links a:hover{
    transform: translateY(-2px);
    color: var(--text);
    background: rgba(0,194,216,0.10);
    border-color: rgba(0,194,216,0.25);
  }
  
  /* =========================
     RESPONSIVE
     ========================= */
  @media (max-width: 900px){
    .hero h1{ font-size: 40px; }
    .hero p{ font-size: 17px; }
    .nav-links{ gap: 14px; }
  }
  
  @media (max-width: 768px){
    .hero{ padding: 72px 0 70px; }
    .hero h1{ font-size: 34px; }
    .nav-links{ display:none; }
  }
  
  @media (max-width: 520px){
    .btn{ width: 100%; max-width: 360px; }
    .cta-buttons{ gap: 10px; }
  }