:root {
    --bg: #0a0c12;
    --surface: #12151f;
    --surface2: #1a1e2e;
    --border: #252a3a;
    --accent: #39ff6a;
    --accent2: #00c844;
    --green: #39ff6a;
    --blue: #39ff6a;
    --muted: #4a5168;
    --text: #e8ecf5;
    --text2: #b0b7c9;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'DM Sans', sans-serif;
    font-weight: 300;
    overflow-x: hidden;
  }

  /* ── Grain ── */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.35;
  }

  /* ── Blobs ── */
  .blob { position: fixed; border-radius: 50%; filter: blur(130px); opacity: 0.06; pointer-events: none; z-index: 0; }
  .blob-1 { width: 700px; height: 700px; background: var(--accent); top: -300px; left: -250px; }
  .blob-2 { width: 600px; height: 600px; background: #39ff6a;   bottom: 0;   right: -200px; }
  .blob-3 { width: 400px; height: 400px; background: var(--accent2); top: 60vh;  left: 30%; }

  /* ── Nav ── */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 18px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(10,12,18,0.7);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.04);
  }

  .nav-brand {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 22px;
    letter-spacing: 0.08em;
    color: var(--text);
  }

  .nav-brand span { color: var(--accent); }

  .nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
  }

  .nav-links a {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text2);
    text-decoration: none;
    transition: color 0.2s;
  }

  .nav-links a:hover { color: var(--accent); }

  .nav-cta {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--accent);
    border: none;
    padding: 9px 20px;
    border-radius: 6px;
    cursor: pointer;
    transition: opacity 0.2s;
  }

  .nav-cta:hover { opacity: 0.85; }

  /* ── Sections ── */
  section { position: relative; z-index: 1; }

  .container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 40px;
  }

  /* ── Hero ── */
  #hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
  }

  .hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    width: 100%;
    padding: 80px 0;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(57,255,106,0.08);
    border: 1px solid rgba(57,255,106,0.2);
    padding: 5px 12px;
    border-radius: 4px;
    margin-bottom: 24px;
  }

  .hero-tag::before {
    content: '';
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%,100% { opacity:1; transform:scale(1); }
    50%      { opacity:0.4; transform:scale(0.7); }
  }

  .hero-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(56px, 7vw, 96px);
    line-height: 0.9;
    letter-spacing: 0.02em;
    margin-bottom: 28px;
  }

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

  .hero-desc {
    font-size: 17px;
    color: var(--text2);
    line-height: 1.65;
    max-width: 420px;
    margin-bottom: 36px;
  }

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

  .btn-primary {
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--accent);
    border: none;
    padding: 13px 24px;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.15s;
    text-decoration: none;
    display: inline-block;
  }

  .btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

  .btn-outline {
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    background: transparent;
    border: 1px solid var(--accent);
    padding: 13px 24px;
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.15s;
    text-decoration: none;
    display: inline-block;
  }

  .btn-outline:hover { background: rgba(57,255,106,0.08); transform: translateY(-1px); }

  /* Video box */
  .video-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }

  .video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
    padding: 32px;
  }

  .play-btn {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: rgba(57,255,106,0.12);
    border: 2px solid rgba(57,255,106,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: glow 3s infinite;
  }

  @keyframes glow {
    0%,100% { box-shadow: 0 0 0 0 rgba(57,255,106,0); }
    50%      { box-shadow: 0 0 32px 8px rgba(57,255,106,0.12); }
  }

  .video-label {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
  }

  .video-sublabel {
    font-size: 13px;
    color: var(--muted);
  }

  /* ── How it works ── */
  #how {
    padding: 100px 0;
  }

  .section-eyebrow {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 14px;
  }

  .section-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(36px, 5vw, 56px);
    letter-spacing: 0.02em;
    line-height: 1;
    margin-bottom: 56px;
  }

  .steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .step {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 24px;
    position: relative;
    transition: border-color 0.2s, transform 0.2s;
  }

  .step:hover { border-color: rgba(57,255,106,0.25); transform: translateY(-4px); }

  .step-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 64px;
    line-height: 1;
    color: rgba(57,255,106,0.12);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
  }

  .step-icon {
    font-size: 28px;
    margin-bottom: 14px;
  }

  .step-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
  }

  .step-desc {
    font-size: 13px;
    color: var(--text2);
    line-height: 1.6;
  }

  .step-connector {
    position: absolute;
    top: 50%;
    right: -20px;
    transform: translateY(-50%);
    color: var(--muted);
    font-size: 18px;
    z-index: 2;
  }

  /* ── Elevator pitch ── */
  #pitch {
    padding: 80px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }

  .pitch-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 48px;
    align-items: start;
  }

  .pitch-tabs {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .pitch-tab {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 10px 14px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text2);
    border: 1px solid transparent;
    text-align: left;
    background: transparent;
    transition: all 0.15s;
  }

  .pitch-tab:hover { color: var(--text); background: var(--surface); }

  .pitch-tab.active {
    color: var(--accent);
    background: var(--surface);
    border-color: var(--border);
  }

  .pitch-panels { position: relative; }

  .pitch-panel { display: none; }
  .pitch-panel.active { display: block; }

  .pitch-quote {
    font-size: clamp(18px, 2.5vw, 24px);
    line-height: 1.55;
    color: var(--text);
    font-weight: 300;
    border-left: 3px solid var(--accent);
    padding-left: 28px;
    margin-bottom: 20px;
  }

  .pitch-note {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--muted);
    padding-left: 28px;
  }

  /* ── Stats strip ── */
  .stats-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    margin: 60px 0;
  }

  .stat {
    background: var(--surface);
    padding: 28px 24px;
    text-align: center;
  }

  .stat-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 40px;
    letter-spacing: 0.02em;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 6px;
  }

  .stat-label {
    font-size: 12px;
    color: var(--text2);
    line-height: 1.4;
  }

  /* ── Checklist ── */
  #progress {
    padding: 100px 0;
  }

  .progress-strip {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
  }

  .progress-info { flex: 1; }

  .progress-label {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text2);
    margin-bottom: 8px;
  }

  .progress-bar-outer { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }

  .progress-bar-inner {
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--green), var(--accent));
    transition: width 1.2s cubic-bezier(0.16,1,0.3,1);
  }

  .progress-count {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 36px;
    letter-spacing: 0.02em;
    color: var(--accent);
    white-space: nowrap;
  }

  .progress-count span { font-size: 16px; color: var(--muted); }

  .checklist-section { margin-bottom: 36px; }

  .checklist-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
  }

  .checklist-label {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text2);
    white-space: nowrap;
  }

  .checklist-line { flex: 1; height: 1px; background: var(--border); }

  /* Cards */
  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 8px;
    display: grid;
    grid-template-columns: 38px 1fr auto;
    align-items: start;
    gap: 14px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
    position: relative;
    overflow: hidden;
    animation: slideUp 0.5s cubic-bezier(0.16,1,0.3,1) both;
  }

  @keyframes slideUp {
    from { opacity:0; transform:translateY(14px); }
    to   { opacity:1; transform:translateY(0); }
  }

  .card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--border);
    transition: background 0.2s;
  }

  .card:hover { border-color: rgba(57,255,106,0.25); background: var(--surface2); transform: translateX(2px); }
  .card:hover::before { background: var(--accent); }
  .card.done::before { background: var(--green); }
  .card.done .card-title { color: var(--text2); }
  .card.in-progress::before { background: var(--accent); animation: prog-pulse 2s infinite; }
  .card.gated::before { background: #39ff6a; }

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

  .checkbox {
    width: 22px; height: 22px;
    border-radius: 6px;
    border: 2px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
    transition: all 0.2s;
  }

  .card.done .checkbox       { background: var(--green);  border-color: var(--green); }
  .card.in-progress .checkbox{ border-color: var(--accent); }
  .card.gated .checkbox      { background: #39ff6a; border-color: #39ff6a; }

  .check-icon    { display:none; }
  .card.done .check-icon { display:block; }

  .progress-ring { display:none; }
  .card.in-progress .progress-ring { display:block; }

  .lock-icon { display:none; }
  .card.gated .lock-icon { display:block; }

  .card-body { min-width: 0; }

  .card-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 4px;
    line-height: 1.3;
  }

  .card-desc { font-size: 12px; color: var(--text2); line-height: 1.55; }

  .card-tags {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
    flex-shrink: 0;
  }

  .tag {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    white-space: nowrap;
  }

  .tag-done     { background:rgba(61,255,160,0.1);  color:var(--green);   border:1px solid rgba(61,255,160,0.2); }
  .tag-wip      { background:rgba(245,197,66,0.1);  color:var(--accent);  border:1px solid rgba(57,255,106,0.25); }
  .tag-todo     { background:rgba(139,146,168,0.1); color:var(--text2);   border:1px solid var(--border); }
  .tag-critical { background:rgba(0,200,68,0.1);  color:var(--accent2); border:1px solid rgba(0,200,68,0.2); }
  .tag-asset    { background:rgba(57,255,106,0.1);  color:#39ff6a;    border:1px solid rgba(57,255,106,0.1); }
  .tag-gated    { background:rgba(57,255,106,0.1);  color:#39ff6a;    border:1px solid rgba(57,255,106,0.1); }

  .card-details {
    grid-column: 2 / -1;
    display: none;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
  }

  .card.expanded .card-details { display: block; }

  .card-detail-list { list-style: none; display: flex; flex-direction: column; gap: 5px; }

  .card-detail-list li {
    font-size: 12px;
    color: var(--text2);
    padding-left: 14px;
    position: relative;
    line-height: 1.5;
  }

  .card-detail-list li::before        { content:'→'; position:absolute; left:0; color:var(--muted); font-size:11px; }
  .card-detail-list li.done-item      { color:var(--green); opacity:0.75; }
  .card-detail-list li.done-item::before { content:'✓'; color:var(--green); }

  .expand-btn {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--muted);
    text-transform: uppercase;
    cursor: pointer;
    margin-top: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s;
    user-select: none;
  }

  .expand-btn:hover { color: var(--accent); }
  .expand-arrow { transition: transform 0.2s; display: inline-block; }
  .card.expanded .expand-arrow { transform: rotate(180deg); }

  .request-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #39ff6a;
    background: rgba(57,255,106,0.1);
    border: 1px solid rgba(57,255,106,0.1);
    padding: 5px 12px;
    border-radius: 4px;
    margin-top: 10px;
    cursor: pointer;
    transition: background 0.2s;
  }

  .request-btn:hover { background: rgba(57,255,106,0.1); }

  /* ── Modal ── */
  .modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10,12,18,0.88);
    backdrop-filter: blur(14px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
  }

  .modal-overlay.open { display: flex; }

  .modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
  }

  .modal-header {
    padding: 22px 26px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
  }

  .modal-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 28px;
    letter-spacing: 0.04em;
    color: var(--text);
    line-height: 1;
    margin-bottom: 4px;
  }

  .modal-subtitle {
    font-size: 13px;
    color: var(--text2);
    line-height: 1.5;
  }

  .modal-close {
    width: 30px; height: 30px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text2);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    transition: all 0.15s;
  }

  .modal-close:hover { background: var(--surface2); color: var(--text); }

  .modal-body { padding: 22px 26px 26px; }

  .form-row { margin-bottom: 16px; }
  .form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }

  label {
    display: block;
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text2);
    margin-bottom: 6px;
  }

  input, select, textarea {
    width: 100%;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    font-family: 'DM Sans', sans-serif;
    font-size: 14px;
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
    appearance: none;
    -webkit-appearance: none;
  }

  input:focus, select:focus, textarea:focus { border-color: var(--accent); }
  input::placeholder, textarea::placeholder { color: var(--muted); }

  select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234a5168' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px; }

  select option { background: var(--surface2); color: var(--text); }

  textarea { resize: vertical; min-height: 80px; line-height: 1.5; }

  .checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
  }

  .checkbox-row input[type="checkbox"] {
    width: 18px; height: 18px;
    flex-shrink: 0;
    padding: 0;
    margin: 0;
    cursor: pointer;
    appearance: checkbox;
    -webkit-appearance: checkbox;
    accent-color: var(--accent);
    background: transparent;
    border: none;
    border-radius: 0;
    outline: none;
    transition: none;
  }

  .checkbox-row label {
    font-family: 'DM Sans', sans-serif;
    font-size: 13px;
    letter-spacing: 0;
    text-transform: none;
    color: var(--text2);
    margin: 0;
    cursor: pointer;
  }

  .btn-submit {
    width: 100%;
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--accent);
    border: none;
    padding: 14px;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.15s;
    margin-top: 4px;
  }

  .btn-submit:hover { opacity: 0.88; transform: translateY(-1px); }
  .btn-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

  .form-success {
    display: none;
    text-align: center;
    padding: 32px 0 12px;
  }

  .form-success.show { display: block; }

  .success-icon {
    width: 56px; height: 56px;
    background: rgba(61,255,160,0.1);
    border: 2px solid rgba(61,255,160,0.3);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 16px;
    font-size: 22px;
  }

  .success-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 28px;
    letter-spacing: 0.04em;
    color: var(--green);
    margin-bottom: 8px;
  }

  .success-desc { font-size: 14px; color: var(--text2); line-height: 1.5; }

  /* ── Patent strip ── */
  .patent-strip {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 32px;
    margin: 60px 0;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 32px;
    align-items: center;
  }

  .patent-badge {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(57,255,106,0.08);
    border: 1px solid rgba(57,255,106,0.2);
    padding: 8px 14px;
    border-radius: 6px;
    white-space: nowrap;
    text-align: center;
    line-height: 1.8;
  }

  .patent-text h3 {
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 6px;
  }

  .patent-text p { font-size: 13px; color: var(--text2); line-height: 1.6; }

  /* ── Footer ── */
  footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    padding: 36px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .footer-brand {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 20px;
    letter-spacing: 0.08em;
    color: var(--muted);
  }

  .footer-brand span { color: var(--accent); opacity: 0.6; }

  .footer-note {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.08em;
    color: var(--muted);
  }


  /* ══════════════════════════════════════════
     RESPONSIVE — TABLET (max 900px)
  ══════════════════════════════════════════ */
  @media (max-width: 900px) {
    .hero-inner { grid-template-columns: 1fr; gap: 40px; padding: 60px 0 40px; }
    .pitch-grid { grid-template-columns: 1fr; }
    .founders-grid { grid-template-columns: 1fr; }
    .arch-grid { grid-template-columns: 1fr; }
    .problem-grid { grid-template-columns: 1fr !important; }
  }

  /* ══════════════════════════════════════════
     RESPONSIVE — MOBILE (max 768px)
  ══════════════════════════════════════════ */
  @media (max-width: 768px) {

    /* ── Nav ── */
    nav { padding: 14px 16px; }
    .nav-links { display: none; }
    .nav-cta { padding: 8px 16px; font-size: 11px; }

    /* ── Container ── */
    .container { padding: 0 16px; }

    /* ── Hero ── */
    .hero-inner { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 32px; }
    .hero-video-col { order: -1; } /* video first on mobile */
    .hero-title { font-size: clamp(42px, 12vw, 64px); }
    .hero-desc { font-size: 15px; max-width: 100%; }
    .hero-actions { flex-direction: column; align-items: flex-start; gap: 12px; }
    .hero-actions .btn-primary,
    .hero-actions .btn-outline { width: 100%; text-align: center; justify-content: center; }

    /* ── Section titles ── */
    .section-title { font-size: clamp(28px, 9vw, 42px); margin-bottom: 32px; }

    /* ── Stats strip ── */
    .stats-strip { grid-template-columns: 1fr 1fr; gap: 10px; }
    .stat-num { font-size: 28px; }

    /* ── Steps ── */
    .steps { grid-template-columns: 1fr; gap: 14px; }
    .step-connector { display: none; }
    .step-num { font-size: 48px; }

    /* ── Problem grid ── */
    .problem-grid { grid-template-columns: 1fr !important; gap: 14px; }

    /* ── Arch grid ── */
    .arch-grid { grid-template-columns: 1fr; gap: 14px; }

    /* ── Pitch tabs ── */
    .pitch-tabs { flex-direction: row; overflow-x: auto; -webkit-overflow-scrolling: touch; gap: 8px; padding-bottom: 4px; }
    .pitch-tab { flex-shrink: 0; font-size: 10px; padding: 7px 12px; }
    .pitch-grid { grid-template-columns: 1fr; }

    /* ── Founders ── */
    .founders-grid { grid-template-columns: 1fr; gap: 20px; }
    .founder-photo { width: 100px; height: 100px; }

    /* ── Built section ── */
    .built-numbered { gap: 0; }

    /* ── Connect / CTA ── */
    .connect-actions { flex-direction: column; align-items: stretch; }
    .connect-actions .btn-primary,
    .connect-actions .btn-outline { width: 100%; text-align: center; justify-content: center; }

    /* ── Form ── */
    .form-row-2 { grid-template-columns: 1fr; }
    .modal-inner { padding: 24px 16px; margin: 12px; border-radius: 14px; }

    /* ── Footer ── */
    footer { flex-direction: column; gap: 10px; text-align: center; padding: 20px 16px; }
    .footer-note { font-size: 11px; }

    /* ── Inline grid overrides (investor section, social proof etc.) ── */
    #social .container > div[style*="grid-template-columns: 1fr 1fr"],
    #social .container > div[style*="grid-template-columns:1fr 1fr"],
    #founders > .container > div[style*="grid-template-columns: 1fr 1fr"],
    #founders > .container > div[style*="grid-template-columns:1fr 1fr"] {
      grid-template-columns: 1fr !important;
    }

    /* ── Bar sim modal ── */
    .sim-modal-inner { padding: 16px !important; }
    #sim-metrics { grid-template-columns: 1fr 1fr !important; gap: 8px !important; }
    .sim-floor-wrap { grid-template-columns: 1fr !important; }
    #simModal .modal-header { flex-wrap: wrap; gap: 10px; }
    #simModal .modal-body { padding: 14px 12px 16px !important; }

    /* ── How It Works modal ── */
    #howItWorksModal .modal-body { padding: 14px 12px 20px !important; }
    #howItWorksModal .modal { max-height: 92vh !important; }
    .hiw-node { min-width: 160px; }
    .hiw-detail-grid { grid-template-columns: 1fr !important; }
    .hiw-schema-grid { grid-template-columns: 1fr 1fr !important; }

    /* ── Patron phone ── */
    .patron-phone-wrap { transform: scale(0.82); transform-origin: top center; margin-bottom: -60px; }
  }

  /* ══════════════════════════════════════════
     RESPONSIVE — SMALL MOBILE (max 420px)
  ══════════════════════════════════════════ */
  @media (max-width: 420px) {
    .hero-title { font-size: clamp(36px, 11vw, 52px); }
    .stats-strip { grid-template-columns: 1fr 1fr; }
    .stat-num { font-size: 24px; }
    .section-title { font-size: clamp(26px, 10vw, 38px); }
    .nav-cta { display: none; } /* hide CTA in nav on very small screens — hero CTA still visible */
  }

  /* ══════════════════════════════════════════
     MODALS — MOBILE
  ══════════════════════════════════════════ */
  @media (max-width: 768px) {
    /* Full-screen modals on mobile */
    .modal-overlay { padding: 0 !important; align-items: flex-end !important; }
    .modal { border-radius: 20px 20px 0 0 !important; max-height: 92vh !important; width: 100% !important; margin: 0 !important; }
    .sim-modal-inner { border-radius: 20px 20px 0 0 !important; }

    /* HIW flow nodes: 2-column grid instead of horizontal scroll */
    #hiw-flow-row {
      display: grid !important;
      grid-template-columns: 1fr 1fr !important;
      overflow-x: visible !important;
      gap: 8px !important;
      align-items: start !important;
    }
    #hiw-flow-row .hiw-arrow { display: none !important; }
    #hiw-flow-row .hiw-node { min-width: unset !important; }

    /* Live request trace: stack vertically on mobile */
    #trace-nodes-row {
      display: grid !important;
      grid-template-columns: 1fr !important;
      gap: 0 !important;
    }
    #trace-nodes-row .hiw-trace-node {
      text-align: left !important;
      padding: 10px 14px !important;
      border-radius: 0 !important;
      border-bottom: none !important;
      min-width: unset !important;
    }
    #trace-nodes-row .hiw-trace-node:first-child { border-radius: 8px 8px 0 0 !important; }
    #trace-nodes-row .hiw-trace-node:last-child { border-radius: 0 0 8px 8px !important; border-bottom: 1px solid var(--border) !important; }
    #trace-nodes-row .hiw-trace-arrow { display: none !important; }
    #trace-nodes-row .hiw-trace-label { display: inline; margin-right: 8px; color: var(--text2); }
    #trace-nodes-row .hiw-trace-val { display: inline; }
    #sim-metrics { grid-template-columns: 1fr 1fr !important; }

    /* HIW detail cards stack */
    .hiw-detail-grid { grid-template-columns: 1fr !important; }
    .hiw-schema-grid { grid-template-columns: 1fr 1fr !important; }
  }
  /* ── Demo Structure Modal nodes ── */
  .ds-node {
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.12s, filter 0.12s;
    border: 1px solid transparent;
  }
  .ds-node:hover { transform: translateY(-1px); filter: brightness(1.12); }
  .ds-node-title { font-size: 12px; font-weight: 600; margin-bottom: 3px; line-height: 1.3; }
  .ds-node-sub { font-size: 11px; line-height: 1.4; font-family: 'DM Mono', monospace; letter-spacing: 0.03em; }

  .ds-node-green { background: rgba(29,158,117,0.12); border-color: rgba(29,158,117,0.35); }
  .ds-node-green .ds-node-title { color: #9FE1CB; }
  .ds-node-green .ds-node-sub { color: #1D9E75; }

  .ds-node-blue { background: rgba(0,200,68,0.12); border-color: rgba(0,200,68,0.12); }
  .ds-node-blue .ds-node-title { color: #6bffaa; }
  .ds-node-blue .ds-node-sub { color: #39ff6a; }
  .ds-node-blue.ds-node-highlight { border-color: rgba(57,255,106,0.4); background: rgba(57,255,106,0.06); }
  .ds-node-blue.ds-node-highlight .ds-node-title { color: #FAC775; }
  .ds-node-blue.ds-node-highlight .ds-node-sub { color: #BA7517; }

  .ds-node-amber { background: rgba(186,117,23,0.12); border-color: rgba(186,117,23,0.35); }
  .ds-node-amber .ds-node-title { color: #FAC775; }
  .ds-node-amber .ds-node-sub { color: #EF9F27; }

  .ds-node-coral { background: rgba(153,60,29,0.12); border-color: rgba(153,60,29,0.35); }
  .ds-node-coral .ds-node-title { color: #F0997B; }
  .ds-node-coral .ds-node-sub { color: #D85A30; }

  .ds-node-gray { background: rgba(95,94,90,0.12); border-color: rgba(95,94,90,0.3); border-style: dashed; }
  .ds-node-gray .ds-node-sub { color: var(--text2); }

  .ds-arrow { color: var(--text2); font-size: 16px; text-align: center; flex-shrink: 0; }
  .ds-flow-arrow { text-align: center; color: rgba(255,255,255,0.25); font-family: 'DM Mono', monospace; font-size: 10px; letter-spacing: 0.1em; margin: 4px 0; padding: 2px 0; }

  .ds-tag { font-size: 11px; padding: 3px 9px; border-radius: 4px; font-family: 'DM Mono', monospace; letter-spacing: 0.05em; }
  .ds-tag-green { background: rgba(29,158,117,0.12); color: #1D9E75; border: 1px solid rgba(29,158,117,0.3); }
  .ds-tag-blue { background: rgba(0,200,68,0.12); color: #39ff6a; border: 1px solid rgba(0,200,68,0.12); }
  .ds-tag-amber { background: rgba(186,117,23,0.12); color: #EF9F27; border: 1px solid rgba(186,117,23,0.3); }
  .ds-tag-gray { background: transparent; color: var(--text2); border: 1px solid var(--border); }

/* ── How It Works Modal ── */
.hiw-node {
  flex: 1;
  min-width: 130px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 12px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}
.hiw-node:hover, .hiw-node.active {
  border-color: var(--accent);
  background: rgba(57,255,106,0.06);
  transform: translateY(-1px);
}
.hiw-arrow {
  display: flex;
  align-items: center;
  padding: 0 4px;
  flex-shrink: 0;
  color: var(--border);
  font-size: 14px;
}
.hiw-tag {
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  background: rgba(57,255,106,0.08);
  color: var(--accent);
  border-radius: 3px;
  padding: 2px 6px;
  letter-spacing: 0.04em;
  opacity: 0.8;
}
.hiw-trace-node {
  flex: 1;
  background: var(--surface);
  border-radius: 8px;
  padding: 10px 8px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.3s;
  min-width: 0;
}
.hiw-trace-node.lit {
  border-color: var(--accent);
  background: rgba(57,255,106,0.07);
}
.hiw-trace-label {
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text2);
  margin-bottom: 4px;
  transition: color 0.3s;
}
.hiw-trace-node.lit .hiw-trace-label { color: var(--accent); }
.hiw-trace-val {
  font-family: 'DM Mono', monospace;
  font-size: 9px;
  color: var(--text);
  white-space: pre-line;
  min-height: 24px;
  opacity: 0;
  transition: opacity 0.3s;
  line-height: 1.5;
}
.hiw-trace-node.lit .hiw-trace-val { opacity: 1; }
.hiw-trace-arrow {
  width: 18px;
  flex-shrink: 0;
  text-align: center;
  color: var(--border);
  font-size: 14px;
  transition: color 0.3s;
}
.hiw-trace-arrow.lit { color: var(--accent); }
.hiw-schema-row {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  padding: 4px 10px;
  font-family: 'DM Mono', monospace;
  font-size: 10px;
  color: var(--text2);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.hiw-schema-row:last-child { border-bottom: none; }
.hiw-type { color: #39ff6a; font-size: 9px; }