:root {
    --navy: #16307a;
    --navy-deep: #0a0e1f;
    --blue: #2f7ad6;
    --teal: #2de2c2;
    --pink: #e0326b;
    --purple: #7c6ef0;
    --purple-deep: #2e1a6b;
    --gold: #e0a636;
    --ink: #1b2440;
    --muted: #5b6680;
    --line: #e6e9f2;
    --bg: #ffffff;
    --bg-soft: #f4f6fb;
    --student: #2de2c2;
    --teacher: #ffb35c;
    --writer: #b08bff;
    --display: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
    --body: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  }
  * { box-sizing: border-box; }
  html, body { margin: 0; }
  body {
    font-family: var(--body);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
  }

  /* ---------- Light top nav ---------- */
  .lnav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 1px 3px rgba(22, 48, 122, 0.06);
  }
  .lnav-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }
  .lnav-brand {
    text-decoration: none;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
  }
  .lnav-brand .brand-img {
    height: 2.35rem;
    width: auto;
    max-width: min(220px, 52vw);
    object-fit: contain;
    display: block;
  }
  .lnav-actions {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
  .nav-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.38rem 0.85rem;
    border-radius: 999px;
    font-family: var(--display);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--navy);
    background: linear-gradient(135deg, rgba(45, 226, 194, 0.14), rgba(47, 122, 214, 0.1));
    border: 1px solid rgba(45, 226, 194, 0.35);
  }
  .nav-badge i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--teal);
    box-shadow: 0 0 8px var(--teal);
    animation: pulse 2s ease-in-out infinite;
  }
  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.65; transform: scale(0.85); }
  }
  .login-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--display);
    font-weight: 700;
    font-size: 0.92rem;
    text-decoration: none;
    color: var(--navy-deep);
    background: linear-gradient(135deg, var(--teal), var(--blue));
    padding: 0.55rem 1.15rem;
    border-radius: 0.7rem;
    box-shadow: 0 8px 20px -8px rgba(45, 226, 194, 0.55);
    transition: transform .15s ease, box-shadow .2s ease;
  }
  .login-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px -10px rgba(45, 226, 194, 0.65);
  }

  /* ---------- Dark hero shell ---------- */
  .hero-wrap {
    position: relative;
    background:
      radial-gradient(90% 70% at 15% -5%, rgba(45, 226, 194, 0.18), transparent 55%),
      radial-gradient(70% 60% at 90% 5%, rgba(176, 139, 255, 0.16), transparent 55%),
      radial-gradient(60% 50% at 50% 100%, rgba(224, 50, 107, 0.12), transparent 60%),
      linear-gradient(180deg, #0e1430 0%, var(--navy-deep) 55%, #0f1a3a 100%);
    color: #eaeefb;
    overflow: hidden;
  }
  .hero-wrap::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(to right, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 52px 52px;
    mask-image: radial-gradient(80% 70% at 50% 20%, #000 25%, transparent 100%);
    -webkit-mask-image: radial-gradient(80% 70% at 50% 20%, #000 25%, transparent 100%);
    pointer-events: none;
  }
  .hero-inner {
    position: relative;
    z-index: 1;
    max-width: 1180px;
    margin: 0 auto;
    padding: 3.5rem 1.5rem 3rem;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.5rem;
    align-items: center;
  }
  .hero-content { text-align: left; }
  .pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.42rem 1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--teal);
    font-family: var(--display);
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
  }
  .hero h1 {
    font-family: var(--display);
    font-size: clamp(2.2rem, 4.8vw, 3.85rem);
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 1rem;
    color: #fff;
    text-wrap: balance;
  }
  .hero h1 .grad {
    background: linear-gradient(105deg, var(--teal) 0%, #7ec8ff 42%, var(--pink) 88%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .hero-lead {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: rgba(200, 208, 235, 0.88);
    max-width: 540px;
    margin: 0 0 1.5rem;
  }
  .hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(234, 238, 251, 0.9);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
  }

  /* Hero visual / mock card */
  .hero-visual { position: relative; min-height: 320px; }
  .hero-mock {
    position: relative;
    border-radius: 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.12);
    overflow: hidden;
  }
  .hero-mock-head {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.18);
  }
  .hero-mock-dot { width: 0.55rem; height: 0.55rem; border-radius: 50%; }
  .hero-mock-dot:nth-child(1) { background: #ff6b8a; }
  .hero-mock-dot:nth-child(2) { background: #ffd166; }
  .hero-mock-dot:nth-child(3) { background: var(--teal); }
  .hero-mock-title {
    margin-left: 0.5rem;
    font-size: 0.72rem;
    font-weight: 600;
    color: rgba(200, 208, 235, 0.75);
    letter-spacing: 0.04em;
  }
  .hero-mock-body { padding: 1.1rem; display: grid; gap: 0.75rem; }
  .hero-mock-stat {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.35rem 0.75rem;
    align-items: center;
    padding: 0.75rem 0.85rem;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
  .hero-mock-stat span:first-child { font-size: 0.78rem; color: rgba(200, 208, 235, 0.8); }
  .hero-mock-stat strong { font-size: 0.95rem; color: var(--teal); font-variant-numeric: tabular-nums; }
  .hero-mock-bar { grid-column: 1 / -1; height: 0.35rem; border-radius: 999px; background: rgba(255, 255, 255, 0.08); overflow: hidden; }
  .hero-mock-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--teal), var(--blue)); }
  .hero-mock-bar i.w72 { width: 72%; }
  .hero-mock-bar i.w58 { width: 58%; }
  .hero-mock-bar i.w91 { width: 91%; }
  .hero-ring {
    position: absolute;
    width: 130%;
    height: 130%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid rgba(45, 226, 194, 0.15);
    pointer-events: none;
    z-index: -1;
  }
  .hero-ring.r2 {
    width: 108%;
    height: 108%;
    border-color: rgba(176, 139, 255, 0.12);
    border-style: dashed;
  }

  /* ---------- Proof strip ---------- */
  .proof {
    position: relative;
    background: linear-gradient(90deg, var(--navy-deep), #121a38, var(--navy-deep));
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .proof::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(50% 80% at 50% 50%, rgba(45, 226, 194, 0.08), transparent 70%);
    pointer-events: none;
  }
  .proof-grid {
    position: relative;
    max-width: 920px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-around;
    gap: 1rem;
  }
  .proof-item { text-align: center; flex: 1; }
  .pi-num {
    display: block;
    font-family: var(--display);
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(135deg, #fff 20%, var(--teal) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .pi-lbl {
    display: block;
    font-size: 0.82rem;
    color: rgba(200, 208, 235, 0.72);
    margin-top: 0.25rem;
    font-weight: 600;
    letter-spacing: 0.03em;
  }
  .proof-sep { width: 1px; align-self: stretch; background: rgba(255, 255, 255, 0.1); }

  /* ---------- Cards section (light) ---------- */
  .cards-section {
    background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
    border-top: 1px solid var(--line);
    padding: 4rem 1.5rem 3.5rem;
  }
  .cards-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
  }
  .eyebrow {
    display: inline-block;
    font-family: var(--display);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--blue);
    padding: 0.28rem 0.75rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    margin-bottom: 0.95rem;
  }
  .cards-head h2 {
    font-family: var(--display);
    font-size: clamp(1.65rem, 3.5vw, 2.35rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    margin: 0 0 0.65rem;
    color: var(--navy-deep);
  }
  .cards-head p { color: var(--muted); margin: 0; font-size: 1.02rem; }
  .columns {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
  .col {
    --accent: var(--student);
    position: relative;
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 1.1rem;
    padding: 1.65rem 1.45rem 1.5rem;
    overflow: hidden;
    transition: transform .2s ease, box-shadow .25s ease, border-color .2s ease;
  }
  .col--teacher { --accent: var(--teacher); }
  .col--writer { --accent: var(--writer); }
  .col::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #fff));
    opacity: 0.9;
  }
  .col:hover {
    transform: translateY(-6px);
    box-shadow: 0 22px 44px -22px rgba(22, 48, 122, 0.32);
    border-color: #d4dced;
  }
  .col-tag {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-family: var(--display);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
  }
  .col-tag i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px 1px color-mix(in srgb, var(--accent) 50%, transparent);
  }
  .col h3 {
    font-family: var(--display);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    margin: 14px 0 10px;
    color: var(--navy-deep);
  }
  .col p { color: var(--muted); font-size: 0.94rem; margin: 0 0 16px; }
  .promise-label {
    font-family: var(--display);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 4px 0 12px;
  }
  .feat { list-style: none; margin: 0 0 24px; padding: 0; display: grid; gap: 10px; }
  .feat li {
    position: relative;
    padding-left: 28px;
    font-size: 0.93rem;
    color: var(--ink);
  }
  .feat li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    border: 2px solid var(--accent);
    background: radial-gradient(circle at center, var(--accent) 0 2.5px, transparent 3px);
  }
  .cta-zone { margin-top: auto; }
  .cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    justify-content: center;
    font-family: var(--display);
    font-weight: 700;
    font-size: 0.96rem;
    text-decoration: none;
    color: var(--navy-deep);
    background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, var(--blue)));
    border: none;
    padding: 14px 20px;
    border-radius: 0.75rem;
    cursor: pointer;
    box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--accent) 60%, transparent);
    transition: transform .15s ease, box-shadow .2s ease;
  }
  .col--teacher .cta { color: var(--navy-deep); }
  .col--writer .cta { color: #fff; background: linear-gradient(135deg, var(--purple), var(--writer)); }
  .cta svg { transition: transform .2s ease; }
  .cta:hover { transform: translateY(-2px); box-shadow: 0 16px 32px -12px color-mix(in srgb, var(--accent) 55%, transparent); }
  .cta:hover svg { transform: translateX(4px); }
  .cta-note { display: block; margin-top: 12px; font-size: 0.82rem; color: var(--muted); text-align: center; }
  .cta-note b { color: var(--navy); font-weight: 700; }

  /* ---------- Footer ---------- */
  .lfoot {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: var(--navy-deep);
    color: rgba(200, 208, 235, 0.75);
  }
  .lfoot-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
  }
  .lfoot-links { display: flex; gap: 1.15rem; flex-wrap: wrap; }
  .lfoot-links a {
    color: rgba(200, 208, 235, 0.72);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
  }
  .lfoot-links a:hover { color: var(--teal); }
  .lfoot-copy { color: rgba(200, 208, 235, 0.55); font-size: 0.82rem; }
  .lfoot-links a.lfoot-staff {
    font-size: 0.75rem;
    font-weight: 500;
    color: rgba(200, 208, 235, 0.38);
  }
  .lfoot-links a.lfoot-staff:hover { color: rgba(45, 226, 194, 0.65); }

  .cookie-banner {
    position: fixed;
    inset: auto 16px 16px 16px;
    z-index: 9000;
    max-width: 520px;
    margin: 0 auto;
    left: 0;
    right: 0;
    padding: 16px 18px;
    border-radius: 14px;
    background: rgba(12, 16, 36, 0.96);
    border: 1px solid rgba(45, 226, 194, 0.22);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    color: rgba(220, 228, 245, 0.9);
    font-size: 0.86rem;
    line-height: 1.45;
  }
  .cookie-banner[hidden] { display: none !important; }
  .cookie-banner h2 {
    font-family: var(--display);
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0 0 8px;
    color: #fff;
  }
  .cookie-banner p { margin: 0 0 12px; }
  .cookie-banner a { color: var(--teal); text-decoration: underline; }
  .cookie-banner-actions { display: flex; flex-wrap: wrap; gap: 8px; }
  .cookie-btn {
    font-family: var(--display);
    font-weight: 600;
    font-size: 0.82rem;
    padding: 9px 14px;
    border-radius: 9px;
    border: none;
    cursor: pointer;
  }
  .cookie-btn-accept { background: var(--teal); color: var(--navy-deep); }
  .cookie-btn-reject { background: transparent; color: rgba(200, 208, 235, 0.85); border: 1px solid rgba(200, 208, 235, 0.25); }
  .cookie-btn-accept:hover { filter: brightness(1.05); }
  .cookie-btn-reject:hover { border-color: rgba(200, 208, 235, 0.45); }

  /* ---------- Modal (native dialog) — dark, unchanged hooks ---------- */
  dialog.modal {
    width: min(520px, 92vw);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 18px;
    background: #0f1530;
    color: #eaeefb;
    padding: 0;
    box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.7);
  }
  dialog.modal::backdrop { background: rgba(5, 8, 20, 0.72); backdrop-filter: blur(4px); }
  .modal-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 22px 24px 8px; }
  .modal-head h3 { font-family: var(--display); font-weight: 700; font-size: 1.25rem; margin: 0; letter-spacing: -0.01em; color: #fff; }
  .modal-head p { color: rgba(200, 208, 235, 0.75); font-size: .88rem; margin: 4px 0 0; }
  .modal-x { background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.12); color: rgba(200, 208, 235, 0.75); width: 34px; height: 34px; border-radius: 10px; font-size: 1.1rem; cursor: pointer; flex: none; }
  .modal-x:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
  .modal-body { padding: 8px 24px 24px; display: grid; gap: 12px; }
  .field { display: grid; gap: 5px; }
  .field label { font-size: .82rem; font-weight: 600; color: rgba(200, 208, 235, 0.75); }
  .field input, .field textarea, .field select {
    font: inherit;
    color: #eaeefb;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    padding: 10px 12px;
    width: 100%;
  }
  .field input::placeholder, .field textarea::placeholder { color: rgba(107, 114, 153, 0.9); }
  .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
  .consent { display: flex; align-items: flex-start; gap: 8px; font-size: .82rem; color: rgba(200, 208, 235, 0.75); }
  .consent input { margin-top: 3px; }
  .consent a { color: var(--teal); text-decoration: underline; }
  .modal-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--display);
    font-weight: 700;
    font-size: .98rem;
    color: var(--navy-deep);
    background: var(--accent, var(--teacher));
    border: none;
    padding: 13px 18px;
    border-radius: 11px;
    cursor: pointer;
  }
  .modal-submit:disabled { opacity: .6; cursor: default; }
  .modal-msg { font-size: .88rem; padding: 10px 12px; border-radius: 10px; display: none; }
  .modal-msg.ok { display: block; background: rgba(45, 226, 194, 0.12); color: var(--teal); border: 1px solid rgba(45, 226, 194, 0.3); }
  .modal-msg.err { display: block; background: rgba(255, 120, 120, 0.1); color: #ff9a9a; border: 1px solid rgba(255, 120, 120, 0.3); }

  a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 2px solid var(--teal);
    outline-offset: 2px;
    border-radius: 8px;
  }

  @media (max-width: 960px) {
    .hero-inner { grid-template-columns: 1fr; gap: 2rem; padding-top: 2.5rem; text-align: center; }
    .hero-content { text-align: center; }
    .hero-lead { margin-left: auto; margin-right: auto; }
    .hero-badges { justify-content: center; }
    .hero-visual { min-height: 260px; max-width: 420px; margin: 0 auto; }
  }
  @media (max-width: 860px) {
    .columns { grid-template-columns: 1fr; }
    .nav-badge { display: none; }
    .proof-grid { flex-direction: column; gap: 1.25rem; }
    .proof-sep { width: 60%; height: 1px; align-self: center; }
  }
  @media (max-width: 560px) {
    .row2 { grid-template-columns: 1fr; }
    .cards-section { padding: 3rem 1.25rem 2.5rem; }
  }

  @media (prefers-reduced-motion: no-preference) {
    .focus-target { animation: focusIn 1s cubic-bezier(.2, .8, .2, 1) both; }
    @keyframes focusIn { from { filter: blur(12px); opacity: 0; transform: translateY(10px); } to { filter: blur(0); opacity: 1; transform: none; } }
    .col { opacity: 0; animation: riseIn .75s cubic-bezier(.2, .8, .2, 1) both; }
    .col--student { animation-delay: .35s; }
    .col--teacher { animation-delay: .50s; }
    .col--writer { animation-delay: .65s; }
    @keyframes riseIn { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
    .hero-mock { animation: mockFloat 6s ease-in-out infinite; }
    @keyframes mockFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
  }
  @media (prefers-reduced-motion: reduce) {
    .focus-target, .col, .hero-mock { animation: none; opacity: 1; }
    .nav-badge i { animation: none; }
  }