/* Digital Forensics Exchange — site styles
   Tokens and components from the DFX design system. */

:root {
  --surface: #FFFFFF;
  --surface-subtle: #F5F7F8;
  --surface-raised: #FFFFFF;
  --surface-inverse: #151D24;
  --ink: #151D24;
  --ink-muted: #5A6A76;
  --ink-inverse: #F5F7F8;
  --border: #DFE5E9;
  --border-strong: #7B8A95;
  --primary: #10B981;
  --primary-hover: #059669;
  --on-primary: #151D24;
  --primary-text: #047857;
  --primary-soft: #D1FAE5;
  --on-primary-soft: #065F46;
  --secondary: #F59E0B;
  --secondary-text: #B45309;
  --tertiary: #8B5CF6;
  --tertiary-text: #6D28D9;
  --tertiary-soft: #EDE9FE;
  --on-tertiary-soft: #5B21B6;
  --logo-x: #059669;
  --focus-ring: #047857;
  --error: #B91C1C;

  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(21,29,36,.06), 0 1px 3px rgba(21,29,36,.08);
  --shadow-md: 0 4px 12px rgba(21,29,36,.08), 0 2px 4px rgba(21,29,36,.06);
}

/* Base ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--surface); color: var(--ink); font: 400 16px/26px var(--font-sans); -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: var(--primary-text); }
a:hover { color: var(--on-primary-soft); }
:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
h1, h2, h3, p { margin: 0; }
[id] { scroll-margin-top: 24px; }

.skip-link { position: absolute; left: 16px; top: -100px; z-index: 10; padding: 10px 16px; border-radius: var(--radius-sm); background: var(--surface-inverse); color: var(--ink-inverse); font: 500 14px/20px var(--font-mono); }
.skip-link:focus { top: 16px; color: var(--ink-inverse); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.container { max-width: 1200px; margin: 0 auto; padding-inline: 24px; }
.section { padding-block: 96px; }
.section--subtle { background: var(--surface-subtle); border-block: 1px solid var(--border); }
@media (max-width: 720px) { .section { padding-block: 64px; } }

.split { display: flex; flex-wrap: wrap; gap: 40px 64px; }
.split__head { flex: 1 1 320px; min-width: 0; }
.split__body { flex: 999 1 520px; min-width: 0; }

.h2 { font: 800 40px/48px var(--font-sans); letter-spacing: -0.02em; }
@media (max-width: 720px) { .h2 { font-size: 32px; line-height: 40px; } }
.lead { font: 400 20px/32px var(--font-sans); max-width: 680px; }
.muted { color: var(--ink-muted); }
.body-lg { font-size: 18px; line-height: 28px; }
.stack { display: flex; flex-direction: column; gap: 40px; }
.stack--tight { gap: 12px; }

/* Logo ------------------------------------------------------------ */
.logo { display: inline-block; line-height: 0; }
.logo svg { width: auto; }
.logo .ink { fill: var(--ink); }
.logo .x { fill: var(--logo-x); }
.logo .name { fill: var(--ink); font-family: var(--font-sans); font-weight: 700; font-size: 20px; }
.logo--header svg { height: 64px; }
.logo--footer svg { height: 72px; }

/* Buttons --------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 16px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer; text-decoration: none; text-align: center;
  font: 500 14px/20px var(--font-mono); letter-spacing: 0.02em;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn--lg { min-height: 52px; padding: 12px 24px; font-size: 15px; }
.btn--primary { background: var(--primary); color: var(--on-primary); }
.btn--primary:hover { background: var(--primary-hover); color: var(--on-primary); }
.btn--secondary { background: var(--surface-subtle); color: var(--ink); border-color: var(--border); }
.btn--secondary:hover { border-color: var(--border-strong); color: var(--ink); }
.btn--outlined { background: transparent; color: var(--ink); border-color: var(--border-strong); }
.btn--outlined:hover { background: var(--surface-subtle); color: var(--ink); }
.btn--ghost-dark { background: transparent; color: #F5F7F8; border-color: #7B8A95; }
.btn--ghost-dark:hover { background: #24303A; color: #F5F7F8; }
.btn[disabled] { opacity: .6; cursor: progress; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* Header ---------------------------------------------------------- */
.site-header { background: var(--surface); }
.site-header__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; }
.site-header__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
@media (max-width: 600px) {
  .site-header__cta { display: none; }
  .logo--header svg { height: 52px; }
}
.nav { display: inline-flex; align-items: center; gap: 4px; padding: 4px; border-radius: var(--radius-pill); background: var(--surface-raised); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.nav a { display: inline-flex; align-items: center; height: 40px; padding: 0 16px; border-radius: var(--radius-pill); color: var(--ink-muted); text-decoration: none; font: 500 12px/16px var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; }
.nav a:hover { color: var(--ink); background: var(--surface-subtle); }
.nav a[aria-current="page"] { background: var(--primary); color: var(--on-primary); }

.tri-stripe { display: flex; height: 4px; }
.tri-stripe span:nth-child(1) { flex: 6; background: var(--primary); }
.tri-stripe span:nth-child(2) { flex: 2; background: var(--secondary); }
.tri-stripe span:nth-child(3) { flex: 1; background: var(--tertiary); }

/* Hero ------------------------------------------------------------ */
.hero { background: var(--surface-inverse); color: var(--ink-inverse); }
.hero__inner { display: flex; flex-wrap: wrap; align-items: center; gap: 56px; padding-block: 96px; }
@media (max-width: 720px) { .hero__inner { padding-block: 64px; gap: 40px; } }
.hero__copy { flex: 999 1 560px; min-width: 0; display: flex; flex-direction: column; gap: 28px; }
.hero__tagline { font: 500 12px/16px var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: #34D399; }
.hero__title { font: 800 clamp(44px, 7vw, 84px)/1 var(--font-sans); letter-spacing: -0.035em; color: #F5F7F8; }
.hero__sub { max-width: 620px; font: 400 21px/32px var(--font-sans); color: #C5CED5; }
.pill { display: inline-flex; align-self: flex-start; align-items: center; gap: 8px; padding: 8px 14px; border: 1px solid #3A4852; border-radius: var(--radius-pill); font: 500 14px/20px var(--font-mono); letter-spacing: 0.04em; color: #F5F7F8; }
.pill__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.hero__actions { padding-top: 4px; }
.hero__art { flex: 1 1 340px; min-width: 0; display: flex; justify-content: center; }
.hero__panel { position: relative; width: 100%; max-width: 460px; aspect-ratio: 1 / 1; border: 1px solid #2E3B46; border-radius: var(--radius-lg); overflow: hidden; background: #1C262E; }
.hero__grid, .hero__node { position: absolute; }
.hero__grid { inset: 0; width: 100%; height: 100%; }
.hero__node { left: 11%; top: 11%; width: 78%; height: 78%; }

/* Brand graphics (hex node + grid), dark context */
.gfx-dark .gl { fill: none; stroke: #2E3B46; stroke-width: 1; }
.gfx-dark .dg { fill: #A3B0BA; fill-opacity: .45; }
.gfx-dark .orbit { stroke: #A3B0BA; stroke-width: 1.5; stroke-dasharray: 1 7; }
.gfx-dark .hex { stroke: var(--primary); stroke-width: 4; }
.gfx-dark .hex-fill { fill: #0F2E25; }
.gfx-dark .spoke { stroke: var(--primary); stroke-width: 3; }
.gfx-dark .spoke-a { stroke: var(--secondary); stroke-width: 3; }
.gfx-dark .ring { stroke: #EEF2F4; stroke-width: 3; }
.gfx-dark .core, .gfx-dark .n-g { fill: var(--primary); }
.gfx-dark .n-a { fill: var(--secondary); }
.gfx-dark .n-v { fill: var(--tertiary); }

/* Cards ----------------------------------------------------------- */
.cards { display: flex; flex-wrap: wrap; gap: 20px; }
.card { flex: 1 1 340px; min-width: 0; display: flex; flex-direction: column; gap: 10px; padding: 28px; border-radius: var(--radius-lg); background: var(--surface-raised); border: 1px solid var(--border); border-top: 4px solid var(--primary); box-shadow: var(--shadow-sm); }
.card--amber { border-top-color: var(--secondary); }
.card--violet { border-top-color: var(--tertiary); }
.card__num { font: 500 13px/20px var(--font-mono); color: var(--primary-text); }
.card--amber .card__num { color: var(--secondary-text); }
.card--violet .card__num { color: var(--tertiary-text); }
.card__title { font: 700 22px/30px var(--font-sans); }
.card__body { font: 400 15px/24px var(--font-sans); color: var(--ink-muted); }
.card--cta { justify-content: space-between; gap: 16px; background: var(--tertiary-soft); border: 1px solid transparent; box-shadow: none; }
.card--cta .card__title { color: var(--on-tertiary-soft); }

/* Checklist ------------------------------------------------------- */
.checklist { margin: 0; padding: 0; list-style: none; }
.checklist li { display: flex; gap: 16px; align-items: center; padding: 18px 0; border-top: 1px solid var(--border); font: 500 18px/28px var(--font-sans); }
.checklist li:last-child { border-bottom: 1px solid var(--border); }
.checklist li::before { content: ""; flex: none; width: 7px; height: 13px; margin: 0 6px 4px 4px; border: solid var(--primary-text); border-width: 0 2.5px 2.5px 0; transform: rotate(45deg); }

/* Sign-up --------------------------------------------------------- */
.signup { position: relative; overflow: hidden; background: var(--surface-subtle); border-top: 1px solid var(--border); }
.signup__pattern { position: absolute; inset: 0; width: 100%; height: 100%; }
.signup__inner { position: relative; }
.signup__panel { display: flex; flex-wrap: wrap; gap: 40px 56px; align-items: flex-start; padding: 48px; border-radius: var(--radius-lg); background: var(--surface-raised); border: 1px solid var(--border); box-shadow: var(--shadow-md); }
@media (max-width: 720px) { .signup__panel { padding: 28px 20px; } }
.signup__intro { flex: 1 1 320px; min-width: 0; display: flex; flex-direction: column; gap: 20px; }
.signup__title { font: 800 44px/52px var(--font-sans); letter-spacing: -0.02em; }
@media (max-width: 720px) { .signup__title { font-size: 34px; line-height: 42px; } }
.signup__form-wrap { flex: 1.4 1 460px; min-width: 0; }

.form { display: flex; flex-direction: column; gap: 20px; }
.form__row { display: flex; flex-wrap: wrap; gap: 16px; }
.form__row > .field { flex: 1 1 200px; }
.field { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.field__label { font: 500 12px/16px var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-muted); }
.input { display: flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 12px; border-radius: var(--radius-sm); background: var(--surface-raised); border: 1px solid var(--border-strong); color: var(--ink-muted); }
.input:focus-within { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.input input, .input select { flex: 1; min-width: 0; height: 42px; border: 0; padding: 0; margin: 0; background: transparent; font: 400 16px/22px var(--font-sans); color: var(--ink); outline: none; }
.input select { appearance: none; -webkit-appearance: none; cursor: pointer; }
.input select:invalid { color: var(--ink-muted); }
.input input::placeholder { color: var(--ink-muted); }
.input svg { width: 18px; height: 18px; flex: none; pointer-events: none; }
.input:has(:user-invalid) { border-color: var(--error); }

.fieldset { margin: 0; padding: 0; border: 0; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.fieldset legend { padding: 0; margin-bottom: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 16px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); background: var(--surface-raised); font: 500 14px/20px var(--font-sans); cursor: pointer; }
.chip input { width: 18px; height: 18px; margin: 0; accent-color: var(--primary-hover); }
.chip:has(input:checked) { border-color: var(--primary-hover); background: var(--primary-soft); color: var(--on-primary-soft); }
.chip:has(input:focus-visible) { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.consent { display: flex; gap: 10px; align-items: flex-start; padding: 16px; border-radius: var(--radius-md); background: var(--surface-subtle); font: 400 15px/22px var(--font-sans); cursor: pointer; }
.consent input { flex: none; width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--primary-hover); cursor: pointer; }
.form-error { margin: 0; font: 500 14px/20px var(--font-sans); color: var(--error); }
.form-error[hidden] { display: none; }
.hp { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.success { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; padding: 24px 0; }
.success[hidden] { display: none; }
.success__icon { display: inline-grid; place-items: center; width: 56px; height: 56px; border-radius: 50%; background: var(--primary-soft); color: var(--on-primary-soft); }
.success__title { font: 800 32px/40px var(--font-sans); letter-spacing: -0.01em; }

/* FAQ ------------------------------------------------------------- */
.faq-section { border-top: 1px solid var(--border); }
.faq { border-top: 1px solid var(--border); }
.faq:last-child { border-bottom: 1px solid var(--border); }
.faq summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 22px 0; cursor: pointer; font: 700 19px/28px var(--font-sans); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--surface-subtle); font: 500 20px/1 var(--font-mono); color: var(--ink); }
.faq[open] summary::after { content: "–"; background: var(--primary); color: var(--on-primary); }
.faq p { padding: 0 48px 24px 0; color: var(--ink-muted); }
@media (max-width: 600px) { .faq p { padding-right: 0; } }

/* Footer ---------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--border); }
.site-footer--subtle { background: var(--surface-subtle); }
.site-footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 32px; padding-block: 56px; }
.site-footer__links { display: flex; flex-wrap: wrap; gap: 8px 24px; font: 500 12px/16px var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; }
.site-footer__links a { padding-block: 6px; }
.site-footer__links .email { text-transform: none; letter-spacing: 0.02em; }

/* Sponsor page ---------------------------------------------------- */
.page-intro__inner { display: flex; flex-wrap: wrap; gap: 48px 64px; align-items: center; padding-block: 88px 80px; }
@media (max-width: 720px) { .page-intro__inner { padding-block: 56px; } }
.page-intro__copy { flex: 999 1 540px; min-width: 0; display: flex; flex-direction: column; gap: 24px; }
.page-title { font: 800 clamp(40px, 5.4vw, 64px)/1.04 var(--font-sans); letter-spacing: -0.03em; }
.page-intro__lead { max-width: 640px; font: 400 20px/31px var(--font-sans); }

.facts { flex: 1 1 360px; min-width: 0; margin: 0; padding: 8px 28px; border-radius: var(--radius-lg); background: var(--surface-subtle); border: 1px solid var(--border); }
.facts > div { display: flex; flex-direction: column; gap: 6px; padding: 20px 0; border-bottom: 1px solid var(--border); }
.facts > div:last-child { border-bottom: 0; }
.facts dt { font: 500 12px/16px var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--primary-text); }
.facts dt.amber { color: var(--secondary-text); }
.facts dt.violet { color: var(--tertiary-text); }
.facts dd { margin: 0; }
.facts dd.big { font: 700 22px/30px var(--font-sans); }

.section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px; }
.section-head p { max-width: 420px; font-size: 15px; line-height: 24px; }

.tiers { display: flex; flex-wrap: wrap; gap: 20px; align-items: stretch; }
.tier { flex: 1 1 320px; min-width: 0; display: flex; flex-direction: column; gap: 20px; padding: 32px; border-radius: var(--radius-lg); background: var(--surface-raised); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
@media (max-width: 720px) { .tier { padding: 24px; } }
.tier--gold { border: 2px solid var(--primary); box-shadow: var(--shadow-md); }
.tier--silver { border-top: 4px solid var(--secondary); }
.tier--bronze { border-top: 4px solid var(--tertiary); }
.tier__name { font: 800 28px/36px var(--font-sans); }
.tier__price { display: flex; align-items: baseline; gap: 8px; }
.tier__amount { font: 800 44px/1 var(--font-sans); letter-spacing: -0.02em; }
.tier__currency { font: 500 13px/20px var(--font-mono); color: var(--ink-muted); }
.tier__desc { font-size: 15px; line-height: 24px; color: var(--ink-muted); }
.tier__cta { margin-top: auto; }
.tier-list { margin: 0; padding: 16px 0 0; list-style: none; display: flex; flex-direction: column; gap: 10px; border-top: 1px solid var(--border); }
.tier-list li { display: flex; gap: 14px; align-items: baseline; font: 400 15px/23px var(--font-sans); }
.tier-list li::before { content: ""; flex: none; width: 5px; height: 10px; margin-left: 3px; border: solid var(--primary-text); border-width: 0 2px 2px 0; transform: translateY(-2px) rotate(45deg); }
.note { font-size: 15px; line-height: 24px; color: var(--ink-muted); }

.addons { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 12px; }
.addon { flex: 1 1 260px; display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 20px 22px; border-radius: var(--radius-md); background: var(--surface-subtle); border: 1px solid var(--border); }
.addon--accent { background: var(--tertiary-soft); border-color: transparent; color: var(--on-tertiary-soft); }
.addon__name { font: 600 16px/24px var(--font-sans); }
.addon__price { font: 500 15px/22px var(--font-mono); white-space: nowrap; }

.book { background: var(--surface-inverse); color: var(--ink-inverse); }
.book__inner { display: flex; flex-wrap: wrap; gap: 48px 64px; align-items: flex-start; }
.book__steps-wrap { flex: 999 1 540px; min-width: 0; display: flex; flex-direction: column; gap: 28px; }
.book .h2 { color: #F5F7F8; }
.steps { margin: 0; padding: 0; list-style: none; }
.steps li { display: flex; gap: 20px; padding: 20px 0; border-top: 1px solid #2E3B46; font: 400 17px/26px var(--font-sans); color: #EEF2F4; }
.steps li:last-child { border-bottom: 1px solid #2E3B46; }
.steps__num { flex: none; font: 500 14px/26px var(--font-mono); color: #34D399; }
.steps li:nth-child(2) .steps__num { color: #FBBF24; }
.steps li:nth-child(3) .steps__num { color: #A78BFA; }
.steps a { color: #6EE7B7; overflow-wrap: anywhere; }
.steps a:hover { color: #A7F3D0; }
.book-card { flex: 1 1 340px; min-width: 0; display: flex; flex-direction: column; gap: 20px; padding: 32px; border-radius: var(--radius-lg); background: #1C262E; border: 1px solid #2E3B46; }
.book-card h3 { font: 700 24px/33px var(--font-sans); color: #F5F7F8; }
.book-card p { color: #A3B0BA; }

/* Simple content page --------------------------------------------- */
.prose { max-width: 720px; display: flex; flex-direction: column; gap: 20px; }
.prose p, .prose li { font-size: 17px; line-height: 28px; }
.prose h2 { margin-top: 20px; font: 700 24px/32px var(--font-sans); letter-spacing: -0.01em; }
.prose ul { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 6px; }