:root {
  color-scheme: dark;
  --midnight-navy: #07111c;
  --deep-slate: #111c2a;
  --charcoal-blue: #1a2636;
  --soft-white: #f3f5f7;
  --muted-gray: #98a2b3;
  --signal-lime: #d7ff00;
  --cool-cyan: #22afff;
  --border: #243041;
  --border-bright: #2f3f54;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --header-h: 4rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-serif);
  background: var(--midnight-navy);
  color: var(--soft-white);
  line-height: 1.65;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 0.5rem 1rem;
  background: var(--signal-lime);
  color: var(--midnight-navy);
  font-family: var(--font-sans);
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Site header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7, 17, 28, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 72rem;
  height: 100%;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--soft-white);
  text-decoration: none;
}

.logo__mark {
  display: block;
  width: 2rem;
  height: 2rem;
  border-radius: 0.375rem;
  object-fit: cover;
  flex-shrink: 0;
}

.logo__text {
  line-height: 1;
}

.nav-cta {
  padding: 0.5rem 0.875rem;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--midnight-navy);
  background: var(--signal-lime);
  border-radius: 0.25rem;
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

.nav-cta:hover {
  background: #e4ff4d;
  box-shadow: 0 0 0 1px rgba(215, 255, 0, 0.25);
}

/* Hero */

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 3.5rem 1.25rem 4rem;
  border-bottom: 1px solid var(--border);
}

.hero__backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-color: var(--midnight-navy);
  background-image: url("assets/brand/hess-hero-waveform-16x9-primary.webp");
  background-size: cover;
  background-position: center 35%;
  background-repeat: no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(7, 17, 28, 0.82) 0%, rgba(7, 17, 28, 0.94) 55%, rgba(17, 28, 42, 0.98) 100%),
    linear-gradient(90deg, rgba(7, 17, 28, 0.92) 0%, rgba(7, 17, 28, 0.55) 55%, rgba(7, 17, 28, 0.88) 100%);
}

.hero__inner {
  position: relative;
  max-width: 44rem;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cool-cyan);
}

.hero__headline {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 5.5vw, 2.75rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 24px rgba(7, 17, 28, 0.65);
}

.hero__positioning {
  margin: 0 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--soft-white);
}

.hero__hook {
  margin: 0 0 1.25rem;
  font-size: clamp(1.0625rem, 2.8vw, 1.25rem);
  font-weight: 400;
  line-height: 1.45;
  color: var(--soft-white);
  border-left: 3px solid var(--signal-lime);
  padding-left: 1rem;
}

.hero__subheadline {
  margin: 0 0 1rem;
  font-size: 1.0625rem;
  color: var(--muted-gray);
}

.hero__support {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: var(--muted-gray);
}

.hero__actions {
  margin-bottom: 1.5rem;
}

.hero__microcopy {
  margin: 0.875rem 0 0;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--muted-gray);
}

.hero__domain {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #6d7a8c;
}

/* Sections */

.section {
  position: relative;
  padding: 3.5rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.section--panel {
  background: var(--deep-slate);
}

.section--matrix {
  background: var(--midnight-navy);
}

.section--matrix .section__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.14;
  background-image: url("assets/brand/hess-section-waveform-wide.webp");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  pointer-events: none;
}

.section--matrix .section__inner {
  position: relative;
  z-index: 1;
}

.section--form {
  background: linear-gradient(180deg, var(--midnight-navy) 0%, var(--deep-slate) 100%);
  padding-bottom: 3rem;
}

.section--disclaimer {
  background: var(--deep-slate);
  padding-top: 0;
}

.disclaimer-callout {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border-bright);
  border-left: 3px solid var(--signal-lime);
  border-radius: 0.375rem;
  background: rgba(7, 17, 28, 0.55);
}

.disclaimer-callout p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--muted-gray);
}

.disclaimer-callout p + p {
  margin-top: 0.75rem;
}

.section--songprint {
  background: var(--deep-slate);
}

.section__inner {
  max-width: 44rem;
  margin: 0 auto;
}

.section__inner--split {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.section__label {
  margin: 0 0 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cool-cyan);
}

.section h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.25rem, 3vw, 1.625rem);
  font-weight: 400;
  line-height: 1.2;
}

.section__intro {
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  color: var(--muted-gray);
}

.matrix-figure {
  margin: 0 0 2rem;
}

.matrix-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  box-shadow: 0 16px 40px rgba(7, 17, 28, 0.45);
}

.matrix-figure figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  line-height: 1.5;
  color: #6d7a8c;
  text-align: center;
}

/* Diagnostic matrix */

.diag-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
}

.diag-matrix__cell {
  position: relative;
  padding: 1.25rem 1.25rem 1.125rem 1.375rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: linear-gradient(145deg, rgba(26, 38, 54, 0.92) 0%, rgba(17, 28, 42, 0.88) 100%);
  border-left: 3px solid var(--cool-cyan);
  box-shadow: 0 8px 24px rgba(7, 17, 28, 0.35);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.diag-matrix__cell:hover {
  border-color: var(--border-bright);
  border-left-color: var(--signal-lime);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(7, 17, 28, 0.45);
}

.diag-matrix__index {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--signal-lime);
}

.diag-matrix__label {
  display: block;
  margin-bottom: 0.375rem;
  font-family: var(--font-sans);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #6d7a8c;
}

.diag-matrix__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--soft-white);
}

.diag-matrix__desc {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted-gray);
  line-height: 1.5;
}

/* Songprint preview */

.songprint-copy__lead {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--soft-white);
}

.songprint-copy__body {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted-gray);
}

.songprint-figure {
  margin: 0;
}

.songprint-figure img {
  display: block;
  width: 100%;
  max-width: 28rem;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  box-shadow: 0 16px 40px rgba(7, 17, 28, 0.5);
}

.songprint-figure figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  line-height: 1.5;
  color: #6d7a8c;
  text-align: center;
}

/* Lists */

.bullet-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.bullet-list li {
  position: relative;
  margin-bottom: 0.875rem;
  padding-left: 1.125rem;
  color: var(--muted-gray);
}

.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.375rem;
  height: 0.375rem;
  background: var(--cool-cyan);
  border-radius: 50%;
}

.bullet-list li:last-child {
  margin-bottom: 0;
}

/* Capability matrix */

.capability-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  overflow: hidden;
}

.capability-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.375rem;
  padding: 1rem 1.125rem;
  border-bottom: 1px solid var(--border);
  background: rgba(26, 38, 54, 0.45);
}

.capability-row:last-child {
  border-bottom: none;
}

.capability-row__name {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--cool-cyan);
}

.capability-row__desc {
  font-size: 0.875rem;
  color: var(--muted-gray);
  line-height: 1.5;
}

/* Process */

.process-list {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
  color: var(--muted-gray);
}

.process-list li {
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

.process-list strong {
  color: var(--soft-white);
  font-weight: 600;
}

.process-note {
  margin: 0;
  padding: 1rem 1.125rem;
  font-size: 0.875rem;
  color: var(--muted-gray);
  border: 1px solid var(--border-bright);
  border-left: 3px solid var(--cool-cyan);
  border-radius: 0.25rem;
  background: rgba(7, 17, 28, 0.5);
}

.section--approach {
  background: var(--deep-slate);
}

.approach-body p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--muted-gray);
  line-height: 1.65;
}

.approach-body p:last-child {
  margin-bottom: 0;
}

.approach-body strong {
  color: var(--soft-white);
  font-weight: 600;
}

/* Founder */

.section--founder {
  background: var(--midnight-navy);
}

.founder {
  margin: 0;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--signal-lime);
  background: rgba(26, 38, 54, 0.55);
}

.founder p {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--muted-gray);
  line-height: 1.65;
}

.founder p:last-child {
  margin-bottom: 0;
}

/* Form */

.form-intro {
  margin: 0 0 1.25rem;
  color: var(--muted-gray);
}

.warning-callout {
  margin: 0 0 1.5rem;
  padding: 1rem 1.125rem;
  border: 1px solid var(--border-bright);
  border-left: 3px solid var(--cool-cyan);
  border-radius: 0.375rem;
  background: rgba(34, 175, 255, 0.06);
}

.warning-callout p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--soft-white);
}

.warning-callout p + p {
  margin-top: 0.625rem;
}

.interest-form {
  display: grid;
  gap: 1.125rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--charcoal-blue);
}

.field label {
  display: block;
  margin-bottom: 0.375rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--soft-white);
}

.required {
  color: var(--signal-lime);
}

.optional {
  font-weight: 400;
  color: var(--muted-gray);
}

.field input,
.field select {
  width: 100%;
  padding: 0.75rem 0.875rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--soft-white);
  background: var(--midnight-navy);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input::placeholder {
  color: #5c6570;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--cool-cyan);
  box-shadow: 0 0 0 2px rgba(34, 175, 255, 0.2);
}

.field-hint {
  margin: 0 0 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted-gray);
}

.field-hint--warning {
  padding: 0.625rem 0.75rem;
  color: var(--soft-white);
  border: 1px solid var(--border-bright);
  border-left: 3px solid var(--cool-cyan);
  border-radius: 0.25rem;
  background: rgba(7, 17, 28, 0.45);
}

.field--checkbox {
  margin-top: 0.25rem;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--muted-gray);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  flex-shrink: 0;
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 0.15rem;
  accent-color: var(--cool-cyan);
  cursor: pointer;
}

.field--consent {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  background: rgba(7, 17, 28, 0.35);
}

.privacy-link {
  color: var(--cool-cyan);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.privacy-link:hover {
  color: var(--signal-lime);
}

.privacy-note {
  margin: 0.625rem 0 0 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  line-height: 1.5;
  color: #6d7a8c;
}

/* Buttons */

.btn {
  display: inline-block;
  padding: 0.875rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  text-align: center;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

.btn--primary {
  color: var(--midnight-navy);
  background: var(--signal-lime);
}

.btn--primary:hover {
  background: #e4ff4d;
  box-shadow: 0 0 0 1px rgba(215, 255, 0, 0.3);
}

.btn--primary:active {
  transform: translateY(1px);
}

.btn--full {
  width: 100%;
  margin-top: 0.25rem;
}

/* Footer */

.site-footer {
  padding: 2.5rem 1.25rem;
  background: var(--deep-slate);
  border-top: 1px solid var(--border);
}

.site-footer__inner {
  max-width: 44rem;
  margin: 0 auto;
}

.site-footer__brand {
  margin: 0 0 0.375rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer__tag {
  margin: 0 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--muted-gray);
}

.site-footer__disclaimer,
.site-footer__scope {
  margin: 0 0 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: #6d7a8c;
  line-height: 1.5;
}

.site-footer__scope {
  margin-bottom: 0;
}

/* Responsive */

@media (min-width: 36rem) {
  .diag-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 48rem) {
  .hero {
    padding: 4.5rem 2rem 5rem;
  }

  .hero__backdrop {
    background-image: url("assets/brand/hess-hero-waveform-wide-secondary.webp");
    background-position: center 40%;
  }

  .section {
    padding: 4rem 2rem;
  }

  .section__inner--split {
    grid-template-columns: 1fr 1fr;
    max-width: 72rem;
    gap: 2.5rem;
  }

  .songprint-figure img {
    margin: 0;
    max-width: none;
  }

  .interest-form {
    padding: 1.75rem;
    gap: 1.25rem;
  }

  .diag-matrix {
    grid-template-columns: repeat(3, 1fr);
  }

  .diag-matrix__cell:nth-child(4),
  .diag-matrix__cell:nth-child(5),
  .diag-matrix__cell:nth-child(6) {
    grid-column: span 1;
  }

  .capability-row {
    grid-template-columns: 11rem 1fr;
    gap: 1.5rem;
    align-items: start;
  }
}

@media (min-width: 64rem) {
  .diag-matrix {
    grid-template-columns: repeat(3, 1fr);
  }

  .diag-matrix__cell:nth-child(4),
  .diag-matrix__cell:nth-child(5),
  .diag-matrix__cell:nth-child(6) {
    grid-column: auto;
  }
}