/* ============================================================
   QT Website — Styles
   Design: Dark-first, Anduril/Palantir inspired
   ============================================================ */

/* ---------- Custom Properties ---------- */
:root {
  /* Colors */
  --color-base: #0a1628;
  --color-dark: #061524;
  --color-navy: #003876;
  --color-navy-deep: #1F3864;
  --color-cyan: #06C9FF;
  --color-cyan-dim: rgba(6, 201, 255, 0.15);
  --color-amber: #FBC821;
  --color-white: #ffffff;
  --color-gray-100: #f0f4f8;
  --color-gray-300: #94a3b8;
  --color-gray-400: #64748b;
  --color-gray-500: #475569;
  --color-gray-800: #1e293b;
  --color-text: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-border: rgba(255, 255, 255, 0.08);

  /* Typography */
  --font-body: 'Montserrat', system-ui, -apple-system, sans-serif;
  --font-accent: 'Orbitron', var(--font-body);
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 2rem;
  --fs-4xl: 2.75rem;
  --fs-5xl: 3.5rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-section: 5rem;

  /* Layout */
  --container-max: 1200px;
  --container-px: 1.5rem;
  --header-h: 80px;

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration: 0.3s;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--duration) var(--ease);
}

a:hover {
  color: var(--color-white);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-white);
  font-weight: 600;
  line-height: 1.2;
}

address {
  font-style: normal;
}

/* ---------- Shared Components ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

.section {
  position: relative;
  padding: var(--space-section) 0;
  overflow: hidden;
}

.section--dark {
  background-color: var(--color-dark);
}

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

.section--black {
  background-color: var(--color-base);
}

.section__label {
  display: inline-block;
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-size: var(--fs-3xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  max-width: 720px;
}

.section__subtitle {
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
  max-width: 680px;
  margin-bottom: var(--space-2xl);
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.875rem 2rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  text-align: center;
  line-height: 1.4;
}

.btn--primary {
  background-color: var(--color-cyan);
  color: var(--color-base);
  border-color: var(--color-cyan);
}

.btn--primary:hover {
  background-color: transparent;
  color: var(--color-cyan);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn--outline:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

.btn--lg {
  padding: 1rem 2.5rem;
  font-size: var(--fs-sm);
}

/* ---------- HEADER ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background-color var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
}

.header--scrolled {
  background-color: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: var(--space-lg);
}

.header__logo {
  flex-shrink: 0;
}

.header__logo-img {
  height: 60px;
  width: auto;
}

.header__nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.header__nav-list {
  display: flex;
  gap: var(--space-lg);
}

.header__nav-link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-gray-300);
  letter-spacing: 0.02em;
  padding: 0.25rem 0;
  position: relative;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-cyan);
  transition: width var(--duration) var(--ease);
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-white);
}

.header__nav-link:hover::after,
.header__nav-link--active::after {
  width: 100%;
}

.header__cta {
  flex-shrink: 0;
  padding: 0.625rem 1.5rem;
  font-size: var(--fs-xs);
}

.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  transition: transform var(--duration) var(--ease),
              opacity var(--duration) var(--ease);
}

.header__hamburger--open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger--open span:nth-child(2) {
  opacity: 0;
}

.header__hamburger--open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 22, 40, 0.7) 0%,
    rgba(10, 22, 40, 0.85) 50%,
    rgba(10, 22, 40, 0.95) 100%
  );
}

.hero__watermark {
  position: absolute;
  right: -10%;
  top: 10%;
  width: 60vw;
  max-width: 800px;
  height: auto;
  z-index: 1;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: var(--space-3xl) 0;
}

.hero .section__label {
  font-size: var(--fs-2xl);
  letter-spacing: 0.3em;
}

.hero__title {
  font-size: var(--fs-4xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  max-width: 700px;
  line-height: 1.1;
}

.hero__subtitle {
  font-size: var(--fs-xl);
  color: var(--color-text);
  max-width: 620px;
  margin-bottom: var(--space-sm);
}

.hero__tagline {
  font-size: var(--fs-lg);
  color: var(--color-text-muted);
  max-width: 580px;
  margin-bottom: var(--space-2xl);
}

.hero__ctas {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ---------- ABOUT ---------- */
.about__intro {
  margin-bottom: var(--space-3xl);
}

.about__intro .section__title {
  margin-top: var(--space-sm);
}

.about__lead {
  font-size: var(--fs-xl);
  color: var(--color-white);
  margin-bottom: var(--space-md);
  max-width: 680px;
}

.about__intro > p:last-child {
  max-width: 680px;
  color: var(--color-text-muted);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.about__card {
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.02);
}

.about__card-title {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-md);
  color: var(--color-cyan);
}

.about__card p {
  margin-bottom: var(--space-sm);
}

.about__mission-list {
  list-style: none;
}

.about__mission-list li {
  padding-left: var(--space-lg);
  position: relative;
  margin-bottom: var(--space-xs);
}

.about__mission-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 2px;
  background-color: var(--color-cyan);
}

.about__values {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-2xl);
}

.about__values-title {
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: var(--space-xl);
}

.about__values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.about__value {
  text-align: center;
}

.about__value-accent {
  display: block;
  font-family: var(--font-accent);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-cyan);
  opacity: 0.4;
  margin-bottom: var(--space-xs);
}

.about__value h4 {
  font-size: var(--fs-sm);
  font-weight: 500;
}

/* ---------- PLATFORM ---------- */
.platform {
  position: relative;
}

.platform__watermark {
  position: absolute;
  left: -15%;
  top: 5%;
  width: 50vw;
  max-width: 700px;
  height: auto;
  z-index: 0;
  pointer-events: none;
}

.platform .container {
  position: relative;
  z-index: 1;
}

.platform__statement {
  font-size: var(--fs-xl);
  color: var(--color-gray-300);
  margin-bottom: var(--space-3xl);
  text-align: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.platform__statement strong {
  color: var(--color-white);
  font-size: var(--fs-2xl);
  display: block;
  margin-top: var(--space-xs);
}

.platform__pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.platform__card {
  padding: var(--space-2xl) var(--space-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.2);
  transition: border-color var(--duration) var(--ease),
              transform var(--duration) var(--ease);
}

.platform__card:hover {
  border-color: var(--color-cyan);
  transform: translateY(-4px);
}

.platform__card-icon {
  width: 48px;
  height: 48px;
  color: var(--color-cyan);
  margin-bottom: var(--space-md);
}

.platform__card-icon svg {
  width: 100%;
  height: 100%;
}

.platform__card-num {
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  color: var(--color-cyan);
  opacity: 0.5;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: var(--space-xs);
}

.platform__card-title {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-sm);
}

.platform__card p {
  font-size: var(--fs-sm);
  color: var(--color-gray-300);
  line-height: 1.7;
}

/* Row of 5: first row 3, second row 2 centered */
.platform__pillars .platform__card:nth-child(4),
.platform__pillars .platform__card:nth-child(5) {
  /* will be centered via grid */
}

/* ---------- ORIGIN ---------- */
.origin__header {
  margin-bottom: var(--space-3xl);
}

.origin__header .section__subtitle {
  margin-bottom: var(--space-md);
}

.origin__insight {
  font-size: var(--fs-lg);
  color: var(--color-text);
  max-width: 680px;
}

.origin__insight strong {
  color: var(--color-cyan);
}

.origin__doctrine {
  margin-bottom: var(--space-3xl);
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.01);
}

.origin__doctrine-title {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-sm);
}

.origin__doctrine-lead {
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
  max-width: 640px;
}

.origin__doctrine-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.origin__doctrine-item {
  padding: var(--space-md);
  border-left: 2px solid var(--color-cyan);
}

.origin__doctrine-num {
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  color: var(--color-cyan);
  opacity: 0.6;
  display: block;
  margin-bottom: var(--space-xs);
}

.origin__doctrine-item p {
  font-size: var(--fs-sm);
  color: var(--color-text);
}

.origin__veterans {
  padding: var(--space-2xl);
  border-left: 3px solid var(--color-amber);
  background: rgba(251, 200, 33, 0.03);
}

.origin__veterans-title {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-sm);
}

.origin__veterans p {
  max-width: 680px;
}

.origin__veterans-accent strong {
  color: var(--color-amber);
}

/* ---------- CAPABILITIES ---------- */
.capabilities__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.capabilities__item {
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color var(--duration) var(--ease),
              transform var(--duration) var(--ease);
}

.capabilities__item:hover {
  border-color: var(--color-cyan);
  transform: translateY(-4px);
}

.capabilities__icon {
  width: 48px;
  height: 48px;
  color: var(--color-cyan);
  margin-bottom: var(--space-md);
}

.capabilities__icon svg {
  width: 100%;
  height: 100%;
}

.capabilities__item h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-sm);
}

.capabilities__item p {
  font-size: var(--fs-sm);
  color: var(--color-gray-300);
}

/* ---------- PARTNERS ---------- */
.partners__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

.partners__card {
  padding: var(--space-2xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.15);
  text-align: center;
  transition: border-color var(--duration) var(--ease);
}

.partners__card:hover {
  border-color: var(--color-cyan);
}

.partners__card-icon {
  width: 48px;
  height: 48px;
  color: var(--color-cyan);
  margin: 0 auto var(--space-md);
}

.partners__card-icon svg {
  width: 100%;
  height: 100%;
}

.partners__card h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-sm);
}

.partners__card p {
  font-size: var(--fs-sm);
  color: var(--color-gray-300);
}

.partners__compliance {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-2xl);
}

.partners__compliance-inner {
  max-width: 640px;
}

.partners__compliance h3 {
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-amber);
  margin-bottom: var(--space-sm);
}

.partners__compliance p {
  color: var(--color-gray-300);
}

.partners__compliance strong {
  color: var(--color-white);
}

/* ---------- CONTACT ---------- */
.contact__wrapper {
  max-width: 800px;
  position: relative;
}

.contact__form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.contact__field {
  display: flex;
  flex-direction: column;
}

.contact__field--full {
  margin-bottom: var(--space-lg);
}

.contact__label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-gray-300);
  margin-bottom: var(--space-xs);
}

.contact__input {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  transition: border-color var(--duration) var(--ease);
  outline: none;
  -webkit-appearance: none;
}

.contact__input:focus {
  border-color: var(--color-cyan);
}

.contact__input.contact__input--error {
  border-color: #ef4444;
}

.contact__select {
  cursor: pointer;
}

.contact__select option {
  background: var(--color-dark);
  color: var(--color-text);
}

.contact__textarea {
  resize: vertical;
  min-height: 120px;
}

.contact__submit {
  border: 2px solid transparent;
}

.contact__success {
  display: none;
  text-align: center;
  padding: var(--space-3xl) var(--space-2xl);
}

.contact__success.contact__success--visible {
  display: block;
}

.contact__success-icon {
  width: 64px;
  height: 64px;
  color: var(--color-cyan);
  margin: 0 auto var(--space-lg);
}

.contact__success h3 {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-sm);
}

.contact__success p {
  color: var(--color-text-muted);
}

.contact__inquiries {
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.contact__inquiries h3 {
  font-family: var(--font-accent);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: var(--space-md);
}

.contact__inquiries-list {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.contact__inquiries-list span {
  font-weight: 500;
  color: var(--color-white);
}

.contact__inquiries p {
  color: var(--color-text-muted);
}

/* ---------- FOOTER ---------- */
.footer {
  background-color: var(--color-base);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--space-2xl);
}

.footer__brand {
  flex: 1;
  min-width: 240px;
}

.footer__logo {
  height: 32px;
  width: auto;
  margin-bottom: var(--space-md);
}

.footer__address {
  font-size: var(--fs-sm);
  color: var(--color-gray-400);
  line-height: 1.8;
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.footer__link {
  font-size: var(--fs-sm);
  color: var(--color-gray-400);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__copy {
  width: 100%;
  font-size: var(--fs-xs);
  color: var(--color-gray-500);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

/* ---------- BACK TO TOP ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--color-cyan);
  border: none;
  cursor: pointer;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--duration) var(--ease),
              visibility var(--duration) var(--ease),
              transform var(--duration) var(--ease);
}

.back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
  color: var(--color-base);
}

.back-to-top:hover {
  background: var(--color-white);
}

/* ---------- RESPONSIVE: Tablet (768px) ---------- */
@media (max-width: 1024px) {
  :root {
    --space-section: 4rem;
    --fs-4xl: 2.25rem;
    --fs-3xl: 1.75rem;
  }

  .hero__title {
    font-size: var(--fs-3xl);
  }

  .platform__pillars {
    grid-template-columns: repeat(2, 1fr);
  }

  .origin__doctrine-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .capabilities__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 3rem;
    --fs-5xl: 2.25rem;
    --fs-4xl: 1.875rem;
    --fs-3xl: 1.5rem;
    --fs-2xl: 1.25rem;
    --header-h: 64px;
  }

  /* Header mobile */
  .header__nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    justify-content: flex-start;
    padding: var(--space-2xl) var(--container-px);
    transform: translateX(100%);
    transition: transform var(--duration) var(--ease);
  }

  .header__nav--open {
    transform: translateX(0);
  }

  .header__nav-list {
    flex-direction: column;
    gap: var(--space-md);
  }

  .header__nav-link {
    font-size: var(--fs-xl);
  }

  .header__cta {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  /* Hero */
  .hero__title {
    font-size: var(--fs-3xl);
  }

  .hero__watermark {
    width: 90vw;
    right: -30%;
    top: 5%;
  }

  .hero__ctas {
    flex-direction: column;
  }

  .hero__ctas .btn {
    text-align: center;
  }

  /* About */
  .about__grid {
    grid-template-columns: 1fr;
  }

  .about__values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Platform */
  .platform__pillars {
    grid-template-columns: 1fr;
  }

  /* Origin */
  .origin__doctrine-grid {
    grid-template-columns: 1fr;
  }

  /* Capabilities */
  .capabilities__grid {
    grid-template-columns: 1fr;
  }

  /* Partners */
  .partners__grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact__form-grid {
    grid-template-columns: 1fr;
  }

  .contact__inquiries-list {
    flex-direction: column;
    gap: var(--space-sm);
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
  }

  .footer__links {
    order: 1;
  }
}

/* ---------- RESPONSIVE: Large (1440px+) ---------- */
@media (min-width: 1440px) {
  :root {
    --container-max: 1320px;
    --fs-5xl: 4rem;
    --fs-4xl: 3rem;
  }

  .hero__title {
    font-size: var(--fs-5xl);
  }
}