/* ==========================================================================
   Nock Technologies — Design System
   ========================================================================== */

/* ---------- Custom Properties ---------- */
:root {
  /* Colors */
  --navy: #1E3A5F;
  --navy-light: rgba(30, 58, 95, 0.1);
  --mint: #2D8B75;
  --coral: #E8836B;
  --coral-light: rgba(232, 131, 107, 0.1);
  --bg: #FAFBFD;
  --text-primary: #1A1A2E;
  --text-secondary: #64748B;
  --card-bg: #FFFFFF;
  --border: #E2E8F0;
  --construction-overlay: rgba(241, 245, 249, 0.6);
  --emerald: #10B981;

  /* Typography */
  --font-sans: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Spacing */
  --section-py: 120px;
  --container-max: 1200px;
  --container-px: 24px;

  /* Motion */
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --dur-fast: 160ms;
  --dur-normal: 200ms;
  --dur-slow: 300ms;

  /* Shadows — Stripe multi-layer blue-tinted formula */
  --shadow-sm: 0 1px 3px rgba(30, 58, 95, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(30, 58, 95, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
  --shadow-lg: rgba(30, 58, 95, 0.25) 0px 30px 45px -30px, rgba(0, 0, 0, 0.1) 0px 18px 36px -18px;
  --shadow-hover: rgba(30, 58, 95, 0.3) 0px 24px 40px -20px, rgba(0, 0, 0, 0.12) 0px 14px 28px -14px;
  --shadow-ambient: rgba(30, 58, 95, 0.08) 0px 15px 35px 0px;

  /* Layout */
  --nav-height: 72px;
}


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

html {
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}


/* ---------- Focus Indicators ---------- */
:focus-visible {
  outline: 2px solid var(--navy);
  outline-offset: 2px;
}

.btn-primary:focus-visible {
  outline-color: var(--coral);
}

.product-card--dev:focus-visible {
  outline-color: var(--emerald);
}


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


/* ---------- Typography ---------- */
.section-heading {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: var(--fw-medium);
  color: var(--navy);
  margin-bottom: 12px;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.section-subheading {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 48px;
  max-width: 560px;
}


/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: var(--fw-medium);
  border-radius: 6px;
  letter-spacing: -0.01em;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-normal) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--coral);
  color: #FFFFFF;
}

@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover {
    box-shadow: 0 4px 16px rgba(232, 131, 107, 0.3);
  }
}

.btn-secondary {
  background-color: transparent;
  color: var(--navy);
  border: 2px solid var(--border);
}

@media (hover: hover) and (pointer: fine) {
  .btn-secondary:hover {
    border-color: var(--navy);
  }
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.9375rem;
  font-weight: var(--fw-semibold);
  color: var(--mint);
  transition: color var(--dur-fast) var(--ease-out);
}

.btn-text span {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .btn-text:hover span {
    transform: translateX(4px);
  }
}


/* ==========================================================================
   Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: transparent;
  transition: background-color var(--dur-normal) var(--ease-out),
              box-shadow var(--dur-normal) var(--ease-out);
}

.site-header.scrolled {
  background-color: rgba(250, 251, 253, 0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
  display: flex;
  align-items: center;
  height: var(--nav-height);
  gap: 8px;
}

.nav-logo {
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-right: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .nav-link:hover {
    color: var(--text-primary);
  }
}

.nav-cta {
  margin-left: 24px;
  padding: 9px 18px;
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  color: #FFFFFF;
  background-color: var(--coral);
  border-radius: 5px;
  letter-spacing: -0.01em;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-normal) var(--ease-out);
}

.nav-cta:active {
  transform: scale(0.97);
}

@media (hover: hover) and (pointer: fine) {
  .nav-cta:hover {
    box-shadow: 0 4px 12px rgba(232, 131, 107, 0.25);
  }
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  min-width: 44px;
  min-height: 44px;
  padding: 10px;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--navy);
  border-radius: 1px;
  transition: transform var(--dur-normal) var(--ease-out),
              opacity var(--dur-fast) var(--ease-out);
}

.nav-hamburger.active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ---------- Mobile Menu ---------- */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  z-index: 99;
  background-color: var(--card-bg);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-out);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

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

.mobile-menu-inner {
  display: flex;
  flex-direction: column;
  padding: calc(var(--nav-height) + 32px) 32px calc(32px + env(safe-area-inset-bottom, 0px));
  gap: 8px;
  min-height: 100%;
}

.mobile-menu-link {
  font-size: 1.125rem;
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--dur-fast) var(--ease-out);
}

.mobile-menu-cta {
  margin-top: 16px;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: var(--fw-medium);
  color: #FFFFFF;
  background-color: var(--coral);
  border-radius: 6px;
  text-align: center;
  letter-spacing: -0.01em;
}


/* ---------- Mobile Menu Overlay ---------- */
.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 98;
  background-color: rgba(26, 26, 46, 0.3);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-normal) var(--ease-out);
}

.mobile-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}


/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding-top: calc(var(--nav-height) + var(--section-py));
  padding-bottom: var(--section-py);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-headline {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 400;
  color: var(--navy);
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: 20px;
}

.hero-subhead {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-geometric {
  width: 100%;
  max-width: 460px;
  height: auto;
}


/* ==========================================================================
   Services Section
   ========================================================================== */

.services {
  padding: var(--section-py) 0;
}

.services-header {
  margin-bottom: 48px;
}

/* Vertical stack with left border — not a card grid */
.services-list {
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.service-item {
  display: flex;
  gap: 24px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.service-item:last-child {
  border-bottom: 1px solid var(--border);
}

.service-item__num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  color: var(--navy);
  opacity: 0.35;
  padding-top: 3px;
  flex-shrink: 0;
  width: 28px;
  letter-spacing: 0.02em;
}

.service-item__body {
  flex: 1;
}

.service-item__title {
  font-size: 1.125rem;
  font-weight: var(--fw-medium);
  color: var(--navy);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.service-item__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.service-item__cta {
  margin-top: 16px;
}


/* ==========================================================================
   Partners Section
   ========================================================================== */

.partners {
  padding: var(--section-py) 0;
  background-color: var(--card-bg);
}

.partners-header {
  margin-bottom: 24px;
}

.partners-placeholder {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 48px;
  max-width: 480px;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  min-height: 80px;
}


/* ==========================================================================
   About Section
   ========================================================================== */

.about {
  padding: var(--section-py) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: start;
}

.about-lead {
  font-size: clamp(1.125rem, 1.8vw, 1.375rem);
  font-weight: 400;
  color: var(--navy);
  line-height: 1.5;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.about-body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.about-credentials {
  font-size: 0.875rem;
  font-weight: var(--fw-semibold);
  color: var(--mint);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.about-visual {
  width: 100%;
  aspect-ratio: 4 / 5;
  background-color: var(--bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.about-visual svg {
  width: 100%;
  height: auto;
}


/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact {
  padding: var(--section-py) 0;
  background-color: var(--card-bg);
}

.contact-inner {
  max-width: 640px;
  text-align: center;
  margin: 0 auto;
}

.contact-subhead {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 36px;
}

.contact-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}


/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo {
  font-size: 0.9375rem;
  font-weight: var(--fw-semibold);
  color: var(--navy);
  letter-spacing: -0.02em;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .footer-link:hover {
    color: var(--text-primary);
  }
}

.footer-link-placeholder {
  opacity: 0.5;
  cursor: default;
}

.footer-social {
  display: flex;
  gap: 16px;
}


/* ==========================================================================
   Scroll Animations
   ========================================================================== */

/* Visible by default; JS adds .js-ready to <html> to enable animations */
.js-ready .fade-in {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s var(--ease-out),
              transform 0.4s var(--ease-out);
}

.js-ready .fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for grid children */
.services-list .fade-in:nth-child(2) {
  transition-delay: 60ms;
}

.services-list .fade-in:nth-child(3) {
  transition-delay: 120ms;
}


/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .fade-in,
  .js-ready .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn,
  .nav-cta {
    transition: none !important;
  }

  .mobile-menu,
  .mobile-overlay,
  .hamburger-line {
    transition: none;
  }
}


/* ==========================================================================
   Articles Page
   ========================================================================== */

/* ---------- Articles Header ---------- */
.articles-header {
  padding-top: calc(var(--nav-height) + var(--section-py));
  padding-bottom: 48px;
}

.articles-headline {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  color: var(--navy);
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: 16px;
}

.articles-subhead {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 500px;
}


/* ---------- Article List ---------- */
.articles-list {
  padding-bottom: var(--section-py);
}

.article-card {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.article-card:first-child {
  border-top: 1px solid var(--border);
}

.article-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.article-card__date {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
}

.article-card__tag {
  font-size: 0.6875rem;
  font-weight: var(--fw-semibold);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-card__tag--business {
  background-color: var(--navy-light);
  color: var(--navy);
}

.article-card__tag--ai {
  background-color: rgba(45, 139, 117, 0.12);
  color: var(--mint);
}

.article-card__tag--industry {
  background-color: var(--coral-light);
  color: var(--coral);
}

.article-card__tag--operations {
  background-color: rgba(100, 116, 139, 0.12);
  color: var(--text-secondary);
}

.article-card__title {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: var(--fw-medium);
  color: var(--navy);
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin-bottom: 8px;
}

.article-card__title a {
  transition: color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .article-card__title a:hover {
    color: var(--mint);
  }
}

.article-card__excerpt {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
  max-width: 640px;
}

.article-card__read {
  font-size: 0.875rem;
  font-weight: var(--fw-semibold);
  color: var(--mint);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .article-card__read:hover {
    color: var(--navy);
  }
}


/* ---------- Active Nav Link ---------- */
.nav-link--active {
  color: var(--text-primary);
}


/* ==========================================================================
   Responsive
   ========================================================================== */

/* Tablet: 1024px */
@media (max-width: 1024px) {
  :root {
    --section-py: 96px;
  }

  .hero-grid {
    gap: 40px;
  }

  .about-grid {
    gap: 40px;
  }

}

/* Mobile: 768px */
@media (max-width: 768px) {
  :root {
    --section-py: 80px;
    --container-px: 20px;
  }

  /* Nav: show hamburger */
  .js-ready .nav-links,
  .js-ready .nav-cta {
    display: none;
  }

  .js-ready .nav-hamburger {
    display: flex;
  }

  /* Hero: single column */
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-geometric {
    max-width: 280px;
    opacity: 0.7;
  }

  /* Services: already stacked via 1024px breakpoint */

  /* About: single column */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-photo {
    max-width: 320px;
  }

  /* Partners grid: 2 columns on mobile */
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Footer: stack */
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-brand {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  /* Section headings */
  .section-heading {
    margin-bottom: 8px;
  }

  .section-subheading {
    margin-bottom: 32px;
  }
}