/* ============================================================
   Openfield Labs LLC — Main Stylesheet
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --color-navy-deep: #060a14;
  --color-navy: #0b1622;
  --color-navy-light: #111d32;
  --color-accent: #00c896;
  --color-accent-dark: #009b6b;
  --color-accent-glow: rgba(0, 200, 150, 0.25);
  --color-accent-subtle: rgba(0, 200, 150, 0.08);
  --color-white: #ffffff;
  --color-offwhite: #f6f8fb;
  --color-light: #f0f4f8;
  --color-text: #1a2332;
  --color-text-secondary: #556678;
  --color-text-light: #8899aa;
  --color-border: #dde3ea;
  --color-border-light: #e8edf3;
  --color-card-bg: #ffffff;
  --color-card-shadow: rgba(6, 10, 20, 0.06);
  --color-error: #e74c3c;
  --color-success: #00c896;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --max-width: 1200px;
  --nav-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 3px rgba(6, 10, 20, 0.06);
  --shadow-md: 0 4px 16px rgba(6, 10, 20, 0.08);
  --shadow-lg: 0 8px 32px rgba(6, 10, 20, 0.10);
  --shadow-xl: 0 16px 48px rgba(6, 10, 20, 0.12);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-white);
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-navy-deep);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.7rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.3rem); }

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: 1.65;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav--scrolled {
  background: rgba(11, 22, 34, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.nav__logo {
  width: 36px;
  height: 36px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav__link {
  font-size: 0.925rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.72);
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
  transition: width var(--transition-base);
}

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

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

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

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

/* --- Hero (Home) --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-navy-deep);
  overflow: hidden;
  padding: 6rem 0 4rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -15%;
  width: 70%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(0, 200, 150, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 55%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(0, 200, 150, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero__content {
  position: relative;
  text-align: center;
  max-width: 820px;
  z-index: 1;
}

.hero__tagline {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.12;
  color: var(--color-white);
  margin-bottom: 1.5rem;
}

.hero__tagline span {
  color: var(--color-accent);
}

.hero__desc {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 560px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.01em;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-navy-deep);
}

.btn--primary:hover {
  background: #00e0a8;
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--color-accent-glow);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}

.btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.06);
}

.btn--outline-dark {
  background: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-border);
}

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

.btn--lg {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

/* --- Page Hero (Secondary Pages) --- */
.page-hero {
  background: var(--color-navy-deep);
  padding: 8rem 0 4.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -10%;
  width: 50%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(0, 200, 150, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__title {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.page-hero__subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.55);
  max-width: 560px;
  margin: 0 auto;
}

/* --- Section --- */
.section {
  padding: 6rem 0;
}

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

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

.section--dark .section-title,
.section--dark h2,
.section--dark h3 {
  color: var(--color-white);
}

.section--dark .section-subtitle {
  color: rgba(255, 255, 255, 0.55);
}

.section__header {
  text-align: center;
  margin-bottom: 3.5rem;
}

/* --- Value Props Grid (Home) --- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.value-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.value-card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
}

.value-card__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent-dark);
}

.value-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.value-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-deep) 100%);
  text-align: center;
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(0, 200, 150, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 2rem;
}

/* --- Cards Grid (Services, Technology) --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  font-size: 1.25rem;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.925rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- About Page --- */
.about-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.about-story__image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-navy-light);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-story__image svg {
  width: 60%;
  opacity: 0.6;
}

.about-story__content h2 {
  margin-bottom: 1rem;
}

.about-story__content p {
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.values-inline {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.value-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.value-item__marker {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-top: 0.55rem;
}

.value-item__text h4 {
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.value-item__text p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* --- Technology Page --- */
.tech-section {
  padding: 4rem 0;
}

.tech-section + .tech-section {
  border-top: 1px solid var(--color-border-light);
}

.ethic-banner {
  background: var(--color-accent-subtle);
  border: 1px solid rgba(0, 200, 150, 0.15);
  border-radius: var(--radius-lg);
  padding: 2.25rem 2rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.ethic-banner__icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.ethic-banner__content h3 {
  margin-bottom: 0.5rem;
}

.ethic-banner__content p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  margin-bottom: 1.5rem;
}

.contact-info__item svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.contact-info__item span {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.contact-info__item strong {
  display: block;
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.contact-form {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.contact-form h3 {
  margin-bottom: 0.4rem;
}

.contact-form > p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 1.75rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-offwhite);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group textarea {
  min-height: 130px;
  resize: vertical;
}

.form-note {
  font-size: 0.82rem;
  color: var(--color-text-light);
  text-align: center;
  margin-top: 1rem;
}

/* --- Footer --- */
.footer {
  background: var(--color-navy-deep);
  padding: 4rem 0 2rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer__logo {
  width: 28px;
  height: 28px;
}

.footer__desc {
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 280px;
}

.footer__col h4 {
  color: var(--color-white);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

.footer__col a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.6rem;
  transition: color var(--transition-fast);
}

.footer__col a:hover {
  color: var(--color-accent);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer__social {
  display: flex;
  gap: 1rem;
}

.footer__social a {
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--transition-fast);
}

.footer__social a:hover {
  color: var(--color-accent);
}

.footer__social svg {
  width: 20px;
  height: 20px;
}

/* --- Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.7s ease forwards;
}

.fade-in--1 { animation-delay: 0.1s; opacity: 0; }
.fade-in--2 { animation-delay: 0.25s; opacity: 0; }
.fade-in--3 { animation-delay: 0.4s; opacity: 0; }

/* --- Responsive --- */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-story {
    grid-template-columns: 1fr;
  }

  .about-story__image {
    aspect-ratio: 16/9;
    order: -1;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile (≤768px) */
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(11, 22, 34, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 5rem 2rem 2rem;
    gap: 1.75rem;
    transition: right var(--transition-slow);
    z-index: 999;
  }

  .nav__links--open {
    right: 0;
  }

  .nav__link {
    font-size: 1.1rem;
  }

  .nav__toggle {
    display: flex;
    z-index: 1001;
  }

  .values-grid,
  .values-inline {
    grid-template-columns: 1fr;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .hero__tagline {
    font-size: 2rem;
  }

  .hero__desc {
    font-size: 1rem;
  }

  .section {
    padding: 4rem 0;
  }

  .page-hero {
    padding: 6rem 0 3rem;
  }

  .contact-form {
    padding: 1.5rem;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

/* Small Mobile (≤480px) */
@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .btn {
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
  }
}