/* ========================================
   CSS Reset & Base Styles
   ======================================== */

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

:root {
  /* Colors */
  --color-charcoal: #1E1F24;
  --color-off-white: #F6F7F9;
  --color-accent-teal: #00B3A4;
  --color-secondary-orange: #FF6A3D;
  --color-mid-gray: #8B90A0;

  /* Typography */
  --font-headline: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

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

  /* Layout */
  --max-width: 1200px;
  --section-padding: clamp(3rem, 8vw, 6rem);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-charcoal);
  background-color: var(--color-off-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

a {
  color: var(--color-accent-teal);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--color-charcoal);
  outline: 2px solid var(--color-accent-teal);
  outline-offset: 2px;
}

a:focus-visible {
  outline: 2px solid var(--color-accent-teal);
  outline-offset: 2px;
}

/* ========================================
   Utility Classes
   ======================================== */

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

.u-hidden {
  display: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-charcoal);
  color: var(--color-off-white);
  padding: var(--spacing-sm);
  z-index: 1000;
  text-decoration: none;
}

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

/* ========================================
   Header & Navigation
   ======================================== */

.header {
  background-color: var(--color-off-white);
  border-bottom: 1px solid rgba(30, 31, 36, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background-color: rgba(246, 247, 249, 0.95);
}

.header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.header__logo {
  display: flex;
  align-items: center;
  height: 40px;
}

.header__logo svg {
  height: 100%;
  width: auto;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  align-items: center;
}

.nav__link {
  color: var(--color-charcoal);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

.nav__link:hover,
.nav__link:focus {
  color: var(--color-accent-teal);
}

.nav__link--cta {
  background-color: var(--color-accent-teal);
  color: var(--color-off-white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 4px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.nav__link--cta:hover,
.nav__link--cta:focus {
  background-color: var(--color-charcoal);
  color: var(--color-off-white);
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .nav {
    gap: var(--spacing-sm);
    flex-wrap: wrap;
  }

  .nav__link {
    font-size: 0.875rem;
  }
}

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

.hero {
  padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero__title {
  margin-bottom: var(--spacing-sm);
  color: var(--color-charcoal);
}

.hero__subtitle {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  color: var(--color-mid-gray);
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero__cta {
  display: inline-block;
  margin-top: 0;
}

.hero__visual {
  margin-top: 0;
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.9;
  position: relative;
}

/* Hero visual animations: Subtle rotation for orbiting elements */
.hero-visual .hero-orbit-1 {
  animation: orbit-rotate 20s linear infinite;
  transform-origin: 300px 100px;
}

.hero-visual .hero-orbit-2 {
  animation: orbit-rotate 30s linear infinite reverse;
  transform-origin: 300px 100px;
}

.hero-visual .hero-orbit-3 {
  animation: orbit-rotate 40s linear infinite;
  transform-origin: 300px 100px;
}

@keyframes orbit-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-visual .hero-orbit-1,
  .hero-visual .hero-orbit-2,
  .hero-visual .hero-orbit-3 {
    animation: none;
  }
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-xl);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  line-height: 1.5;
}

.btn--primary {
  background-color: var(--color-accent-teal);
  color: var(--color-off-white);
}

.btn--primary:hover,
.btn--primary:focus {
  background-color: var(--color-charcoal);
  color: var(--color-off-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn--secondary:hover,
.btn--secondary:focus {
  background-color: var(--color-charcoal);
  color: var(--color-off-white);
}

/* ========================================
   Sections
   ======================================== */

.section {
  padding: var(--section-padding) var(--spacing-md);
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section__title {
  margin-bottom: var(--spacing-sm);
}

.section__intro {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--color-mid-gray);
  max-width: 700px;
  margin: 0 auto;
}

/* ========================================
   What We Do Section
   ======================================== */

.what-we-do {
  background-color: var(--color-off-white);
  /* padding-top: 0; */
}

.what-we-do__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.what-we-do__item {
  text-align: center;
  padding: var(--spacing-lg);
  transition: transform 0.3s ease;
}

.what-we-do__item:hover {
  transform: translateY(-4px);
}

.what-we-do__icon {
  margin-bottom: var(--spacing-md);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0.9;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.what-we-do__item:hover .what-we-do__icon {
  opacity: 1;
  transform: scale(1.05);
}

.what-we-do__item h3 {
  color: var(--color-accent-teal);
  margin-bottom: var(--spacing-sm);
}

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

.services {
  background-color: #ffffff;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.service-card {
  background-color: var(--color-off-white);
  padding: var(--spacing-xl);
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.service-card__icon {
  margin-bottom: var(--spacing-md);
  display: flex;
  justify-content: flex-start;
  align-items: center;
  opacity: 0.85;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.service-card:hover .service-card__icon {
  opacity: 1;
  transform: translateX(4px);
}

.service-card__title {
  color: var(--color-charcoal);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.service-card__description {
  color: var(--color-mid-gray);
  font-size: 1rem;
}

/* ========================================
   Experience Section
   ======================================== */

.experience {
  background-color: var(--color-off-white);
  position: relative;
  overflow: hidden;
}

/* CAD grid background pattern */
.experience__pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

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

.experience__intro {
  text-align: center;
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--color-mid-gray);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.experience__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-xl);
}

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: #ffffff;
  border: 1px solid rgba(30, 31, 36, 0.1);
  border-radius: 20px;
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  font-weight: 500;
}

/* ========================================
   Why Oxcidia Section
   ======================================== */

.why-oxcidia {
  background-color: #ffffff;
}

.why-oxcidia__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.why-oxcidia__item {
  padding: var(--spacing-lg);
  position: relative;
  transition: transform 0.3s ease;
}

.why-oxcidia__item:hover {
  transform: translateY(-2px);
}

.why-oxcidia__icon {
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  opacity: 0.85;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.why-oxcidia__item:hover .why-oxcidia__icon {
  opacity: 1;
  transform: scale(1.1);
}

.why-oxcidia__item h3 {
  color: var(--color-accent-teal);
  margin-bottom: var(--spacing-sm);
}

.why-oxcidia__quote {
  text-align: center;
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-style: italic;
  color: var(--color-mid-gray);
  margin-top: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* ========================================
   Selected Work Section
   ======================================== */

.selected-work {
  background-color: var(--color-off-white);
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.selected-work__message {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--color-mid-gray);
}

/* Selected Work grid with placeholder project frames */
.selected-work__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.work-item {
  transition: transform 0.3s ease;
}

.work-item:hover {
  transform: translateY(-4px);
}

.work-item__frame {
  aspect-ratio: 3 / 2;
  background-color: var(--color-off-white);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
  transition: box-shadow 0.3s ease;
}

.work-item:hover .work-item__frame {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.work-item__label {
  font-size: 0.9375rem;
  color: var(--color-mid-gray);
  font-weight: 500;
  margin-top: var(--spacing-xs);
}

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

.contact {
  background-color: #ffffff;
}

.contact__intro {
  text-align: center;
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--color-mid-gray);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.contact__form-wrapper {
  max-width: 600px;
  margin: var(--spacing-2xl) auto 0;
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.form__label {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--color-charcoal);
}

.form__label--required::after {
  content: ' *';
  color: var(--color-secondary-orange);
}

.form__input,
.form__textarea,
.form__select {
  padding: var(--spacing-sm);
  border: 1px solid rgba(30, 31, 36, 0.2);
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-accent-teal);
  box-shadow: 0 0 0 3px rgba(0, 179, 164, 0.1);
}

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

.form__checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.form__checkbox {
  margin-top: 4px;
}

.form__checkbox-label {
  font-weight: 400;
  margin-bottom: 0;
}

.form__submit {
  margin-top: var(--spacing-sm);
}

.form__response-time {
  font-size: 0.875rem;
  color: var(--color-mid-gray);
  text-align: center;
  margin-top: var(--spacing-xs);
  margin-bottom: 0;
}

.form__success {
  display: none;
  padding: var(--spacing-md);
  background-color: rgba(0, 179, 164, 0.1);
  border: 1px solid var(--color-accent-teal);
  border-radius: 4px;
  color: var(--color-charcoal);
  text-align: center;
  margin-top: var(--spacing-md);
}

.form__success--visible {
  display: block;
}

.contact__linkedin {
  text-align: center;
  margin-top: var(--spacing-xl);
}

.contact__linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-charcoal);
  font-weight: 500;
}

.contact__linkedin-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

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

.footer {
  background-color: var(--color-charcoal);
  color: var(--color-off-white);
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  position: relative;
}

/* Footer accent line */
.footer__accent {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  overflow: hidden;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer__company {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.footer__copyright {
  font-size: 0.9375rem;
  color: var(--color-mid-gray);
  margin-bottom: var(--spacing-xs);
}

.footer__social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.footer__social-link {
  color: var(--color-off-white);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: color 0.2s ease;
}

.footer__social-link:hover,
.footer__social-link:focus {
  color: var(--color-accent-teal);
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.footer__address {
  font-size: 0.9375rem;
  color: var(--color-mid-gray);
  margin-bottom: var(--spacing-md);
}

.footer__address.u-hidden {
  display: none;
}

.footer__nav {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__link {
  color: var(--color-mid-gray);
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

.footer__link:hover,
.footer__link:focus {
  color: var(--color-accent-teal);
}

/* ========================================
   Legal Pages
   ======================================== */

.legal-page {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.legal-page__title {
  margin-bottom: var(--spacing-md);
}

.legal-page__effective {
  color: var(--color-mid-gray);
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-xl);
}

.legal-page__section {
  margin-bottom: var(--spacing-xl);
}

.legal-page__section h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.legal-page__section h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
  margin-top: var(--spacing-md);
}

.legal-page__section p,
.legal-page__section ul {
  margin-bottom: var(--spacing-md);
}

.legal-page__section ul {
  padding-left: var(--spacing-lg);
}

.legal-page__section li {
  margin-bottom: var(--spacing-xs);
}

.legal-page__back-link {
  display: inline-block;
  margin-top: var(--spacing-xl);
  color: var(--color-accent-teal);
}

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

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
  }
}

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

@media (max-width: 768px) {
  .hero {
    padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-xl);
  }

  .hero__visual {
    max-width: 100%;
  }

  .section {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .what-we-do__grid,
  .services__grid,
  .why-oxcidia__grid,
  .selected-work__grid {
    grid-template-columns: 1fr;
  }

  .what-we-do__icon,
  .service-card__icon,
  .why-oxcidia__icon {
    transform: none !important;
  }

  .what-we-do__item:hover,
  .service-card:hover,
  .why-oxcidia__item:hover,
  .work-item:hover {
    transform: none;
  }
}