/* ===== Design tokens ===== */
:root {
  --color-navy: #0B1220;
  --color-blue-accent: #3B82F6;
  --color-blue-action: #1D4ED8;
  --color-gray-blue: #AEBBD1;
  --color-border: #DCE5F2;
  --color-bg-soft: #F4F7FC;
  --shadow-soft: 0 8px 20px rgba(11, 18, 32, 0.08);
  --shadow-lift: 0 16px 32px rgba(11, 18, 32, 0.14);
  --transition-fast: 0.2s ease;
}

/* ===== Global reset and base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', Arial, sans-serif;  /* Inter first, Arial as fallback */
  color: var(--color-navy);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

a, button {
  transition: color var(--transition-fast), background-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

/* ===== Navigation bar ===== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 40px;
  background-color: var(--color-navy);
}

.main-nav.is-scrolled {
  box-shadow: var(--shadow-lift);
}

.nav-logo {
  color: #FFFFFF;
  font-weight: bold;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;                 /* removes the bullet points */
}

.nav-links a {
  color: #FFFFFF;
  text-decoration: none;
  opacity: 0.85;
}

.nav-links a:hover {
  opacity: 1;
  color: var(--color-blue-accent);
}

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

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: #FFFFFF;
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

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

/* ===== Hero ===== */
.hero {
  background-color: var(--color-navy);
  color: #FFFFFF;
  display: flex;                    /* text and image side by side */
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
  padding: 100px 20px;
}

.hero-content {
  text-align: left;
  max-width: 520px;
}

.hero-image {
  width: 340px;
  border-radius: 16px;              /* soft corners, matches the cards */
  object-fit: cover;
  box-shadow: var(--shadow-lift);
}

.hero-role {
  color: var(--color-blue-accent);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.hero-headline {
  font-size: clamp(32px, 5vw, 44px);
  margin-bottom: 16px;
}

.hero-subtitle {
  color: var(--color-gray-blue);
  margin-bottom: 32px;
}

.hero-button {
  display: inline-block;
  background-color: var(--color-blue-action);
  color: #FFFFFF;
  text-decoration: none;
  padding: 14px 28px;
  border-radius: 8px;
}

.hero-button:hover {
  background-color: var(--color-blue-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

/* ===== Shared section styling ===== */
.section {
  max-width: 1000px;
  margin: 0 auto;                   /* centers the section */
  padding: 80px 20px;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.section-title {
  font-size: clamp(28px, 4vw, 32px);
  margin-bottom: 24px;
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);  /* 4 equal columns */
  gap: 16px;
}

.service-card {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: var(--color-blue-action);
}

/* ===== Projects ===== */
.project-card {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.project-links {
  display: flex;
  gap: 20px;
  margin-top: 8px;
}

.project-link {
  color: var(--color-blue-action);
  font-weight: bold;
}

.project-link:hover {
  color: var(--color-blue-accent);
}

.project-screenshot {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
  margin-bottom: 16px;
}

/* Flagship (Automation & POM) project gets stronger visual weight */
.section-flagship {
  background-color: var(--color-bg-soft);
}

.project-card-flagship {
  border: 2px solid var(--color-blue-action);
  padding: 32px;
  position: relative;
  background-color: #FFFFFF;
}

.project-card-flagship:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.project-badge {
  display: inline-block;
  background-color: var(--color-blue-action);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: bold;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

/* ===== Skills ===== */
.skills-list {
  display: flex;
  flex-wrap: wrap;                  /* wraps to a new line on small screens */
  gap: 12px;
  list-style: none;
}

.skills-list li {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 16px;
}

.skills-list li:hover {
  border-color: var(--color-blue-action);
  background-color: var(--color-bg-soft);
  transform: translateY(-2px);
}

/* ===== Contact ===== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 480px;
  margin-top: 24px;
}

.contact-form input,
.contact-form textarea {
  font: inherit;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-blue-action);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}

.contact-form-submit {
  border: none;
  cursor: pointer;
  align-self: flex-start;
  font: inherit;
}

.contact-form-status {
  color: var(--color-blue-action);
  font-size: 14px;
  min-height: 20px;
}

.contact-links {
  display: flex;
  gap: 20px;
  list-style: none;
  margin-top: 24px;
}

.contact-links a {
  color: var(--color-blue-action);
  font-weight: bold;
}

.contact-links a:hover {
  color: var(--color-blue-accent);
}

/* ===== Floating CTA ===== */
.floating-cta {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--color-blue-action);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: bold;
  padding: 14px 28px;
  border-radius: 999px;
  box-shadow: var(--shadow-lift);
  transition: opacity var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast);
  z-index: 100;
}

.floating-cta:hover {
  background-color: var(--color-blue-accent);
}

.floating-cta.is-hidden {
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--color-navy);
  color: var(--color-gray-blue);
  text-align: center;
  padding: 24px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .main-nav {
    padding: 16px 20px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background-color: var(--color-navy);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-fast);
  }

  .nav-links.is-open {
    max-height: 320px;
  }

  .nav-links li {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-links a {
    display: block;
    padding: 16px 20px;
  }

  .hero {
    flex-direction: column-reverse;
    text-align: center;
    padding: 60px 20px;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-image {
    width: 220px;
  }

  .section {
    padding: 56px 20px;
  }

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

  .floating-cta {
    bottom: 16px;
    right: 16px;
    padding: 12px 22px;
  }
}

@media (max-width: 480px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .project-card-flagship {
    padding: 24px;
  }
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .section,
  .service-card,
  .project-card,
  .project-card-flagship,
  .skills-list li,
  .hero-button,
  .floating-cta {
    transition: none;
  }
}