/* ================================================
   Native Ocean Software Studio — style.css
   ================================================ */

/* 1. Reset & Box Model */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* 2. Custom Properties */
:root {
  --bg-primary:   #09090f;
  --bg-surface:   #0e1320;
  --bg-card:      #121b2e;
  --border:       #1a2540;
  --border-light: #243352;

  --accent:       #38bdf8;
  --accent-dark:  #0284c7;
  --accent-glow:  rgba(56, 189, 248, 0.12);

  --text-primary:   #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted:     #7487a5;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Courier New', monospace;

  --radius:    6px;
  --radius-lg: 12px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 32px rgba(56, 189, 248, 0.08);

  --nav-height: 64px;
  --container:  1080px;
}

/* 3. Base */
html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: #fff; }

h1, h2, h3, h4 {
  line-height: 1.25;
  color: var(--text-primary);
}

p { color: var(--text-secondary); }

ul { list-style: none; }

/* 4. Layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 24px;
  max-width: var(--container);
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin-bottom: 48px;
  line-height: 1.75;
}

.policy-content {
  max-width: 760px;
}

.policy-blocks {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.policy-blocks h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

/* 5. Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 9, 15, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  flex-shrink: 0;
}
.logo:hover { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }

.nav-cta {
  background: var(--accent) !important;
  color: #090915 !important;
  padding: 7px 18px !important;
  border-radius: var(--radius);
  font-weight: 600 !important;
  transition: background 0.2s, color 0.2s;
}
.nav-cta:hover {
  background: #fff !important;
  color: #090915 !important;
}

.nav-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

/* 6. Buttons */
.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  border: none;
  line-height: 1;
}

.btn-primary {
  background: var(--accent);
  color: #090915;
}
.btn-primary:hover { background: #fff; color: #090915; }

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent-glow);
  color: #fff;
  border-color: #fff;
}

/* 7. Hero */
.hero {
  padding: 96px 24px 80px;
  max-width: var(--container);
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  max-width: 820px;
  margin-bottom: 24px;
}

.hero h1 .accent { color: var(--accent); }

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 8. Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-glow);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.1rem;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.card p {
  font-size: 0.88rem;
  line-height: 1.65;
}

/* 9. Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

/* 10. Technology tags */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-tag {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 13px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s;
}
.tech-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* 11. Flow Diagram */
.flow-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  width: 100%;
}

.flow-node {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 12px 32px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-align: center;
  white-space: normal;
  word-break: break-word;
  min-width: 0;
  max-width: 100%;
}
.flow-node.highlight {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.flow-arrow {
  color: var(--text-muted);
  font-size: 1.3rem;
  line-height: 1;
  padding: 8px 0;
  text-align: center;
}

/* 12. Case Studies */
.case-study {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s;
}
.case-study:hover { border-color: var(--border-light); }

.cs-header {
  padding: 24px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.cs-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.cs-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: 4px;
  padding: 4px 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

.cs-body {
  padding: 24px 28px;
  display: grid;
  gap: 20px;
}

.cs-section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 6px;
}

.cs-section p {
  font-size: 0.88rem;
}

.cs-result {
  background: rgba(56, 189, 248, 0.04);
  border: 1px solid rgba(56, 189, 248, 0.14);
  border-radius: var(--radius);
  padding: 14px 18px;
  grid-column: 1 / -1;
}
.cs-result .cs-section-label { color: #10b981; }
.cs-result p { color: var(--text-secondary); font-size: 0.88rem; }

/* 13. About layout */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-bio p {
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.8;
}

.experience-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.experience-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.experience-item:last-child { border-bottom: none; padding-bottom: 0; }

.exp-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding-top: 3px;
}

.exp-content h4 {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 2px;
}
.exp-content .exp-company {
  font-size: 0.82rem;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}
.exp-content p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 14. About preview strip */
.about-preview {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-preview .container {
  padding-top: 64px;
  padding-bottom: 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-preview h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  margin-bottom: 14px;
}

.about-preview p {
  font-size: 0.95rem;
  margin-bottom: 24px;
}

/* 15. CTA Section */
.cta-section {
  text-align: center;
  padding: 80px 24px;
}

.cta-section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 14px;
}

.cta-section p {
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 32px;
  font-size: 0.95rem;
}

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

/* 16. Contact Form */
.contact-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 56px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.contact-info p {
  font-size: 0.88rem;
  margin-bottom: 24px;
  line-height: 1.75;
}

.contact-detail {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.contact-detail a { color: var(--accent); }

.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.field input,
.field select,
.field textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  width: 100%;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.08);
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--text-muted);
}

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

.field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}

.field select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* 17. Page header (interior pages) */
.page-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 56px 24px 48px;
}

.page-header .container { padding: 0; }

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 580px;
}

/* 18. Services page */
.service-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}
.service-section:last-of-type { border-bottom: none; }

.service-section h2 {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.service-section > p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 32px;
  max-width: 560px;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 10px;
  margin-bottom: 40px;
}

.service-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.service-item::before {
  content: '›';
  color: var(--accent);
  font-size: 1rem;
  line-height: 1.5;
  flex-shrink: 0;
}

.flow-wrap {
  margin-top: 40px;
}
.flow-wrap h3 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* 19. Skills grid */
.skills-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.skill-group h4 {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 14px;
}

.skill-group .tech-tags { gap: 6px; }

.skill-group .tech-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
}

/* 20. Project type cards on homepage */
.project-types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.project-type-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: border-color 0.2s;
}
.project-type-card:hover { border-color: var(--border-light); }

.project-type-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.project-type-card p {
  font-size: 0.8rem;
  line-height: 1.6;
}

/* 21. Footer */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 32px 24px;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer p { font-size: 0.82rem; color: var(--text-muted); }
.footer a { font-size: 0.82rem; color: var(--text-muted); }
.footer a:hover { color: var(--accent); }

.footer-links { display: flex; gap: 24px; }

/* 22. Utility */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-accent { color: var(--accent); }

/* 23. Responsive */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
    border-top: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }

  .nav-links li a {
    display: block;
    padding: 11px 24px;
    font-size: 0.9rem;
  }

  .nav-cta {
    margin: 8px 24px 0 !important;
    padding: 10px 18px !important;
    text-align: center;
    display: block;
  }

  .hero { padding: 56px 20px 48px; }

  .about-layout,
  .contact-layout,
  .about-preview .container {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .form-row { grid-template-columns: 1fr; }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { max-width: 280px; }

  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { max-width: 280px; }

  .section { padding: 56px 20px; }

  .flow-diagram { padding: 24px 16px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }

  .cs-body { grid-template-columns: 1fr !important; }
  .cs-result { grid-column: auto !important; }
}

@media (min-width: 769px) {
  .cs-body { grid-template-columns: 1fr 1fr; }
}

@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;
    scroll-behavior: auto !important;
  }
}