/* Santhosh Kumar J - Dark theme. */
:root {
  --color-bg: #0f1419;
  --color-surface: #1a2332;
  --color-card: #232f3e;
  --color-primary: #00a8e8;
  --color-primary-hover: #48cae4;
  --color-text: #e6edf3;
  --color-text-muted: #8b9cad;
  --color-border: #2d3a4d;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, monospace;
  --space-unit: 8px;
  --container: min(100% - 2rem, 1100px);
  --header-h: 72px;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,.25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }
ul { list-style: none; margin: 0; padding: 0; }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  padding: .75rem 1rem;
  background: var(--color-primary);
  color: #fff;
  z-index: 9999;
  transition: top .2s;
}
.skip-link:focus { top: 0; }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(15, 20, 25, .95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.logo-link img { height: 44px; width: auto; }
.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  flex-shrink: 0;
}
.brand-name { font-size: 1.15rem; font-weight: 700; color: var(--color-text); letter-spacing: .02em; }
.brand-role { font-size: .8rem; color: var(--color-primary); }
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-left: auto;
  flex-shrink: 0;
}
.social-links {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
}
.social-links a {
  color: var(--color-text-muted);
  padding: .35rem;
  border-radius: var(--radius);
  transition: color .2s, background .2s;
}
.social-links a:hover { color: var(--color-primary); background: rgba(0,168,232,.1); }
.social-links .social-icon { width: 24px; height: 24px; display: block; }

/* Nav */
.nav-menu {
  display: flex;
  align-items: center;
  gap: .25rem;
}
.nav-menu a {
  padding: .5rem .85rem;
  font-size: .9rem;
  color: var(--color-text-muted);
  border-radius: var(--radius);
  transition: color .2s, background .2s;
}
.nav-menu a:hover,
.nav-menu a.active { color: var(--color-primary); background: rgba(0,168,232,.1); }
.nav-toggle {
  display: none;
  padding: .5rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  cursor: pointer;
}

/* Main */
.main-content { padding-top: var(--header-h); }
.section {
  padding: 4rem 1rem;
  max-width: var(--container);
  margin: 0 auto;
}
.section-title { font-size: clamp(1.75rem, 4vw, 2.25rem); margin: 0 0 .5rem; color: var(--color-text); }
.section-desc { color: var(--color-text-muted); margin: 0 0 2rem; max-width: 70ch; }

/* Hero / Home */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
  padding: 3rem 1rem 4rem;
}
.hero-text { font-size: 1.05rem; color: var(--color-text-muted); }
.hero-text p { margin: 0 0 1rem; }
.hero-photo {
  flex-shrink: 0;
  width: 200px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.hero-photo img { width: 100%; height: auto; }
.quote-block {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  font-style: italic;
  color: var(--color-text-muted);
}

/* Portfolio grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}
.portfolio-item {
  background: var(--color-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s;
}
.portfolio-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.portfolio-item a { display: block; color: inherit; }
.portfolio-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: opacity .2s;
  background: var(--color-surface);
}
.portfolio-item img[src*="no-image.svg"] {
  object-fit: contain;
  padding: 1rem;
}
.portfolio-item:hover img { opacity: .9; }
.portfolio-item span {
  display: block;
  padding: .75rem 1rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.service-card {
  background: var(--color-card);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.service-card h2 {
  font-size: 1.1rem;
  margin: 0 0 .75rem;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.service-card h2 a { color: inherit; }
.service-card .icon { width: 40px; height: 40px; object-fit: contain; flex-shrink: 0; }
.service-card p { margin: 0; font-size: .95rem; color: var(--color-text-muted); line-height: 1.6; }
.service-card h3 { font-size: 1rem; margin: 1rem 0 .35rem; color: var(--color-text); }
.service-card h3 + p { margin-top: 0; }

/* Contact */
.contact-email { word-break: break-all; }
.contact-form {
  max-width: 480px;
  margin-top: 1.5rem;
}
.contact-form label { display: block; margin-bottom: .25rem; font-size: .9rem; color: var(--color-text-muted); }
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: .65rem .85rem;
  margin-bottom: 1rem;
  font: inherit;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form button {
  padding: .75rem 1.5rem;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .2s;
}
.contact-form button:hover { background: var(--color-primary-hover); }
.form-message { padding: 1rem; border-radius: var(--radius); margin-bottom: 1rem; }
.form-message--success { background: rgba(0,168,232,.15); color: var(--color-primary); border: 1px solid var(--color-primary); }
.form-message--error { background: rgba(220,53,69,.15); color: #e66a6a; border: 1px solid #c94a4a; }

/* Responsive */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-photo { margin: 0 auto; }
}
@media (max-width: 768px) {
  .header-right { gap: .75rem; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-menu.is-open { display: flex; }
  .nav-toggle { display: block; }
  .social-links { display: flex; }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  .services-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .portfolio-grid { grid-template-columns: 1fr; }
  .section { padding: 2.5rem 1rem; }
}