/* ============================================
   ABINASH NAYAK | BACKEND PORTFOLIO
   Dark terminal aesthetic · Cyan accent
   ============================================ */

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary:    #0a0a12;
  --bg-secondary:  #0f0f1a;
  --bg-card:       #12121f;
  --bg-card-hover: #16162a;
  --bg-snippet:    #0d0d1a;

  --cyan:          #00d4ff;
  --cyan-dim:      rgba(0, 212, 255, 0.15);
  --cyan-glow:     rgba(0, 212, 255, 0.08);
  --green:         #00ff88;
  --amber:         #ffb347;

  --text-primary:  #e8e8f0;
  --text-secondary:#8888aa;
  --text-muted:    #555570;

  --border:        rgba(0, 212, 255, 0.12);
  --border-hover:  rgba(0, 212, 255, 0.35);

  --font-sans:     'Inter', system-ui, sans-serif;
  --font-mono:     'Fira Mono', 'Cascadia Code', monospace;

  --radius:        8px;
  --radius-lg:     14px;
  --transition:    0.22s ease;
  --shadow-card:   0 4px 32px rgba(0,0,0,0.5), 0 1px 0 rgba(0,212,255,0.06);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

/* subtle scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ── LAYOUT ── */
.container-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* ── HEADER / NAV ── */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 10, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  user-select: none;
}
.logo-text  { color: var(--text-primary); }
.logo-accent { color: var(--cyan); }

.nav-menu {
  display: flex;
  gap: 4px;
  list-style: none;
}
.nav-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  letter-spacing: 0.04em;
}
.nav-link:hover {
  color: var(--cyan);
  border-color: var(--border);
  background: var(--cyan-glow);
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 80px;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(0,212,255,0.05) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 10% 80%, rgba(0,255,136,0.03) 0%, transparent 60%),
    var(--bg-primary);
}

.hero .container-main {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 60px;
  align-items: center;
}

.hero-title {
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 40%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 28px;
  line-height: 1.7;
}

.hero-tech-brands {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}
.tech-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid rgba(0,212,255,0.25);
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.06em;
}

/* CTA buttons */
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 10px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.cta-button .icon { width: 16px; height: 16px; flex-shrink: 0; }

.cta-button.primary {
  background: var(--cyan);
  color: #050510;
  font-weight: 700;
}
.cta-button.primary:hover {
  background: #33ddff;
  box-shadow: 0 0 24px rgba(0,212,255,0.4);
  transform: translateY(-1px);
}

.cta-button.secondary {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.cta-button.secondary:hover {
  color: var(--cyan);
  border-color: var(--border-hover);
  background: var(--cyan-glow);
  transform: translateY(-1px);
}

/* Code snippet */
.hero-accent {
  display: flex;
  justify-content: center;
}
.code-snippet {
  background: var(--bg-snippet);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-card), 0 0 60px rgba(0,212,255,0.06);
  animation: floatSnippet 6s ease-in-out infinite;
}
@keyframes floatSnippet {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

.snippet-header {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  background: rgba(0,212,255,0.05);
  border-bottom: 1px solid var(--border);
  gap: 8px;
}
.snippet-header::before {
  content: '';
  display: flex;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #ff5f57;
  box-shadow: 18px 0 0 #febc2e, 36px 0 0 #28c840;
}
.snippet-lang {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
  letter-spacing: 0.06em;
}

.code-snippet pre {
  padding: 20px 20px 24px;
  overflow: auto;
}
.code-snippet code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-secondary);
  white-space: pre;
  display: block;
}

/* ── SECTION BASE ── */
section { padding: 100px 0; }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* ── PROJECTS ── */
.projects { background: var(--bg-secondary); }

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), 0 0 40px rgba(0,212,255,0.08);
}
.project-card:hover::before { opacity: 1; }

.project-status { margin-bottom: -8px; }
.status-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
}
.status-badge.active  { background: rgba(0,255,136,0.12); color: var(--green); border: 1px solid rgba(0,255,136,0.25); }
.status-badge.mature  { background: rgba(0,212,255,0.12); color: var(--cyan);  border: 1px solid rgba(0,212,255,0.25); }

.project-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.project-subtitle {
  font-size: 13px;
  color: var(--cyan);
  font-family: var(--font-mono);
  margin-top: -12px;
}
.project-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.highlights-title, .tech-title, .deployment-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}
.highlights-list { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.highlights-list li {
  display: flex;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  align-items: flex-start;
}
.highlight-icon {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  flex-shrink: 0;
  margin-top: 2px;
}

.tech-items { display: flex; flex-wrap: wrap; gap: 7px; }
.tech-item {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 4px;
  transition: color var(--transition), border-color var(--transition);
}
.tech-item:hover { color: var(--cyan); border-color: rgba(0,212,255,0.3); }

.deployment-info {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.project-links {
  display: flex;
  gap: 12px;
  margin-top: auto;
  padding-top: 4px;
}
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.project-link .icon { width: 14px; height: 14px; }
.project-link:hover {
  color: var(--cyan);
  border-color: var(--border-hover);
  background: var(--cyan-glow);
}

/* ── APPROACH / ARCHITECTURE ── */
.architecture {
  background:
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(0,212,255,0.04) 0%, transparent 70%),
    var(--bg-primary);
}

.architecture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.architecture-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
}
.architecture-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.arch-icon {
  width: 40px; height: 40px;
  background: var(--cyan-dim);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.arch-icon svg {
  width: 20px; height: 20px;
  stroke: var(--cyan);
}

.architecture-item h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.architecture-item p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── TECH STACK ── */
.tech-stack { background: var(--bg-secondary); }

.stack-categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.stack-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.category-title {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cyan);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.stack-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.stack-list li { display: flex; flex-direction: column; gap: 2px; }
.stack-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}
.stack-desc {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── CONTACT ── */
.contact {
  background:
    radial-gradient(ellipse 50% 50% at 50% 100%, rgba(0,212,255,0.06) 0%, transparent 60%),
    var(--bg-primary);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: all var(--transition);
}
.contact-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,212,255,0.1);
}
.contact-icon {
  width: 48px; height: 48px;
  background: var(--cyan-dim);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-icon svg {
  width: 22px; height: 22px;
  fill: var(--cyan);
  stroke: none;
}
.contact-icon svg[stroke="currentColor"] {
  fill: none;
  stroke: var(--cyan);
}
.contact-card h3 {
  font-size: 16px;
  font-weight: 700;
}
.contact-card p {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}
.contact-cta {
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}
.contact-cta p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── FOOTER ── */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
}
.footer p {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

/* ── ANIMATIONS / SCROLL REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .architecture-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-categories   { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero .container-main {
    grid-template-columns: 1fr;
  }
  .hero-accent { display: none; }
  .projects-grid { grid-template-columns: 1fr; }
  .architecture-grid { grid-template-columns: 1fr 1fr; }
  .stack-categories   { grid-template-columns: 1fr; }
  .contact-grid       { grid-template-columns: 1fr; }

  .nav-menu { display: none; }
  section { padding: 72px 0; }
}

@media (max-width: 480px) {
  .architecture-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 38px; }
}