/* ==========================================================================
   DAVID EJINDU | PERSONAL PORTFOLIO STYLES
   Minimalist Cyber-Dark Mode, Monospace Engineering Aesthetic, Pure CSS Modals
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --bg-dark: #050505;
  --bg-card: #0b0c0f;
  --bg-card-hover: #111217;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(16, 185, 129, 0.35);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #475569;
  
  /* Primary Accent: Cyber Emerald & Electric Cyan */
  --accent-primary: #10b981;      /* Neon Emerald */
  --accent-secondary: #06b6d4;    /* Cyber Cyan */
  --accent-primary-glow: rgba(16, 185, 129, 0.18);
  --accent-secondary-glow: rgba(6, 182, 212, 0.18);
  
  /* Tag Colors (Color Coordinated) */
  --color-wabtec: #ef4444;     /* Red */
  --color-stratus: #3b82f6;    /* Navy Blue */
  --color-i7: #38bdf8;         /* Light Blue */
  --color-facet: #eab308;      /* Yellow */
  --color-steelhacks: #f59e0b;  /* Amber Gold */
  --color-pitt: #eab308;        /* Pitt Gold / Yellow */
  
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', monospace;
  --font-sans: 'Plus Jakarta Sans', sans-serif;
  
  --max-width: 980px;
}

/* Reset & Base Settings */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(16, 185, 129, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 45%, rgba(6, 182, 212, 0.04) 0%, transparent 40%),
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  background-position: center top;
}

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

/* Utility Monospace Classes */
.mono {
  font-family: var(--font-mono);
}

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

/* Colored Highlight Chips */
.chip {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 3px 8px;
  border-radius: 4px;
  background-color: var(--accent-primary-glow);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.3);
  display: inline-block;
}

.chip.chip-gold {
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.3);
}

.chip.chip-green {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border-color: rgba(52, 211, 153, 0.3);
}

.chip.chip-cyan {
  background-color: rgba(6, 182, 212, 0.15);
  color: #22d3ee;
  border-color: rgba(34, 211, 238, 0.3);
}

/* Company Tag Colors */
.tag-wabtec { color: var(--color-wabtec); font-weight: 600; }
.tag-stratus { color: var(--color-stratus); font-weight: 600; }
.tag-i7 { color: var(--color-i7); font-weight: 600; }
.tag-facet { color: var(--color-facet); font-weight: 600; }
.tag-steelhacks { color: var(--color-steelhacks); font-weight: 600; }
.tag-pitt { color: var(--color-pitt); font-weight: 600; }

/* Hairline Dividers */
.divider-solid {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-color), transparent);
  margin: 48px 0;
  border: none;
}

.divider-dotted {
  height: 0;
  border: none;
  border-top: 1px dotted rgba(255, 255, 255, 0.15);
  margin: 56px 0;
}

/* ==========================================================================
   NAVBAR (Sticky Top)
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(8, 9, 12, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.nav-left {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-left:hover {
  color: var(--accent-primary);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--accent-primary);
}

.resume-btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
  padding: 6px 14px;
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s ease;
  background: transparent;
}

.resume-btn:hover {
  background-color: var(--accent-primary-glow);
  box-shadow: 0 0 16px var(--accent-primary-glow);
  transform: translateY(-1px);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding-top: 64px;
  padding-bottom: 20px;
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 48px;
  align-items: flex-start;
}

.terminal-prompt-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-secondary);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 16px;
}

/* Pure CSS Typewriter Title */
.typewriter-container {
  display: inline-block;
}

.typewriter-title {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  border-right: 12px solid var(--accent-primary);
  width: 0;
  animation: 
    typing 2.2s steps(12, end) forwards,
    blink-cursor 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-cursor {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent-primary); }
}

.hero-sublines {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-muted);
}

.hero-sublines p {
  line-height: 1.5;
}

.status-comments {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #64748b;
}

/* Headshot */
.hero-photo-wrapper {
  position: relative;
}

.hero-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center 20%;
  border-radius: 12px;
  border: 1px solid rgba(16, 185, 129, 0.3);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6), 0 0 20px rgba(16, 185, 129, 0.15);
  transition: all 0.3s ease;
}

.hero-photo:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7), 0 0 28px rgba(16, 185, 129, 0.3);
  transform: translateY(-2px);
}

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */
.section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 28px;
  letter-spacing: 0.05em;
}

.section-badge {
  background: var(--accent-primary-glow);
  color: var(--accent-primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.95rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  color: var(--text-main);
  text-transform: uppercase;
}

.section-header-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, rgba(16, 185, 129, 0.3), var(--border-color));
}

/* ==========================================================================
   SECTION 01: ABOUT
   ========================================================================== */
.about-content {
  display: flex;
  flex-direction: column;
  gap: 18px;
  color: #cbd5e1;
  font-size: 1.02rem;
  line-height: 1.75;
}

.about-content a {
  color: var(--text-main);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s ease;
}

.about-content a:hover {
  text-decoration-color: var(--accent-primary);
}

/* ==========================================================================
   SECTION 02: EXPERIENCE
   ========================================================================== */
.experience-list {
  display: flex;
  flex-direction: column;
  position: relative;
}

.experience-row {
  display: grid;
  grid-template-columns: 180px 1fr 140px;
  align-items: baseline;
  padding: 20px 16px;
  border-bottom: 1px solid var(--border-color);
  border-radius: 6px;
  transition: all 0.2s ease;
}

.experience-row:hover {
  background-color: var(--bg-card-hover);
  border-bottom-color: rgba(16, 185, 129, 0.25);
  transform: translateX(4px);
}

.exp-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.exp-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.exp-company {
  font-family: var(--font-mono);
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.company-logo-img {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  object-fit: contain;
  vertical-align: middle;
}

.exp-role {
  font-size: 0.92rem;
  color: #cbd5e1;
  font-weight: 500;
}

.exp-location {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: right;
}

.education-footnote {
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   SECTION 03: PROJECTS
   ========================================================================== */
.projects-intro {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.github-banner {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-primary);
  border-radius: 6px;
  padding: 20px 24px;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  transition: all 0.2s ease;
}

.github-banner:hover {
  border-color: var(--accent-primary);
  background-color: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.github-banner-title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

.github-banner-sub {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.github-arrow {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent-primary);
}

.projects-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-top: 2px solid var(--accent-primary);
  border-radius: 8px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 320px;
  transition: all 0.25 ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.project-card:hover {
  border-color: rgba(16, 185, 129, 0.4);
  border-top-color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5), 0 0 20px rgba(16, 185, 129, 0.1);
}

.project-info {
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.project-name {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.project-desc {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.6;
  margin-bottom: 20px;
}

.project-tech-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.project-links {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.project-link {
  color: var(--accent-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}

.project-link:hover {
  color: #34d399;
  text-decoration: underline;
}

.project-thumb-container {
  position: relative;
  overflow: hidden;
  background-color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
}

.project-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.project-thumb-container:hover .project-thumb {
  transform: scale(1.04);
  opacity: 1;
}

.play-badge {
  position: absolute;
  background-color: rgba(8, 9, 12, 0.88);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 8px 14px;
  border-radius: 20px;
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.project-thumb-container:hover .play-badge {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  box-shadow: 0 0 20px var(--accent-primary-glow);
}

/* ==========================================================================
   PURE CSS MODAL OVERLAY (:target)
   ========================================================================== */
.video-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(5, 6, 8, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.video-modal:target {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 900px;
  aspect-ratio: 16 / 9;
  background-color: #000;
  border-radius: 8px;
  border: 1px solid var(--border-active);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}

.modal-content iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.modal-close {
  position: absolute;
  top: -48px;
  right: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-muted);
  text-decoration: none;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.modal-close:hover {
  color: #fff;
  border-color: var(--accent-primary);
  background-color: var(--accent-primary);
}

/* ==========================================================================
   CERTIFICATIONS & VERIFICATION MODAL
   ========================================================================== */
.cert-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-secondary);
  border-radius: 8px;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  transition: all 0.2s ease;
}

.cert-card:hover {
  border-color: var(--accent-secondary);
  background-color: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.cert-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cert-title {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.cert-issuer {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.cert-badge-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
}

.cert-modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-active);
  border-radius: 12px;
  padding: 36px 40px;
  width: 90%;
  max-width: 540px;
  position: relative;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.8);
  font-family: var(--font-mono);
}

.cert-modal-header {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.cert-modal-body {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.cert-detail-row {
  display: flex;
  justify-content: space-between;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.cert-detail-label {
  color: var(--text-muted);
}

.cert-detail-val {
  color: var(--text-main);
  font-weight: 600;
}

/* ==========================================================================
   SECTION 04 / 05: CONTACT
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.contact-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 20px 18px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.contact-card:hover {
  border-color: var(--accent-primary);
  background-color: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.contact-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  word-break: break-all;
}

/* Footer */
.footer {
  margin-top: 64px;
  padding-bottom: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 860px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .hero-photo-wrapper {
    max-width: 220px;
  }
  
  .typewriter-title {
    font-size: 2.5rem;
  }
  
  .experience-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  
  .exp-location {
    text-align: left;
  }
  
  .project-card {
    grid-template-columns: 1fr;
  }
  
  .project-thumb-container {
    height: 220px;
  }
  
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 540px) {
  .nav-links {
    display: none;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .typewriter-title {
    font-size: 2.1rem;
  }
}