/* ============================================
   Kristian Hans Onjala — Portfolio
   Dark theme with radial gradient + animated orbs
   ============================================ */

:root {
  --color-bg: #0a0f1a;
  --color-bg-alt: #0d1321;
  --color-surface: rgba(13, 19, 33, 0.7);
  --color-surface-elevated: rgba(20, 30, 50, 0.8);
  --color-primary: #3b82f6;
  --color-primary-glow: rgba(59, 130, 246, 0.3);
  --color-accent-gold: #f59e0b;
  --color-accent-red: #ef4444;
  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-border: rgba(148, 163, 184, 0.12);
  --color-border-glow: rgba(59, 130, 246, 0.2);
  --color-white: #ffffff;

  --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.1);
  --transition-base: 200ms ease;
  --transition-smooth: 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --container-max: 1100px;
  --container-padding: 1.5rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* Animated orbs background */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  z-index: -1;
  animation: orb-drift 20s ease-in-out infinite;
}
body::before {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 70%);
  top: -200px;
  right: -150px;
}
body::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15), transparent 70%);
  bottom: 20%;
  left: -200px;
  animation-delay: -10s;
  animation-duration: 25s;
}

@keyframes orb-drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -20px) scale(1.05); }
  50% { transform: translate(-20px, 30px) scale(0.95); }
  75% { transform: translate(15px, 15px) scale(1.02); }
}

/* Third orb via a positioned div */
.orb-extra {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.2), transparent 70%);
  filter: blur(80px);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
  animation: orb-drift 30s ease-in-out infinite reverse;
  pointer-events: none;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-base); }
a:hover { color: var(--color-accent-gold); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

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

/* ============ Navigation ============ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 15, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.5px;
}
.nav-logo span { color: var(--color-primary); }

.nav-links {
  display: flex;
  gap: 2rem;
}
.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition-base);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-smooth);
}
.nav-links a:hover { color: var(--color-white); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--color-white); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition-smooth);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 998;
}
.mobile-overlay.active { display: block; }

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -280px;
  width: 280px;
  height: 100vh;
  background: var(--color-bg-alt);
  border-left: 1px solid var(--color-border);
  padding: 5rem 2rem 2rem;
  z-index: 999;
  transition: right var(--transition-smooth);
  flex-direction: column;
  gap: 1.5rem;
}
.mobile-menu.active { right: 0; }
.mobile-menu a {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  font-weight: 500;
}
.mobile-menu a:hover { color: var(--color-white); }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: flex; }
}

/* ============ Sections ============ */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-divider {
  width: 100%;
  height: 80px;
  position: relative;
  overflow: hidden;
}
.section-divider svg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.section-heading {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 0.5rem;
  letter-spacing: -0.5px;
}

.section-subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: 3rem;
  max-width: 600px;
}

/* ============ Hero ============ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 5rem;
  position: relative;
}

.hero-content {
  max-width: 750px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1.5rem;
}
.eyebrow .line {
  width: 40px;
  height: 2px;
  background: var(--color-primary);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--color-white) 30%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h1 .accent {
  -webkit-text-fill-color: var(--color-primary);
}

/* Typing animation */
.typing-role {
  display: inline-block;
  font-size: 1.125rem;
  color: var(--color-primary);
  font-weight: 600;
  border-right: 2px solid var(--color-primary);
  padding-right: 4px;
  animation: blink-caret 0.75s step-end infinite;
  white-space: nowrap;
  overflow: hidden;
  margin-bottom: 1.5rem;
}
@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--color-primary); }
}

.hero .intro {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 620px;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.hero-stat .number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-white);
}
.hero-stat .label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-decoration: none;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover {
  background: #2563eb;
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.chevron {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
  animation: bounce-down 2s ease-in-out infinite;
}
@keyframes bounce-down {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 1; }
  50% { transform: rotate(45deg) translateY(6px); opacity: 0.5; }
}

/* ============ About ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
}

.about-text p {
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.credentials-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.credentials-list li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.credentials-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill-pill {
  padding: 0.4rem 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: all var(--transition-smooth);
}
.skill-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.05);
}

.quote-box {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.quote-box p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
  line-height: 1.7;
}

/* ============ Projects ============ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
@media (max-width: 768px) {
  .projects-grid { grid-template-columns: 1fr; }
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-gold));
  opacity: 0;
  transition: opacity var(--transition-smooth);
}
.project-card:hover {
  border-color: var(--color-border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.project-card:hover::before { opacity: 1; }

.project-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}
.project-card .summary {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.project-card .stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}
.project-card .stack span {
  padding: 0.25rem 0.6rem;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--color-primary);
  font-weight: 500;
}
.project-card .link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-smooth), color var(--transition-base);
}
.project-card .link:hover {
  gap: 0.7rem;
  color: var(--color-accent-gold);
}
.project-card .link svg {
  width: 16px;
  height: 16px;
}

/* Featured project card (first one spans full width) */
.project-card.featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}
.project-card.featured .project-meta {
  display: flex;
  flex-direction: column;
}
@media (max-width: 768px) {
  .project-card.featured { grid-template-columns: 1fr; }
}

/* ============ Timeline ============ */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-border), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
  padding-left: 1.5rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-primary);
  transition: all var(--transition-smooth);
}
.timeline-item:hover::before {
  background: var(--color-primary);
  box-shadow: 0 0 12px var(--color-primary-glow);
}

.timeline-item .period {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.3rem;
}
.timeline-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.2rem;
}
.timeline-item .org {
  font-size: 0.9rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.timeline-item .desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============ Endorsements ============ */
.endorsements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.endorsement-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(8px);
  transition: all var(--transition-smooth);
}
.endorsement-card:hover {
  border-color: var(--color-border-glow);
  transform: translateY(-2px);
}

.endorsement-card blockquote {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-style: italic;
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 1rem;
  border-left: 2px solid var(--color-primary);
}

.endorsement-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.endorsement-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-white);
  flex-shrink: 0;
}
.endorsement-author .name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-white);
}
.endorsement-author .role {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ============ Contact ============ */
.section-dark {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 0.4rem;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: all var(--transition-smooth);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.contact-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1.5rem;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  transition: color var(--transition-base);
}
.contact-link:hover { color: var(--color-primary); }
.contact-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ============ Footer ============ */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}
.site-footer p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ============ Scroll Reveal ============ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* Stagger for skill pills */
.skill-pill {
  opacity: 0;
  transform: translateY(10px) scale(0.9);
  transition: all 0.3s ease;
}
.skill-pill.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ============ Angled section dividers ============ */
.angled-divider {
  position: relative;
  height: 80px;
  overflow: hidden;
}
.angled-divider::before {
  content: '';
  position: absolute;
  top: 0;
  left: -5%;
  width: 110%;
  height: 100%;
  background: var(--color-bg);
  transform: skewY(-2deg);
  transform-origin: top left;
}
.angled-divider.reverse::before {
  transform: skewY(2deg);
  transform-origin: top right;
}
.angled-divider.alt::before {
  background: var(--color-bg-alt);
}

/* ============ Responsive ============ */
@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .hero-stats {
    gap: 1.5rem;
  }
  .hero-stat .number {
    font-size: 1.5rem;
  }
  .section {
    padding: 4rem 0;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .skill-pill { opacity: 1; transform: none; }
}