/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@300;400;500;700&display=swap');

:root {
  /* Colors */
  --bg: #0A0A0A;
  --surface: #111111;
  --surface-hover: #161616;
  --border: #1E1E1E;
  --border-hover: #2E2E2E;
  --text-primary: #E8E8E8;
  --text-secondary: #8E8E8E;
  --accent: #4ADE80;
  --accent-dim: rgba(74, 222, 128, 0.08);
  --accent-glow: rgba(74, 222, 128, 0.25);
  
  /* Fonts */
  --font-display: 'JetBrains Mono', monospace;
  --font-body: 'Inter', sans-serif;
  
  /* Layout */
  --content-max-width: 1100px;
  --nav-height: 70px;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--border) var(--bg);
  background-color: var(--bg);
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* Selection */
::selection {
  background-color: var(--accent-dim);
  color: var(--accent);
}

/* ==========================================================================
   REUSABLE UTILITIES
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0;
  border-bottom: 1px solid var(--border);
}

.section-eyebrow {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
  display: block;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 4rem;
  color: var(--text-primary);
}

.section-title span {
  font-family: var(--font-display);
  color: var(--accent);
}

/* Link utilities */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Button styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 1.6rem;
  background-color: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 1.5rem;
  width: fit-content;
}

.btn:hover {
  background-color: var(--accent-dim);
  box-shadow: 0 0 15px var(--accent-glow);
  transform: translateY(-2px);
}

.btn svg {
  transition: transform 0.3s ease;
}

.btn:hover svg {
  transform: translateY(2px);
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background-color 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  background-color: rgba(10, 10, 10, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

#nav.nav--solid {
  background-color: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.05em;
}

.nav-logo span {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

#nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

#nav ul li a {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  opacity: 0.85;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

#nav ul li a:hover,
#nav ul li a.active {
  color: var(--accent);
  opacity: 1;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
#hero {
  position: relative;
  width: 100%;
  height: 100svh;
  overflow: hidden;
  background-color: var(--bg);
  padding: 0;
  border-bottom: 1px solid var(--border);
}

#hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

#hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-end;
  padding: 6rem 4rem;
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.9) 0%,
    rgba(10, 10, 10, 0.4) 50%,
    transparent 100%
  );
  text-align: left;
}

.hero-content {
  width: 100%;
  max-width: 500px;
}

.hero-content .eyebrow {
  font-family: var(--font-display);
  font-size: clamp(0.8rem, 1.5vw, 1rem);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
}

.hero-content h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-content h1 span.cursor {
  font-family: var(--font-display);
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

.hero-content .tagline {
  font-family: var(--font-display);
  font-size: clamp(0.9rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  word-spacing: 0.1em;
}

/* Blinking Cursor Keyframes */
@keyframes blink {
  from, to { opacity: 1 }
  50% { opacity: 0 }
}

/* Scroll Down Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  opacity: 0.6;
  transition: opacity 0.3s;
}

.scroll-indicator:hover {
  opacity: 1;
}

.scroll-indicator::after {
  content: '';
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-line 2s infinite ease-in-out;
}

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  50.1% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 6rem;
  align-items: start;
}

.about-text p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.about-text p:first-of-type {
  color: var(--text-primary);
  font-size: 1.25rem;
  line-height: 1.6;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.stat-tile {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  border-radius: 8px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.stat-tile:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

.skills-category {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 2.5rem 2rem;
  border-radius: 8px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.skills-category:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.skills-category h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
  font-weight: 500;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.badge {
  font-family: var(--font-display);
  font-size: 0.75rem;
  padding: 0.4rem 0.8rem;
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.badge:hover {
  border-color: var(--accent);
  background-color: var(--accent-dim);
  color: var(--accent);
}

/* ==========================================================================
   EXPERIENCE SECTION (TIMELINE)
   ========================================================================== */
.timeline {
  position: relative;
  border-left: 1px solid var(--border);
  margin-left: 1.5rem;
  padding-left: 3rem;
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -3.375rem; /* center on the border line */
  top: 0.5rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--bg);
  border: 2px solid var(--accent);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  z-index: 2;
}

.timeline-item:hover::before {
  background-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.timeline-header {
  margin-bottom: 1.5rem;
}

.timeline-date {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}

.timeline-role {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.timeline-company {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.timeline-details {
  list-style: none;
}

.timeline-details li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.timeline-details li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-display);
}

.timeline-group {
  margin-bottom: 2rem;
}

.timeline-group:last-child {
  margin-bottom: 0;
}

.timeline-subheading {
  font-family: var(--font-display);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 3rem 2.5rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: border-color 0.3s ease, transform 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.project-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background-color: var(--accent);
  transition: height 0.3s ease;
}

.project-card:hover::after {
  height: 100%;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.card-number {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 700;
  opacity: 0.5;
}

.card-stack {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--accent);
  text-align: right;
  letter-spacing: -0.02em;
}

.project-card h3 {
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.project-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.card-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  width: fit-content;
}

.project-card:hover .card-link {
  color: var(--accent);
}

/* ==========================================================================
   ACHIEVEMENTS SECTION
   ========================================================================== */
.achievement-category-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin: 3rem 0 1.5rem;
  letter-spacing: -0.01em;
}

.achievement-category-title:first-of-type {
  margin-top: 2rem;
}

.achievements-container {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.achievement-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  padding: 2.5rem;
  border-bottom: 1px solid var(--border);
  align-items: start;
  transition: background-color 0.25s ease;
}

.achievement-row:last-child {
  border-bottom: none;
}

.achievement-row:hover {
  background-color: rgba(255, 255, 255, 0.01);
}

.achievement-sport {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.achievement-sport span.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.achievement-details {
  list-style: none;
}

.achievement-details li {
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.achievement-details li:last-child {
  margin-bottom: 0;
}

.achievement-details li strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* ==========================================================================
   BEYOND THE CODE SECTION
   ========================================================================== */
.beyond-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.beyond-category {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 3rem;
  border-radius: 8px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.beyond-category:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.beyond-category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.25rem;
}

.beyond-category-header h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text-primary);
  margin: 0;
}

.beyond-category-header .icon {
  color: var(--accent);
  display: flex;
  align-items: center;
}

.beyond-items {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.beyond-item h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.beyond-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ==========================================================================
   RECOMMENDATIONS SECTION
   ========================================================================== */
.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.recommendation-card {
  position: relative;
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 3.5rem 3rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.recommendation-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
}

/* Accent dot at the top center on hover */
.recommendation-card::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 50%;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 3;
}

.recommendation-card:hover::before {
  transform: translateX(-50%) scale(1);
  box-shadow: 0 0 10px var(--accent-glow);
}

.rec-quote {
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.6;
  color: var(--text-secondary);
  opacity: 0.95;
  margin-bottom: 2rem;
  font-weight: 400;
  position: relative;
}

.rec-info {
  margin-top: auto;
}

.rec-name {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.rec-profession {
  font-family: var(--font-display);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0;
  font-weight: 500;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
#contact {
  padding-bottom: 4rem;
  border-bottom: none;
}

.contact-wrap {
  text-align: center;
  padding: 2rem 0;
}

.contact-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.contact-title span {
  font-family: var(--font-display);
  color: var(--accent);
}

.contact-subtitle {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 4rem;
  font-size: 1.1rem;
}

.contact-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 3rem;
  margin-bottom: 5rem;
}

.contact-link-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.contact-link-item .icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.contact-link-item:hover .icon {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 15px var(--accent-glow);
  transform: translateY(-2px);
}

.contact-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
}

.contact-value {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  background-color: var(--bg);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.footer-credit a:hover {
  color: var(--accent);
}

/* ==========================================================================
   ACCESSIBILITY & REDUCED MOTION
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    transition: none !important;
    animation: none !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-indicator::after {
    animation: none !important;
  }
  .hero-content h1 span.cursor {
    animation: none !important;
  }
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .beyond-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  
  .achievement-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .achievement-sport {
    margin-bottom: 0.5rem;
  }
  
  section {
    padding: 6rem 0;
  }
}

@media (max-width: 768px) {
  #hero-video {
    display: none !important;
  }
  #hero {
    background-image: url('assets/hero-poster-mobile.jpg');
    background-size: cover;
    background-position: center;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 1.5rem;
  }
  
  #nav ul {
    display: none; /* simple mobile fallback: hide links, focus on visual flow */
  }
  
  #hero-overlay {
    align-items: center;
    text-align: center;
    padding: 4rem 1.5rem;
  }
  
  .hero-content {
    max-width: 100%;
    padding-bottom: 2rem;
  }
  
  .timeline {
    margin-left: 0.5rem;
    padding-left: 1.5rem;
    gap: 3rem;
  }
  
  .timeline-item::before {
    left: -1.875rem;
  }
  
  .project-card {
    padding: 2rem 1.5rem;
  }
  
  .beyond-category {
    padding: 2.5rem 2rem;
  }
  
  .achievement-row {
    padding: 1.5rem;
  }
  
  .contact-grid {
    flex-direction: column;
    gap: 2rem;
    align-items: center;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}