/* ============================================
   Francisco Olivares — Portfolio
   Design System & Global Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors - Dark Theme */
  --bg-primary: #06060b;
  --bg-secondary: #0c0c14;
  --bg-tertiary: #12121e;
  --bg-card: #161625;
  --bg-card-hover: #1a1a2e;
  --bg-glass: rgba(22, 22, 37, 0.7);

  /* Accent */
  --accent-primary: #00d4aa;
  --accent-secondary: #0ea5e9;
  --accent-gradient: linear-gradient(135deg, #00d4aa 0%, #0ea5e9 100%);
  --accent-gradient-text: linear-gradient(135deg, #00d4aa 0%, #0ea5e9 50%, #a855f7 100%);
  --accent-glow: 0 0 20px rgba(0, 212, 170, 0.3);
  --accent-glow-strong: 0 0 40px rgba(0, 212, 170, 0.4), 0 0 80px rgba(14, 165, 233, 0.2);

  /* Text */
  --text-primary: #e4e4ef;
  --text-secondary: #9898b0;
  --text-tertiary: #5e5e7a;
  --text-accent: #00d4aa;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(0, 212, 170, 0.3);

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Spacing */
  --section-padding: clamp(4rem, 10vh, 8rem);
  --container-max: 1200px;
  --container-padding: clamp(1.5rem, 4vw, 3rem);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* Selection */
::selection {
  background: rgba(0, 212, 170, 0.25);
  color: #fff;
}

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

p {
  color: var(--text-secondary);
  line-height: 1.8;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-secondary);
}

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

section {
  padding: var(--section-padding) 0;
  position: relative;
}

/* --- Section Header --- */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.section-label::before {
  content: '//';
  opacity: 0.5;
}

.section-title {
  margin-bottom: 1rem;
}

.section-title .gradient-text {
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- Background Effects --- */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.bg-gradient-orb {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

.bg-gradient-orb--1 {
  top: -200px;
  right: -200px;
  background: var(--accent-primary);
}

.bg-gradient-orb--2 {
  bottom: 30%;
  left: -300px;
  background: var(--accent-secondary);
}

.bg-gradient-orb--3 {
  bottom: -200px;
  right: 20%;
  background: #a855f7;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all var(--transition-base);
  backdrop-filter: blur(0px);
}

.nav.scrolled {
  padding: 0.6rem 0;
  background: rgba(6, 6, 11, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

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

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

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

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav__link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-base);
  border-radius: 1px;
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__cta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  transition: all var(--transition-base);
}

.nav__cta:hover {
  background: rgba(0, 212, 170, 0.1);
  box-shadow: var(--accent-glow);
  color: var(--accent-primary);
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: 50px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease both;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 212, 170, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(0, 212, 170, 0); }
}

.hero__title {
  font-size: clamp(2.8rem, 7vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero__title-line {
  display: block;
}

.hero__title .gradient-text {
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__terminal {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.5rem;
  margin-bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero__terminal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent-gradient);
  opacity: 0.5;
}

.hero__terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 0.8rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--border-subtle);
}

.hero__terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.hero__terminal-dot--red { background: #ff5f57; }
.hero__terminal-dot--yellow { background: #febc2e; }
.hero__terminal-dot--green { background: #28c840; }

.hero__terminal-title {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.hero__terminal-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.hero__terminal-prompt {
  color: var(--accent-primary);
  user-select: none;
}

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

.hero__terminal-output {
  color: var(--text-secondary);
  padding-left: 1.5rem;
}

.hero__terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--accent-primary);
  animation: cursor-blink 1s step-end infinite;
  vertical-align: text-bottom;
}

@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero__description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 580px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  text-decoration: none;
}

.btn--primary {
  background: var(--accent-gradient);
  color: var(--bg-primary);
  font-weight: 600;
}

.btn--primary:hover {
  box-shadow: var(--accent-glow-strong);
  transform: translateY(-2px);
  color: var(--bg-primary);
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--border-light);
  color: var(--text-primary);
}

.btn--outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.05);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-tertiary);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  animation: float 3s ease-in-out infinite;
}

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

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-10px); }
}

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

/* Particle canvas */
.hero__particles {
  position: absolute;
  inset: 0;
  z-index: 1;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about__visual {
  position: relative;
}

.about__card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.about__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.about__avatar-area {
  text-align: center;
  margin-bottom: 2rem;
}

.about__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: 800;
  color: var(--bg-primary);
  margin: 0 auto 1rem;
  position: relative;
}

.about__avatar::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--accent-primary);
  opacity: 0.3;
  animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.05); opacity: 0.1; }
}

.about__name {
  font-size: 1.3rem;
  margin-bottom: 0.3rem;
}

.about__role {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-primary);
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.about__stat {
  text-align: center;
  padding: 1rem 0.5rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.about__stat-number {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.about__stat-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.2rem;
}

.about__text h3 {
  margin-bottom: 1.2rem;
}

.about__text p {
  margin-bottom: 1rem;
  font-size: 1rem;
}

.about__info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.about__info-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
}

.about__info-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 170, 0.08);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-size: 0.85rem;
  flex-shrink: 0;
}

.about__info-label {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.about__info-value {
  color: var(--text-primary);
  font-size: 0.9rem;
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.experience__timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.experience__timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary), transparent);
}

.experience__item {
  position: relative;
  padding-left: 3rem;
  padding-bottom: 3rem;
}

.experience__item:last-child {
  padding-bottom: 0;
}

.experience__dot {
  position: absolute;
  left: -6px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-primary);
  z-index: 2;
  transition: all var(--transition-base);
}

.experience__item:hover .experience__dot {
  background: var(--accent-primary);
  box-shadow: 0 0 12px rgba(0, 212, 170, 0.5);
}

.experience__card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  transition: all var(--transition-base);
}

.experience__card:hover {
  border-color: var(--border-accent);
  transform: translateX(4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.experience__date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.experience__position {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.experience__company {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.experience__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.experience__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.65rem;
  background: rgba(0, 212, 170, 0.06);
  border: 1px solid rgba(0, 212, 170, 0.15);
  border-radius: 50px;
  color: var(--accent-primary);
}

.experience__description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.experience__description ul {
  list-style: none;
  padding: 0;
}

.experience__description li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.4rem;
}

.experience__description li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.skills__category {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  transition: all var(--transition-base);
}

.skills__category:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.skills__category-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.skills__category-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
}

.skill__item {
  margin-bottom: 1rem;
}

.skill__item:last-child {
  margin-bottom: 0;
}

.skill__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
}

.skill__name {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.skill__level {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
}

.skill__bar {
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 2px;
  overflow: hidden;
}

.skill__bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 2px;
  width: 0;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill__bar-fill.animated {
  /* width set via data attribute */
}

/* Tech tags variant */
.skills__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skills__tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.8rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skills__tag:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.05);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
}

.project__card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project__card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.project__card:hover::before {
  opacity: 1;
}

.project__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.project__icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 170, 0.08);
  border-radius: var(--radius-md);
  font-size: 1.2rem;
  color: var(--accent-primary);
}

.project__links {
  display: flex;
  gap: 0.5rem;
}

.project__link {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.project__link:hover {
  color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.08);
}

.project__name {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.project__description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.15);
  border-radius: 50px;
  color: var(--accent-secondary);
}

/* Featured project */
.project__featured {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  position: relative;
  overflow: hidden;
}

.project__featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

/* Enhanced hero featured variant */
.project__featured--hero {
  background: linear-gradient(135deg, rgba(22, 22, 37, 0.95) 0%, rgba(6, 6, 11, 0.98) 100%);
  border: 1px solid rgba(0, 212, 170, 0.2);
  padding: 3rem;
}

.project__featured--hero::before {
  height: 4px;
  background: linear-gradient(90deg, #00d4aa 0%, #0ea5e9 50%, #a855f7 100%);
}

.project__featured--hero:hover {
  border-color: rgba(0, 212, 170, 0.35);
  box-shadow: 0 0 60px rgba(0, 212, 170, 0.08), 0 20px 60px rgba(0, 0, 0, 0.4);
}

.project__featured-glow {
  position: absolute;
  top: -150px;
  right: -150px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.project__featured-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.project__featured-actions {
  display: flex;
  gap: 0.6rem;
  flex-shrink: 0;
}

.btn--sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.8rem;
}

.project__featured-role {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

.project__featured-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.project__featured-stat {
  text-align: center;
}

.project__featured-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.project__featured-stat-label {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project__featured-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: 50px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.project__featured-title {
  font-size: 2rem;
  margin-bottom: 0.6rem;
  background: var(--accent-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.project__featured-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.project__featured-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.project__featured-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.project__featured-feature-icon {
  color: var(--accent-primary);
  margin-top: 0.15rem;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .project__featured-header {
    flex-direction: column;
    gap: 1rem;
  }
  .project__featured-actions {
    width: 100%;
  }
  .project__featured-actions .btn {
    flex: 1;
    justify-content: center;
  }
  .project__featured-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .project__featured--hero {
    padding: 2rem;
  }
}

/* ============================================
   CERTIFICATIONS SECTION
   ============================================ */
.certifications {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.certifications__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.cert__card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all var(--transition-base);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.cert__card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.cert__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  flex-shrink: 0;
}

.cert__info {
  flex-grow: 1;
}

.cert__name {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  line-height: 1.3;
}

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

.cert__year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-primary);
  margin-top: 0.3rem;
}

/* ============================================
   EDUCATION SECTION
   ============================================ */
.education__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.education__card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.education__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent-gradient);
}

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

.education__year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  margin-bottom: 0.6rem;
}

.education__degree {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  line-height: 1.3;
}

.education__school {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.education__detail {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: 0.4rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 900px;
  margin: 0 auto;
}

.contact__text p {
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.contact__methods {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact__method {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-decoration: none;
}

.contact__method:hover {
  border-color: var(--border-accent);
  transform: translateX(4px);
}

.contact__method-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 170, 0.08);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-size: 1rem;
  flex-shrink: 0;
}

.contact__method-label {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.contact__method-value {
  color: var(--text-primary);
  font-size: 0.9rem;
}

.contact__socials {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.contact__social {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition-base);
  text-decoration: none;
}

.contact__social:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: rgba(0, 212, 170, 0.08);
  transform: translateY(-2px);
}

/* Contact form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form__label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.form__input,
.form__textarea {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
  outline: none;
}

.form__input:focus,
.form__textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.footer__built {
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

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

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.15s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.25s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.3s; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 0.35s; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 0.4s; }
.stagger-children.visible > *:nth-child(9) { transition-delay: 0.45s; }
.stagger-children.visible > *:nth-child(10) { transition-delay: 0.5s; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   FADE IN UP ANIMATION
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 968px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 1.5rem;
    transition: right var(--transition-base);
    z-index: 999;
  }

  .nav__links.open {
    right: 0;
  }

  .nav__toggle {
    display: flex;
    z-index: 1001;
  }

  .nav__cta {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .experience__timeline::before {
    left: 0;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 3.5rem);
  }
}

@media (max-width: 640px) {
  .about__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.6rem;
  }

  .about__info-grid {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .certifications__grid {
    grid-template-columns: 1fr;
  }

  .education__grid {
    grid-template-columns: 1fr;
  }

  .footer__content {
    flex-direction: column;
    gap: 0.5rem;
  }

  .skills__grid {
    grid-template-columns: 1fr;
  }

  .project__featured-features {
    grid-template-columns: 1fr;
  }
}

/* Mobile overlay */
.nav__overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
}

.nav__overlay.open {
  display: block;
}

/* --- Language badge --- */
.lang-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  background: rgba(168, 85, 247, 0.1);
  border: 1px solid rgba(168, 85, 247, 0.2);
  color: #a855f7;
  margin-left: 0.3rem;
  vertical-align: middle;
}

/* --- Separator --- */
.section-separator {
  width: 100%;
  height: 1px;
  background: var(--border-subtle);
}