/* =============================================
   DESIGN SYSTEM — Martín Zapana Portfolio
   ============================================= */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --bg-primary: #0a0a1a;
  --bg-secondary: #0f0f2a;
  --bg-tertiary: #141432;
  --bg-card: rgba(20, 20, 50, 0.6);

  --text-primary: #e8e8f0;
  --text-secondary: #a0a0c0;
  --text-muted: #6a6a8a;

  --accent-cyan: #00d4ff;
  --accent-violet: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-green: #10b981;

  --gradient-primary: linear-gradient(
    135deg,
    var(--accent-cyan),
    var(--accent-violet)
  );
  --gradient-home: linear-gradient(
    135deg,
    #00d4ff 0%,
    #8b5cf6 50%,
    #ec4899 100%
  );
  --gradient-card: linear-gradient(
    135deg,
    rgba(0, 212, 255, 0.1),
    rgba(139, 92, 246, 0.1)
  );
  --gradient-subtle: linear-gradient(
    135deg,
    rgba(0, 212, 255, 0.05),
    rgba(139, 92, 246, 0.05)
  );

  --glass-bg: rgba(15, 15, 42, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 50%;

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  --text-xs: clamp(0.75rem, 0.7rem + 0.15vw, 0.8rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.2vw, 0.9rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --text-lg: clamp(1.1rem, 1rem + 0.3vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  --text-3xl: clamp(2rem, 1.5rem + 1.5vw, 3rem);
  --text-4xl: clamp(2.5rem, 2rem + 2vw, 4rem);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Z-index */
  --z-canvas: -1;
  --z-content: 1;
  --z-nav: 100;
  --z-overlay: 200;

  /* Navbar height */
  --nav-height: 70px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--accent-violet);
}

img {
  max-width: 100%;
  display: block;
}

::selection {
  background: rgba(0, 212, 255, 0.3);
  color: #fff;
}

/* ---------- Canvas Background ---------- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-canvas);
  pointer-events: none;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ---------- Section ---------- */
.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--space-3xl);
  letter-spacing: -0.02em;
}

.section-number {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--accent-cyan);
  margin-right: var(--space-sm);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-top: calc(var(--space-3xl) * -1 + var(--space-lg));
  margin-bottom: var(--space-3xl);
  text-align: center;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: var(--z-nav);
  transition: all var(--transition-base);
  backdrop-filter: blur(0px);
}

.navbar.scrolled {
  background: rgba(10, 10, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 2px;
  transition: all var(--transition-base);
}

.nav-logo:hover {
  color: var(--accent-cyan);
}

.logo-bracket {
  color: var(--accent-cyan);
  font-weight: 400;
}

.nav-menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 60%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: var(--z-overlay);
}

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

.nav-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.5px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-transform: uppercase;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 2px solid var(--accent-cyan);
}

.btn-outline:hover {
  background: rgba(0, 212, 255, 0.1);
  transform: translateY(-2px);
  color: var(--accent-cyan);
}

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

/* ---------- home Section ---------- */
.home-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl)
    var(--space-xl);
  position: relative;
}

.home-content {
  max-width: 800px;
}

.home-greeting {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--accent-cyan);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

.home-name {
  font-size: var(--text-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-home);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.home-title-wrapper {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  min-height: 40px;
}

.home-title-prefix {
  color: var(--accent-cyan);
  font-weight: 700;
}

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

.typing-cursor {
  color: var(--accent-cyan);
  font-weight: 300;
}

.home-description {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.8;
}

.home-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.home-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3xl);
}

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

.stat-number {
  display: block;
  font-size: var(--text-3xl);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.stat-plus {
  font-size: var(--text-2xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: var(--space-xs);
  display: block;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.scroll-mouse {
  width: 26px;
  height: 40px;
  border: 2px solid var(--text-muted);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-wheel {
  width: 4px;
  height: 10px;
  background: var(--accent-cyan);
  border-radius: 2px;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: rgba(0, 212, 255, 0.2);
  box-shadow:
    0 8px 40px rgba(0, 0, 0, 0.4),
    0 0 20px rgba(0, 212, 255, 0.05);
  transform: translateY(-4px);
}

/* ---------- About Section ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.image-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 20px;
  padding: 3px;
  background: linear-gradient(
    135deg,
    var(--accent-cyan),
    var(--accent-purple),
    var(--accent-cyan)
  );
  background-size: 200% 200%;
  animation: gradient-border 4s ease infinite;
  box-shadow:
    0 0 25px rgba(0, 212, 255, 0.15),
    0 0 50px rgba(0, 212, 255, 0.05);
  transition: all 0.4s ease;
}

@keyframes gradient-border {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.image-frame:hover {
  box-shadow:
    0 0 35px rgba(0, 212, 255, 0.25),
    0 0 70px rgba(0, 212, 255, 0.1);
  transform: translateY(-4px);
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: 18px;
  display: block;
  filter: grayscale(15%) contrast(1.05);
  transition: filter 0.4s ease;
}

.image-frame:hover .profile-photo {
  filter: grayscale(0%) contrast(1.1);
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  font-size: var(--text-base);
  line-height: 1.9;
}

.about-badges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.badge-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 12px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
  cursor: default;
}

.badge-icon {
  font-size: 24px;
  line-height: 1;
}

.badge-label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  letter-spacing: 0.3px;
  line-height: 1.3;
}

.badge-card:hover {
  background: rgba(0, 212, 255, 0.06);
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 212, 255, 0.1);
}

.badge-card:hover .badge-label {
  color: var(--accent-cyan);
}

@media (max-width: 480px) {
  .about-badges {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Skills Section ---------- */
.skills-category {
  margin-bottom: var(--space-3xl);
}

.skills-category:last-child {
  margin-bottom: 0;
}

.skills-category-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  text-align: center;
  position: relative;
}

.skills-category-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--gradient-primary);
  margin: var(--space-sm) auto 0;
  border-radius: 2px;
}

.skills-icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.skill-icon-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
  cursor: default;
}

.skill-icon-card i {
  font-size: 40px;
  line-height: 1;
}

/* GitHub icon is black — invert for dark bg */
.skill-icon-card .icon-invert {
  filter: invert(1);
}

/* Professional monochrome styling for colorful AI/Tech logos */
.skill-icon-card .tech-icon-mono {
  filter: grayscale(100%) brightness(1.5);
  opacity: 0.85;
  transition: all 0.3s ease;
}

.skill-icon-card:hover .tech-icon-mono {
  filter: grayscale(0%) brightness(1);
  opacity: 1;
}

.skill-icon-card span {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  letter-spacing: 0.3px;
}

.skill-icon-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.1);
}

.skill-icon-card:hover span {
  color: var(--text-primary);
}

/* ---------- Projects Section ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-xl);
  min-height: 200px;
}

.project-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover {
  border-color: rgba(0, 212, 255, 0.2);
  transform: translateY(-6px);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.4),
    0 0 30px rgba(0, 212, 255, 0.05);
}

.project-card:hover::before {
  opacity: 1;
}

.project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.project-folder {
  color: var(--accent-cyan);
}

.project-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.project-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.project-links a:hover {
  color: var(--accent-cyan);
}

.project-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.project-card:hover h3 {
  color: var(--accent-cyan);
}

.project-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: var(--space-lg);
}

.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.project-lang {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.project-stars {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* Projects loader */
.projects-loader {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-3xl);
  color: var(--text-muted);
}

.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.projects-cta {
  text-align: center;
  margin-top: var(--space-2xl);
}

/* ---------- Education Section ---------- */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--accent-cyan),
    var(--accent-violet),
    transparent
  );
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-2xl);
}

.timeline-marker {
  position: absolute;
  left: -46px;
  top: var(--space-xl);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
  border: 2px solid var(--bg-primary);
}

.timeline-content {
  padding: var(--space-xl);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-cyan);
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.timeline-content h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: var(--space-sm) 0 var(--space-xs);
}

.timeline-content > p:nth-of-type(1) {
  font-size: var(--text-sm);
  color: var(--accent-violet);
  font-weight: 500;
}

.timeline-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-sm);
  line-height: 1.7;
}

/* ---------- Contact Section ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  transition: all var(--transition-base);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-card {
  text-align: center;
}

.contact-card h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.contact-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.social-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
}

.social-link {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-base);
}

.social-link:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2);
}

.contact-decoration {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg) 0;
}

.deco-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--glass-border),
    transparent
  );
}

.deco-circle {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 2px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.footer-copy {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 10, 26, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    transition: right var(--transition-base);
    border-left: 1px solid var(--glass-border);
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-link {
    font-size: var(--text-base);
  }

  .home-stats {
    gap: var(--space-xl);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .about-image {
    max-width: 220px;
    margin: 0 auto;
  }

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

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

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

  .section {
    padding: var(--space-3xl) 0;
  }

  .container {
    padding: 0 var(--space-lg);
  }
}

@media (max-width: 480px) {
  .home-cta {
    flex-direction: column;
    width: 100%;
  }

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

  .home-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }

  .stat-number,
  .stat-plus {
    font-size: var(--text-2xl);
  }

  .stat-label {
    margin-top: 0;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline-marker {
    left: -36px;
  }

  .timeline-content {
    padding: var(--space-lg);
  }
}