/* ═════════════════════════════════════════════════════════════════
   GLASSMORPHIC PORTFOLIO — Dark & Light Theme
   Solid Black/White backgrounds, Modern scroll effects, 3D elements
   ═════════════════════════════════════════════════════════════════ */

:root {
  /* Dark theme (default) */
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --text-primary: #FFFFFF;
  --text-secondary: #B0BEC5;
  --text-muted: #808080;

  --accent-cyan: #06B6D4;
  --accent-blue: #0EA5E9;
  --accent-cyan-light: #14B8A6;

  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'Fira Code', monospace;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s ease;
}

/* Light theme */
body.light-theme {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F5;
  --text-primary: #000000;
  --text-secondary: #4a4a4a;
  --text-muted: #808080;

  --glass-bg: rgba(0, 0, 0, 0.05);
  --glass-border: rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ═══════════════════════════════════════════════════════════════
   ACCESSIBILITY
   ═══════════════════════════════════════════════════════════════ */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 3000;
  padding: 0.7rem 1.2rem;
  background: var(--accent-cyan);
  color: var(--bg-primary);
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ═══════════════════════════════════════════════════════════════
   GLASSMORPHISM UTILITY
   ═══════════════════════════════════════════════════════════════ */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
}

/* ═══════════════════════════════════════════════════════════════
   NAVBAR
   ═══════════════════════════════════════════════════════════════ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 2rem;
  transition: all 0.3s ease;
}

body.light-theme .navbar {
  background: rgba(255, 255, 255, 0.8);
}

.nav-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 2px;
}
.nav-logo span {
  color: var(--accent-cyan);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-lang {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.5rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
}
.lang-btn:hover,
.lang-btn.active {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  color: var(--bg-primary);
}

.nav-socials {
  display: flex;
  gap: 1rem;
  align-items: center;
}
.nav-socials a {
  color: var(--text-secondary);
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}
.nav-socials a:hover {
  color: var(--accent-cyan);
  transform: scale(1.2);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.2rem;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

/* ═══════════════════════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════════════════════ */
.hero {
  padding: 6rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-title .word {
  display: block;
  animation: slideInLeft 0.8s ease forwards;
}
.hero-title .word:nth-child(2) { animation-delay: 0.2s; }
.hero-title .word:nth-child(3) { animation-delay: 0.4s; }

.hero-title .highlight {
  background: linear-gradient(45deg, var(--accent-cyan), var(--accent-blue), var(--accent-cyan-light));
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-50px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 500px;
  line-height: 1.7;
  animation: fadeInUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.5s forwards;
  opacity: 0;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: var(--bg-primary);
  border: none;
  padding: 1rem 2.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.3);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(6, 182, 212, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-cyan);
  border: 2px solid var(--accent-cyan);
  padding: 1rem 2.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: var(--transition-fast);
}
.btn-secondary:hover {
  background: rgba(6, 182, 212, 0.1);
  transform: translateY(-3px);
}

/* ═══════════════════════════════════════════════════════════════
   CHATBOT UI
   ═══════════════════════════════════════════════════════════════ */
.chatbot-hero {
  padding: 1.5rem;
  max-height: 400px;
  display: flex;
  flex-direction: column;
}

.chatbot-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--glass-border);
}

.chatbot-header h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent-cyan);
}

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

.chatbot-messages {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 1rem;
  max-height: 250px;
}

.chat-msg {
  max-width: 85%;
  padding: 0.8rem 1rem;
  border-radius: 12px;
  font-size: 0.9rem;
  line-height: 1.5;
  animation: slideInUp 0.3s ease;
}

.chat-msg.bot {
  align-self: flex-start;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid var(--accent-cyan);
  color: var(--text-primary);
}

.chat-msg.user {
  align-self: flex-end;
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

@keyframes slideInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.chatbot-input {
  display: flex;
  gap: 0.5rem;
  border-top: 1px solid var(--glass-border);
  padding-top: 1rem;
}

.chatbot-input input {
  flex: 1;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.8rem;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.chatbot-input input:focus {
  border-color: var(--accent-cyan);
  outline: none;
}

.chatbot-input input::placeholder {
  color: var(--text-muted);
}

.chat-send {
  background: var(--accent-cyan);
  color: var(--bg-primary);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.2rem;
  transition: var(--transition-fast);
}

.chat-send:hover {
  background: var(--accent-blue);
  transform: scale(1.05);
}

/* ═══════════════════════════════════════════════════════════════
   PROFILE PHOTO
   ═══════════════════════════════════════════════════════════════ */
.hero-right {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.profile-photo {
  position: relative;
  width: 280px;
  height: 280px;
  margin: 0 auto;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 40px rgba(6, 182, 212, 0.3), 0 0 80px rgba(6, 182, 212, 0.15);
  transition: var(--transition);
}

.profile-photo:hover {
  transform: scale(1.03);
  box-shadow: 0 0 60px rgba(6, 182, 212, 0.5), 0 0 100px rgba(6, 182, 212, 0.25);
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (max-width: 768px) {
  .profile-photo {
    width: 200px;
    height: 200px;
  }
}

/* ═══════════════════════════════════════════════════════════════
   3D CUBE CANVAS
   ═══════════════════════════════════════════════════════════════ */
.cube-container {
  position: absolute;
  bottom: -100px;
  right: 0;
  width: 300px;
  height: 300px;
  opacity: 0.3;
  pointer-events: none;
}

#cube-canvas {
  width: 100%;
  height: 100%;
}

/* ═══════════════════════════════════════════════════════════════
   SECTION TITLE
   ═══════════════════════════════════════════════════════════════ */
.section-title {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  background: linear-gradient(45deg, var(--accent-cyan), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.light-theme .section-title {
  background: linear-gradient(45deg, #0077b6, #00a8e8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══════════════════════════════════════════════════════════════
   ABOUT SECTION
   ═══════════════════════════════════════════════════════════════ */
.about-section {
  padding: 6rem 2rem;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  max-width: 1400px;
  margin: 0 auto;
}

.about-container {
  max-width: 800px;
  margin: 0 auto;
}

.about-para {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.about-para:nth-of-type(1) { animation-delay: 0.1s; }
.about-para:nth-of-type(2) { animation-delay: 0.2s; }

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 3rem 0;
  animation: fadeInUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

.stat-box {
  text-align: center;
  padding: 2rem;
  border-radius: 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
}

.stat-box:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--accent-cyan);
  transform: translateY(-8px);
}

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

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.about-subheading {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.competencies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  animation: fadeInUp 0.8s ease 0.5s forwards;
  opacity: 0;
}

.competency-tag {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--accent-cyan);
  padding: 1rem;
  border-radius: 12px;
  text-align: center;
  font-weight: 500;
  transition: var(--transition-fast);
  cursor: default;
}

.competency-tag:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
}

/* ═══════════════════════════════════════════════════════════════
   FEATURED VIDEO SECTION
   ═══════════════════════════════════════════════════════════════ */
.video-feature {
  padding: 6rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.video-wrapper {
  padding: 3rem;
  position: relative;
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
}

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

.video-box {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(6, 182, 212, 0.25);
  aspect-ratio: 16 / 9;
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.showcase-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-overlay-gradient {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(14, 165, 233, 0.05));
  pointer-events: none;
}

.video-cta-section {
  animation: fadeInUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

.video-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.2;
}

.video-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.cta-button-large {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: var(--bg-primary);
  padding: 1.2rem 3rem;
  font-size: 1.2rem;
  font-weight: 700;
  border-radius: 16px;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 12px 40px rgba(6, 182, 212, 0.3);
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  margin-bottom: 2.5rem;
  display: inline-flex;
}

.cta-button-large:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 20px 50px rgba(6, 182, 212, 0.5);
}

.cta-button-large:active {
  transform: translateY(-2px) scale(0.98);
}

.button-text {
  font-weight: 700;
  letter-spacing: 0.5px;
}

.button-icon {
  font-size: 1.5rem;
  display: inline-block;
  transition: transform 0.3s ease;
}

.cta-button-large:hover .button-icon {
  transform: translateX(4px);
}

.video-benefits {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: 12px;
  background: rgba(6, 182, 212, 0.05);
  border: 1px solid rgba(6, 182, 212, 0.2);
  transition: all 0.3s ease;
}

.benefit-item:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--accent-cyan);
  transform: translateX(4px);
}

.benefit-icon {
  font-size: 1.8rem;
  min-width: 40px;
}

.benefit-text {
  font-weight: 600;
  color: var(--text-primary);
}

/* ═══════════════════════════════════════════════════════════════
   FEATURED PROJECTS
   ═══════════════════════════════════════════════════════════════ */
.projects-showcase {
  padding: 6rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.projects-grid-big {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 3rem;
}

.project-postcard-big {
  perspective: 1200px;
  animation: scaleInUp 0.8s ease forwards;
  opacity: 0;
}

.project-postcard-big:nth-child(1) { animation-delay: 0.1s; }
.project-postcard-big:nth-child(2) { animation-delay: 0.2s; }
.project-postcard-big:nth-child(3) { animation-delay: 0.3s; }
.project-postcard-big:nth-child(4) { animation-delay: 0.4s; }

@keyframes scaleInUp {
  from { opacity: 0; transform: scale(0.9) translateY(30px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.project-postcard-big:hover {
  transform: translateY(-20px) rotateX(5deg) scale(1.02);
}

.postcard-visual {
  width: 100%;
  height: 280px;
  border-radius: 16px 16px 0 0;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(6, 182, 212, 0.3);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.1); }
}

.photo-editor-bg { background: linear-gradient(135deg, #FF6B9D, #FEC8D8); }
.academia-bg { background: linear-gradient(135deg, #06B6D4, #0EA5E9); }
.video-editor-bg { background: linear-gradient(135deg, #8B5CF6, #A78BFA); }
.forte-bg { background: linear-gradient(135deg, #22C55E, #84CC16); }
.llamando-bg { background: linear-gradient(135deg, #F97316, #FBBF24); }

.postcard-content {
  padding: 2rem;
  border-radius: 0 0 16px 16px;
}

.project-badge {
  display: inline-block;
  background: rgba(6, 182, 212, 0.2);
  color: var(--accent-cyan);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.postcard-content h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 0.8rem;
}

.postcard-content p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.project-tech span {
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-cyan);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-link {
  display: inline-block;
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-fast);
  position: relative;
}

.project-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-cyan);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

.project-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ═══════════════════════════════════════════════════════════════
   SKILLS SECTION
   ═══════════════════════════════════════════════════════════════ */
.skills-section {
  padding: 4rem;
  max-width: 1400px;
  margin: 4rem auto;
  border: 1px solid var(--glass-border);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.skill-item {
  text-align: center;
  padding: 2rem;
  border-radius: 16px;
  background: rgba(6, 182, 212, 0.05);
  transition: var(--transition);
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.skill-item:nth-child(1) { animation-delay: 0.1s; }
.skill-item:nth-child(2) { animation-delay: 0.2s; }
.skill-item:nth-child(3) { animation-delay: 0.3s; }
.skill-item:nth-child(4) { animation-delay: 0.4s; }

.skill-item:hover {
  background: rgba(6, 182, 212, 0.15);
  transform: translateY(-8px);
  border: 1px solid var(--accent-cyan);
}

.skill-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.skill-item h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--accent-cyan);
}

.skill-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ═══════════════════════════════════════════════════════════════
   CONTACT SECTION
   ═══════════════════════════════════════════════════════════════ */
.contact-section {
  padding: 6rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.contact-card {
  padding: 2.5rem;
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.contact-card:nth-child(1) { animation-delay: 0.1s; }
.contact-card:nth-child(2) { animation-delay: 0.2s; }

.contact-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
}

.contact-card input,
.contact-card textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.8rem 1rem;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  transition: var(--transition-fast);
}

.contact-card input:focus,
.contact-card textarea:focus {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--accent-cyan);
  outline: none;
}

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

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #22C55E;
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1rem;
  font-weight: 600;
}

.contact-email {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

.contact-email a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-fast);
}

.contact-email a:hover {
  text-decoration: underline;
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════ */
.footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
  background: var(--bg-secondary);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1rem;
}

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

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

/* ═══════════════════════════════════════════════════════════════
   SCROLL REVEAL ANIMATIONS
   ═══════════════════════════════════════════════════════════════ */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-title {
    font-size: 3rem;
  }

  .video-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .video-title {
    font-size: 2rem;
  }

  .projects-grid-big {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 0.8rem 1rem;
  }

  .nav-wrapper {
    gap: 1rem;
  }

  .nav-logo {
    font-size: 1rem;
  }

  .nav-right {
    gap: 1rem;
  }

  .hero {
    padding: 4rem 1rem 3rem;
    min-height: auto;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    text-align: center;
  }

  .chatbot-hero {
    grid-column: 1 / -1;
  }

  .video-feature {
    padding: 3rem 1rem;
  }

  .video-wrapper {
    padding: 1.5rem;
  }

  .video-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .video-title {
    font-size: 1.8rem;
  }

  .video-subtitle {
    font-size: 1rem;
  }

  .cta-button-large {
    width: 100%;
    justify-content: center;
    padding: 1rem 2rem;
  }

  .video-benefits {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .benefit-item {
    padding: 0.8rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .projects-grid-big {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .postcard-visual {
    height: 220px;
  }

  .postcard-content {
    padding: 1.5rem;
  }

  .skills-section {
    padding: 2rem;
    margin: 2rem 1rem;
  }

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

  .about-stats {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .competencies-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer {
    padding: 2rem 1rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }

  .cube-container {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  .postcard-visual {
    height: 180px;
  }

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

  .nav-socials {
    gap: 0.5rem;
  }
}

/* ═════════════════════════════════════════════════════════════════
   ✨ STUNNING ADD-ON ELEMENTS (purely additive)
   ═════════════════════════════════════════════════════════════════ */

/* ── Scroll progress bar ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue), var(--accent-cyan-light));
  z-index: 2000;
  transition: width 0.1s linear;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.6);
}

/* ── Aurora background glow (drifting orbs) ── */
.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  will-change: transform;
}
.aurora-orb.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-cyan), transparent 70%);
  top: -120px;
  left: -100px;
  animation: drift1 18s ease-in-out infinite;
}
.aurora-orb.orb-2 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, var(--accent-blue), transparent 70%);
  bottom: -100px;
  right: -80px;
  animation: drift2 22s ease-in-out infinite;
}
.aurora-orb.orb-3 {
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, #8B5CF6, transparent 70%);
  top: 40%;
  left: 55%;
  animation: drift3 26s ease-in-out infinite;
}
/* Lighter, softer orbs in light theme so text stays crisp */
body.light-theme .aurora-orb { opacity: 0.18; }

@keyframes drift1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(120px, 80px) scale(1.15); }
}
@keyframes drift2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-100px, -60px) scale(1.1); }
}
@keyframes drift3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, 100px) scale(1.2); }
}

/* ── Cursor spotlight (desktop only) ── */
.cursor-spotlight {
  position: fixed;
  top: 0;
  left: 0;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12), transparent 65%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s ease;
  will-change: transform;
}

/* ── Scroll-down indicator (hero) ── */
.scroll-down {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-secondary);
  animation: bob 2s ease-in-out infinite;
}
.scroll-mouse {
  width: 26px;
  height: 42px;
  border: 2px solid var(--accent-cyan);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}
.scroll-wheel {
  width: 4px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 2px;
  animation: wheel 1.5s ease-in-out infinite;
}
.scroll-label {
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}
@keyframes bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}
@keyframes wheel {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ── Infinite tech marquee ── */
.marquee-section {
  overflow: hidden;
  padding: 1.5rem 0;
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 28s linear infinite;
}
.marquee-group {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-right: 2rem;
}
.marquee-group span {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.marquee-group span:nth-child(odd) {
  color: var(--accent-cyan);
}
.marquee-section:hover .marquee-track {
  animation-play-state: paused;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ── Shine sweep on project cards (premium glare) ── */
.project-postcard-big .postcard-visual::after {
  content: '';
  position: absolute;
  top: 0;
  left: -120%;
  width: 80%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
  pointer-events: none;
}
.project-postcard-big:hover .postcard-visual::after {
  left: 130%;
}

/* ── Animated glow border on the chatbot panel ── */
.chatbot-hero {
  position: relative;
}
.chatbot-hero::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 26px;
  padding: 2px;
  background: linear-gradient(130deg, var(--accent-cyan), transparent 40%, transparent 60%, var(--accent-blue));
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: borderGlow 6s ease infinite;
  pointer-events: none;
  z-index: -1;
}
@keyframes borderGlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ── Chatbot typing indicator ── */
.chat-msg.typing p {
  letter-spacing: 3px;
  animation: typingPulse 1s ease-in-out infinite;
}
@keyframes typingPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ── Back-to-top button ── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: var(--bg-primary);
  font-size: 1.4rem;
  font-weight: 700;
  cursor: pointer;
  z-index: 1500;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.35);
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 32px rgba(6, 182, 212, 0.55);
}

/* Hide heavy mouse-driven effects where they don't belong / reduced motion */
@media (max-width: 768px) {
  .cursor-spotlight { display: none; }
  .back-to-top { bottom: 1rem; right: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  .aurora-orb,
  .marquee-track,
  .scroll-down,
  .scroll-wheel,
  .chatbot-hero::before { animation: none !important; }
  .cursor-spotlight { display: none; }
}