/* ===== CSS Custom Properties ===== */
:root {
  --color-bg: #0a0a0b;
  --color-bg-alt: #111114;
  --color-surface: #1a1a1f;
  --color-surface-hover: #222228;
  --color-border: #2a2a32;
  --color-text: #e8e8ed;
  --color-text-secondary: #9898a6;
  --color-text-muted: #6b6b7b;
  --color-accent: #6c63ff;
  --color-accent-light: #8b83ff;
  --color-accent-glow: rgba(108, 99, 255, 0.15);
  --color-gradient-start: #6c63ff;
  --color-gradient-end: #e040fb;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1100px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

::selection {
  background: var(--color-accent);
  color: #fff;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.accent {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
  border-radius: 1px;
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  padding: 8px 20px !important;
  border-radius: var(--radius-full);
  color: #fff !important;
  font-weight: 600 !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.shape-1 {
  width: 500px;
  height: 500px;
  background: var(--color-accent);
  top: -150px;
  right: -100px;
  opacity: 0.12;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: var(--color-gradient-end);
  bottom: -100px;
  left: -100px;
  opacity: 0.08;
}

.shape-3 {
  width: 300px;
  height: 300px;
  background: #00d4ff;
  top: 40%;
  left: 50%;
  opacity: 0.06;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 100px;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--color-accent-light);
  margin-bottom: 16px;
  font-weight: 400;
}

.hero-name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-tagline {
  font-size: 1.3rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-bottom: 16px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 80px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108, 99, 255, 0.4);
}

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

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

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

/* ===== Scroll Indicator ===== */
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.hero-scroll:hover {
  color: var(--color-accent-light);
}

.hero-scroll-text {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 500;
}

.hero-scroll-arrows {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-top: -2px;
}

.hero-scroll-arrows svg:nth-child(1) {
  animation: bounceArrow 1.6s ease-in-out infinite;
}

.hero-scroll-arrows svg:nth-child(2) {
  margin-top: -10px;
  animation: bounceArrow 1.6s ease-in-out 0.15s infinite;
  opacity: 0.4;
}

@keyframes bounceArrow {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50%      { transform: translateY(6px); opacity: 1; }
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 60px;
  text-align: center;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
  border-radius: 2px;
  margin: 16px auto 0;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 60px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  width: 250px;
  height: 250px;
  margin: 0 auto;
}

.about-avatar {
  width: 250px;
  height: 250px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: var(--color-accent);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.about-image-border {
  position: absolute;
  inset: -8px;
  border-radius: calc(var(--radius-lg) + 4px);
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  z-index: 0;
  opacity: 0.3;
}

.about-intro {
  font-size: 1.2rem;
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 16px;
}

.about-text p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.skill-category {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
}

.skill-category:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), 0 0 30px var(--color-accent-glow);
}

.skill-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--color-accent-light);
  margin-bottom: 20px;
}

.skill-category h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: var(--transition);
}

.skill-category:hover .skill-tag {
  border-color: rgba(108, 99, 255, 0.3);
}

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

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}

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

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-accent);
  z-index: 1;
}

.timeline-item:first-child .timeline-marker {
  background: var(--color-accent);
  box-shadow: 0 0 0 6px var(--color-accent-glow);
}

.timeline-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
}

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

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4px;
  gap: 12px;
}

.timeline-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent-light);
  white-space: nowrap;
  flex-shrink: 0;
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  font-weight: 500;
}

.timeline-content p:last-child {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.project-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), 0 0 40px var(--color-accent-glow);
}

.project-image {
  height: 200px;
  background: linear-gradient(135deg, var(--color-surface), var(--color-bg-alt));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-placeholder {
  font-size: 3.5rem;
  color: var(--color-accent);
  opacity: 0.5;
  transition: var(--transition);
}

.project-card:hover .project-placeholder {
  opacity: 0.8;
  transform: scale(1.1);
}

.project-info {
  padding: 24px;
}

.project-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.project-info p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.project-tech span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--color-accent-glow);
  color: var(--color-accent-light);
  border-radius: var(--radius-full);
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 20px;
}

.project-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

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

/* ===== Contact ===== */
.contact-wrapper {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.contact-intro {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
  display: block;
}

.contact-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm), 0 0 20px var(--color-accent-glow);
}

.contact-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-accent-light);
  margin: 0 auto 14px;
}

.contact-card h4 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.contact-card p {
  font-size: 0.9rem;
  color: var(--color-text);
  font-weight: 500;
}

.form-status {
  margin-top: 16px;
  font-size: 0.9rem;
  font-weight: 500;
  min-height: 24px;
}

.form-status.success {
  color: #00e676;
}

.form-status.error {
  color: #ff5252;
}

.btn.loading {
  opacity: 0.7;
  pointer-events: none;
}

.contact-form {
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

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

.contact-social {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
}

.social-link {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  transition: var(--transition);
}

.social-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
  transform: translateY(-3px);
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

/* ===== Certifications ===== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), 0 0 30px var(--color-accent-glow);
}

.cert-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--color-accent-light);
  margin: 0 auto 20px;
}

.cert-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cert-issuer {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.cert-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cert-link:hover {
  color: var(--color-gradient-end);
}

/* ===== Footer ===== */
.footer {
  padding: 32px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

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

.footer p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-location {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== Animations ===== */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }
.delay-5 { animation-delay: 0.75s; }

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

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

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

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-surface);
    flex-direction: column;
    padding: 80px 32px 32px;
    gap: 24px;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
  }

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .about-stats {
    justify-content: center;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .timeline-header {
    flex-direction: column;
  }

  .section {
    padding: 70px 0;
  }

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

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

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

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

  .footer-content {
    flex-direction: column;
    gap: 8px;
  }
}