/* ===== CSS Variables (Light Theme) ===== */
:root {
  --bg-primary: #f8f9fc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #555770;
  --text-muted: #8b8da3;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-bg: rgba(108, 92, 231, 0.08);
  --border: rgba(0, 0, 0, 0.06);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1100px;
}

/* ===== Dark Theme ===== */
[data-theme="dark"] {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #1e1e35;
  --text-primary: #e8e8f0;
  --text-secondary: #b0b0c8;
  --text-muted: #7a7a9a;
  --accent: #a29bfe;
  --accent-light: #6c5ce7;
  --accent-bg: rgba(162, 155, 254, 0.1);
  --border: rgba(255, 255, 255, 0.06);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
}

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

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

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

a {
  text-decoration: none;
  color: inherit;
}

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

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

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  background: rgba(248, 249, 252, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border var(--transition);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 15, 26, 0.85);
}

.nav-logo {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  background: var(--accent-bg);
  border: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: background var(--transition), transform 0.2s;
}

.theme-toggle:hover {
  transform: scale(1.08);
}

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

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

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 120px 40px 60px;
  position: relative;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  width: 100%;
  gap: 60px;
}

.hero-text {
  flex: 1;
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.hero-name {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-typewriter {
  font-size: 1.15rem;
  color: var(--text-secondary);
  min-height: 28px;
  margin-bottom: 36px;
  border-right: 2px solid var(--accent);
  display: inline-block;
  padding-right: 4px;
  animation: blink-caret 0.75s step-end infinite;
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent); }
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(108, 92, 231, 0.4);
}

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

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

.hero-image {
  flex-shrink: 0;
}

.hero-image-placeholder {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-bg), rgba(108, 92, 231, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  border: 3px solid var(--accent-bg);
  position: relative;
  animation: float 6s ease-in-out infinite;
}

.hero-image-placeholder::before {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 2px dashed var(--accent-bg);
  animation: spin 30s linear infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

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

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

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

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

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 56px;
  letter-spacing: -0.5px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  margin: 12px auto 0;
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 1.02rem;
}

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

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

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

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-sm);
}

.skill-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-light);
}

.skill-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  background: var(--accent-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
  transition: background var(--transition);
}

.skill-card:hover .skill-icon {
  background: var(--accent);
  color: #fff;
}

.skill-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.skill-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

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

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
}

.project-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--shadow-lg);
}

.project-image {
  height: 180px;
  background: linear-gradient(135deg, var(--accent-bg) 0%, rgba(108, 92, 231, 0.18) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: background var(--transition);
}

.project-card:hover .project-image {
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.15) 0%, rgba(108, 92, 231, 0.28) 100%);
}

.project-info {
  padding: 28px;
}

.project-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  background: var(--accent-bg);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.project-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

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

/* ===== FOOTER ===== */
.footer {
  padding: 80px 0 40px;
  text-align: center;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.footer-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.footer-email {
  display: inline-block;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 32px;
  transition: opacity var(--transition);
}

.footer-email:hover {
  opacity: 0.75;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 40px;
}

.social-links a {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: all var(--transition);
}

.social-links a:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(108, 92, 231, 0.3);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .about-stats {
    flex-direction: row;
    justify-content: center;
  }

  .stat-card {
    flex: 1;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 14px 20px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    transition: right var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }

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

  .nav-links a {
    font-size: 1.1rem;
  }

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

  .hero {
    padding: 100px 20px 60px;
  }

  .hero-content {
    flex-direction: column-reverse;
    text-align: center;
    gap: 40px;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-image-placeholder {
    width: 200px;
    height: 200px;
  }

  .hero-typewriter {
    display: block;
    text-align: center;
  }

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

  .section {
    padding: 70px 0;
  }

  .section-title {
    font-size: 1.6rem;
    margin-bottom: 40px;
  }
}

@media (max-width: 500px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    flex-direction: column;
  }

  .hero-name {
    font-size: 2.4rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.85rem;
  }
}