/* ===== CSS Variables ===== */
:root {
  --bg-primary: #0d0d0d;
  --bg-secondary: #000000;
  --text-primary: #ffffff;
  --text-secondary: #86868b;
  --accent: #007AFF;
  --glass: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.1);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== Navigation ===== */
.glass-nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 12px 32px;
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  z-index: 1000;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px;
}

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

.hero-content {
  text-align: center;
  z-index: 1;
}

.hero-title {
  font-size: clamp(4rem, 15vw, 12rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  opacity: 0.8;
}

.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,122,255,0.15) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

/* ===== Section Common ===== */
section {
  padding: 120px 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 600;
  margin-bottom: 60px;
  text-align: center;
}

/* ===== About Section - Bento Grid ===== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 32px;
  transition: var(--transition);
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.2);
}

/* Profile Card */
.profile-image {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 16px;
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-card h3 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.profile-title {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.profile-bio {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Expertise Card */
.expertise-card h3,
.services-card h3 {
  font-size: 1.2rem;
  margin-bottom: 24px;
}

.skill-item {
  margin-bottom: 16px;
}

.skill-item span {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.skill-bar {
  height: 4px;
  background: var(--glass-border);
  border-radius: 2px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0;
  transition: width 1s ease;
}

/* Services Card */
.service-list {
  list-style: none;
}

.service-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--glass-border);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.service-list li:last-child {
  border-bottom: none;
}

/* ===== How I Work Section ===== */
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.workflow-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  transition: var(--transition);
}

.workflow-card:hover {
  transform: translateY(-4px);
}

.workflow-icon {
  width: 60px;
  height: 60px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
}

.workflow-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

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

/* ===== Works Section ===== */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.project-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
}

.project-card:hover {
  transform: scale(1.02);
  border-color: rgba(255,255,255,0.2);
}

.project-image {
  width: 100%;
  height: 240px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-info {
  padding: 24px;
}

.project-info h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.project-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0,122,255,0.2);
  color: var(--accent);
  font-size: 0.75rem;
  border-radius: 20px;
}

/* ===== Services Section ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.service-card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ===== Contact Section ===== */
.contact {
  text-align: center;
}

.contact-subtitle {
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.contact-form {
  max-width: 500px;
  margin: 0 auto 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 16px 20px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

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

.submit-btn {
  padding: 16px 32px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,122,255,0.3);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 24px;
}

.social-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 60px 5%;
  border-top: 1px solid var(--glass-border);
}

.footer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.copyright {
  font-size: 0.8rem;
  opacity: 0.6;
}

/* ===== Scroll Animation ===== */
.bento-card,
.workflow-card,
.project-card,
.service-card {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.bento-card.animate-in,
.workflow-card.animate-in,
.project-card.animate-in,
.service-card.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .glass-nav {
    padding: 12px 20px;
    gap: 20px;
  }
  
  .nav-links {
    gap: 16px;
  }
  
  .nav-links a {
    font-size: 0.8rem;
  }
  
  .bento-grid,
  .workflow-grid,
  .project-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  section {
    padding: 80px 5%;
  }
}