/* ============================================
   Personal Profile - Elegant Design System
   ============================================ */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&display=swap');

/* CSS Custom Properties */
:root {
  /* Colors */
  --color-accent: #f7c19e;
  --color-text: #d0d8e3;
  --color-background: #272b46;
  --color-header-bg: #8b838e;
  --color-header-text: #ffffff;
  --color-header-border: #f7c19e;
  
  /* Typography */
  --font-heading: 'Libre Baskerville', Georgia, serif;
  --font-body: 'EB Garamond', Garamond, serif;
  --size-heading-base: 34px;
  --size-body-base: 22px;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  
  /* Transitions */
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--size-body-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Texture */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    url('../images/starry.png'),
    radial-gradient(ellipse at 20% 30%, rgba(166, 134, 170, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(247, 193, 158, 0.06) 0%, transparent 50%);
  background-position: center, center, center;
  background-repeat: no-repeat, no-repeat, no-repeat;
  background-size: cover, cover, cover;  
  pointer-events: none;
  z-index: -1;
}

/* Selection */
::selection {
  background: var(--color-accent);
  color: var(--color-background);
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  background-color: var(--color-header-bg);
  border-bottom: 3px solid var(--color-header-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-header-text);
  text-decoration: none;
  letter-spacing: 0.02em;
  position: relative;
}

.site-logo::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-header-border);
  transition: width var(--transition-smooth);
}

.site-logo:hover::after {
  width: 100%;
}

/* Navigation */
.main-nav {
  display: flex;
  gap: var(--space-md);
}

.nav-link {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-header-text);
  text-decoration: none;
  padding: var(--space-xs) 0;
  position: relative;
  opacity: 0.9;
  transition: opacity var(--transition-smooth);
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-header-border);
  transition: all var(--transition-smooth);
  transform: translateX(-50%);
}

.nav-link:hover {
  opacity: 1;
}

.nav-link:hover::before,
.nav-link.active::before {
  width: 100%;
}

.nav-link.active {
  opacity: 1;
}

/* Mobile Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.nav-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-header-text);
  margin: 6px 0;
  transition: var(--transition-smooth);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.3;
  color: var(--color-text);
}

h1 {
  font-size: calc(var(--size-heading-base) * 1.8);
  margin-bottom: var(--space-md);
}

h2 {
  font-size: calc(var(--size-heading-base) * 1.3);
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: var(--size-heading-base);
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-sm);
}

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

a:hover {
  color: var(--color-header-text);
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

/* Page Header */
.page-header {
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
}

.page-header::after {
  content: '';
  display: block;
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin: var(--space-md) auto 0;
}

.page-title {
  font-size: calc(var(--size-heading-base) * 2);
  font-style: italic;
  color: var(--color-accent);
  animation: fadeInUp 0.8s ease-out;
}

.page-subtitle {
  font-size: calc(var(--size-body-base) * 1.2);
  opacity: 0.8;
  margin-top: var(--space-sm);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* ============================================
   Hero Section (Home Page)
   ============================================ */
.hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  padding: var(--space-xl) var(--space-md);
}

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

.hero-greeting {
  font-family: var(--font-body);
  font-size: var(--size-body-base);
  color: var(--color-accent);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 0.8s ease-out;
}

.hero-name {
  font-size: calc(var(--size-heading-base) * 2.5);
  font-style: italic;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-name .accent {
  color: var(--color-accent);
}

.hero-tagline {
  font-size: calc(var(--size-body-base) * 1.3);
  opacity: 0.85;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-cta {
  display: inline-flex;
  gap: var(--space-sm);
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

/* Decorative Elements */
.decorative-line {
  position: absolute;
  width: 1px;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--color-accent), transparent);
}

.decorative-line.left {
  left: 15%;
  top: 20%;
  animation: float 6s ease-in-out infinite;
}

.decorative-line.right {
  right: 15%;
  bottom: 20%;
  animation: float 6s ease-in-out infinite reverse;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: calc(var(--size-body-base) * 0.9);
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-accent);
  border-radius: 0;
  text-decoration: none;
  transition: all var(--transition-smooth);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  transition: left var(--transition-smooth);
  z-index: -1;
}

.btn:hover::before {
  left: 0;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-background);
}

.btn-primary:hover {
  color: var(--color-background);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
}

.btn-outline:hover {
  color: var(--color-background);
}

/* ============================================
   Cards & Content Blocks
   ============================================ */
.content-section {
  margin-bottom: var(--space-xl);
}

.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: var(--space-md);
}

.section-title::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--color-accent);
}

.card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(247, 193, 158, 0.15);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  transition: all var(--transition-smooth);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--color-accent);
  transition: height var(--transition-smooth);
}

.card:hover {
  background: rgba(255, 255, 255, 0.05);
  transform: translateX(5px);
}

.card:hover::before {
  height: 100%;
}

.card-title {
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.card-meta {
  font-size: calc(var(--size-body-base) * 0.85);
  opacity: 0.7;
  margin-bottom: var(--space-sm);
}

/* ============================================
   Skills Grid
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.skill-category {
  background: rgba(166, 134, 170, 0.08);
  padding: var(--space-md);
  border-left: 3px solid var(--color-accent);
}

.skill-category h3 {
  color: var(--color-accent);
  font-size: calc(var(--size-heading-base) * 0.8);
  margin-bottom: var(--space-sm);
}

.skill-list {
  list-style: none;
}

.skill-list li {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid rgba(208, 216, 227, 0.1);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.skill-list li::before {
  content: '◆';
  font-size: 0.5em;
  color: var(--color-accent);
}

/* ============================================
   Project Cards
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.project-card {
  background: linear-gradient(135deg, rgba(166, 134, 170, 0.1) 0%, rgba(247, 193, 158, 0.05) 100%);
  border: 1px solid rgba(247, 193, 158, 0.2);
  padding: var(--space-md);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.project-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(247, 193, 158, 0.1) 0%, transparent 70%);
  transform: translate(50%, -50%);
  transition: transform var(--transition-smooth);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-card:hover::after {
  transform: translate(30%, -30%);
}

.project-title {
  font-family: var(--font-heading);
  font-size: calc(var(--size-heading-base) * 0.9);
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.project-description {
  margin-bottom: var(--space-sm);
  opacity: 0.9;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  font-size: calc(var(--size-body-base) * 0.7);
  padding: 4px 12px;
  background: rgba(247, 193, 158, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(247, 193, 158, 0.3);
}

/* ============================================
   Timeline (Experience)
   ============================================ */
.timeline {
  position: relative;
  padding-left: var(--space-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-lg);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-lg) - 5px);
  top: 8px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--color-accent);
  background: var(--color-background);
  border-radius: 50%;
  transition: background var(--transition-smooth);
}

.timeline-item:hover::before {
  background: var(--color-accent);
}

.timeline-date {
  font-family: var(--font-body);
  font-size: calc(var(--size-body-base) * 0.85);
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.05em;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: calc(var(--size-heading-base) * 0.9);
  margin-bottom: var(--space-xs);
}

.timeline-company {
  font-style: italic;
  opacity: 0.8;
  margin-bottom: var(--space-sm);
}

/* ============================================
   Contact Form
   ============================================ */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.contact-info {
  padding: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.contact-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-form {
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(247, 193, 158, 0.15);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-size: calc(var(--size-body-base) * 0.9);
  margin-bottom: var(--space-xs);
  color: var(--color-accent);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--size-body-base);
  color: var(--color-text);
  background: rgba(39, 43, 70, 0.8);
  border: 1px solid rgba(247, 193, 158, 0.3);
  transition: all var(--transition-smooth);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(247, 193, 158, 0.1);
}

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

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: rgba(166, 134, 170, 0.1);
  border-top: 1px solid rgba(247, 193, 158, 0.2);
  padding: var(--space-lg) var(--space-md);
  margin-top: var(--space-xl);
}

.footer-content {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(247, 193, 158, 0.4);
  color: var(--color-accent);
  transition: all var(--transition-smooth);
}

.social-link:hover {
  background: var(--color-accent);
  color: var(--color-background);
  transform: translateY(-3px);
}

.copyright {
  font-size: calc(var(--size-body-base) * 0.8);
  opacity: 0.7;
}

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

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* Staggered animations for content */
.animate-in {
  animation: fadeInUp 0.6s ease-out both;
}

.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.2s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.4s; }
.animate-in:nth-child(5) { animation-delay: 0.5s; }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  :root {
    --size-heading-base: 28px;
    --size-body-base: 18px;
  }

  .header-container {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding-top: var(--space-sm);
  }

  .main-nav.active {
    display: flex;
  }

  .nav-link {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hero-name {
    font-size: calc(var(--size-heading-base) * 1.8);
  }

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

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .decorative-line {
    display: none;
  }
}

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

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

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