/* ============================================
   Jenny Wu - Resume Website
   Professional & Elegant Design
   ============================================ */

/* ===== GOOGLE FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+TC:wght@300;400;500;700&family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors - Primary */
  --color-primary: #2D3748;
  --color-primary-light: #4A5568;
  --color-primary-dark: #1A202C;

  /* Colors - Accent (Coral) */
  --color-accent: #E8927C;
  --color-accent-light: #F5B7A5;
  --color-accent-dark: #D4725A;
  --color-accent-rgb: 232, 146, 124;

  /* Colors - Background */
  --color-bg-primary: #FAFAFA;
  --color-bg-secondary: #FFFFFF;
  --color-bg-accent: #FFF5F2;
  --color-bg-dark: #2D3748;

  /* Colors - Text */
  --color-text-heading: #1A202C;
  --color-text-body: #4A5568;
  --color-text-muted: #718096;
  --color-text-light: #A0AEC0;
  --color-text-inverse: #FFFFFF;

  /* Colors - Border & Shadow */
  --color-border: #E2E8F0;
  --color-border-light: #EDF2F7;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font Sizes - Fluid */
  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.25vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.4vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 0.7vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.8rem + 1.5vw, 3.5rem);
  --text-5xl: clamp(3rem, 2.2rem + 2.5vw, 5rem);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --nav-height: 80px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-Index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-loader: 9999;
}

/* ===== CSS RESET ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-body);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-heading);
  line-height: 1.2;
  font-weight: 600;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

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

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

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

.section-title {
  font-size: var(--text-3xl);
  text-align: center;
  margin-bottom: var(--space-lg);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  margin: var(--space-md) auto 0;
  border-radius: var(--radius-full);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

/* ===== PAGE LOADER ===== */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg-secondary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  z-index: var(--z-loader);
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.loaded {
  opacity: 0;
  visibility: hidden;
}

.loader-logo {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  letter-spacing: 0.1em;
}

.loader-dots {
  display: flex;
  gap: 8px;
}

.loader-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: dotPulse 1.4s infinite ease-in-out both;
}

.loader-dots span:nth-child(1) { animation-delay: -0.32s; }
.loader-dots span:nth-child(2) { animation-delay: -0.16s; }
.loader-dots span:nth-child(3) { animation-delay: 0s; }

@keyframes dotPulse {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: var(--z-fixed);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.navbar.is-scrolled {
  box-shadow: var(--shadow-md);
}

.navbar.is-hidden {
  transform: translateY(-100%);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

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

/* Mobile Menu Toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  padding: 4px;
  z-index: 10;
}

.nav-toggle span {
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Navigation Menu */
.nav-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-bg-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  transform: translateX(100%);
  transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-menu.is-open {
  transform: translateX(0);
}

.nav-link {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-body);
  padding: var(--space-sm) var(--space-md);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base), left var(--transition-base);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-accent);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
  left: 0;
}

/* Desktop Navigation */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    flex-direction: row;
    gap: var(--space-sm);
    transform: none;
  }

  .nav-link {
    font-size: var(--text-sm);
    padding: var(--space-sm) var(--space-md);
  }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 15px rgba(var(--color-accent-rgb), 0.3);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--color-accent-rgb), 0.4);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}

/* Ripple Effect */
.btn .ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ===== HERO SECTION ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--space-3xl)) var(--space-lg) var(--space-3xl);
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-accent) 100%);
  position: relative;
  overflow: hidden;
}

/* Decorative Elements */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 140%;
  background: linear-gradient(135deg, rgba(var(--color-accent-rgb), 0.05) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 50%;
  height: 80%;
  background: linear-gradient(45deg, rgba(var(--color-accent-rgb), 0.03) 0%, transparent 50%);
  border-radius: 50%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__greeting {
  font-size: var(--text-lg);
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: var(--space-sm);
  min-height: 1.2em;
}

.hero__title-cn {
  font-family: var(--font-body);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hero__description {
  font-size: var(--text-xl);
  color: var(--color-text-body);
  margin-bottom: var(--space-2xl);
  line-height: 1.8;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

/* Typewriter Cursor */
.typewriter::after {
  content: '|';
  color: var(--color-accent);
  animation: blink 0.8s infinite;
  font-weight: 300;
}

.typewriter-done::after {
  display: none;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Scroll Indicator */
.hero__scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.scroll-arrow {
  width: 24px;
  height: 40px;
  border: 2px solid currentColor;
  border-radius: 12px;
  position: relative;
}

.scroll-arrow::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  background: currentColor;
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {
  0% { opacity: 1; top: 8px; }
  100% { opacity: 0; top: 20px; }
}

/* ===== ABOUT SECTION ===== */
.about {
  background: var(--color-bg-secondary);
}

.about__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (min-width: 768px) {
  .about__content {
    grid-template-columns: 1fr 1.2fr;
  }
}

.about__image-wrapper {
  position: relative;
  max-width: 350px;
  margin: 0 auto;
}

.about__image-wrapper::before {
  content: '';
  position: absolute;
  top: var(--space-lg);
  left: var(--space-lg);
  width: 100%;
  height: 100%;
  border: 3px solid var(--color-accent);
  border-radius: var(--radius-lg);
  z-index: 0;
  transition: all var(--transition-base);
}

.about__image-wrapper:hover::before {
  top: var(--space-md);
  left: var(--space-md);
}

.about__image {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about__image img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-slow);
}

.about__image:hover img {
  transform: scale(1.05);
}

.about__text h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-lg);
  color: var(--color-text-heading);
}

.about__text p {
  color: var(--color-text-body);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

/* Trait Tags */
.about__traits {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.trait-tag {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-accent);
  color: var(--color-accent-dark);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.trait-tag:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}

/* ===== EXPERIENCE SECTION ===== */
.experience {
  background: var(--color-bg-primary);
}

.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 8px;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-light));
  border-radius: var(--radius-full);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-3xl);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: calc(-1 * var(--space-xl) + 1px);
  top: 0;
  width: 16px;
  height: 16px;
  background: var(--color-bg-secondary);
  border: 3px solid var(--color-accent);
  border-radius: 50%;
  z-index: 1;
  transition: all var(--transition-base);
}

.timeline__item:hover .timeline__marker {
  background: var(--color-accent);
  transform: scale(1.2);
}

.timeline__content {
  background: var(--color-bg-secondary);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.timeline__item:hover .timeline__content {
  transform: translateX(10px);
  box-shadow: var(--shadow-lg);
}

.timeline__date {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-bg-accent);
  color: var(--color-accent-dark);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.timeline__title {
  font-size: var(--text-xl);
  font-family: var(--font-body);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text-heading);
}

.timeline__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.timeline__description {
  color: var(--color-text-body);
  margin-bottom: var(--space-md);
}

.timeline__list {
  padding-left: var(--space-lg);
}

.timeline__list li {
  position: relative;
  color: var(--color-text-body);
  margin-bottom: var(--space-sm);
  padding-left: var(--space-md);
}

.timeline__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ===== EDUCATION SECTION ===== */
.education {
  background: var(--color-bg-accent);
}

.education__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  max-width: 800px;
  margin: 0 auto;
}

@media (min-width: 576px) {
  .education__cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.edu-card {
  background: var(--color-bg-secondary);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
}

.edu-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.edu-card__icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: 50%;
  transition: transform var(--transition-base);
}

.edu-card:hover .edu-card__icon {
  transform: scale(1.1);
}

.edu-card__icon svg {
  width: 28px;
  height: 28px;
  fill: var(--color-text-inverse);
}

.edu-card__school {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: var(--space-sm);
}

.edu-card__degree {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.edu-card__year {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-bg-accent);
  color: var(--color-accent-dark);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
}

/* ===== SKILLS SECTION ===== */
.skills {
  background: var(--color-bg-secondary);
}

.skills__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.skill-category {
  background: var(--color-bg-primary);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.skill-category:hover {
  box-shadow: var(--shadow-lg);
}

.skill-category__title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

/* Language Skills */
.skill-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.skill-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.skill-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-sm);
}

.skill-item__name {
  font-weight: 500;
  color: var(--color-text-heading);
}

.skill-item__level {
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 500;
}

/* Soft Skills Tags */
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.skill-tag {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-secondary);
  color: var(--color-text-body);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.skill-tag:hover {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
  transform: translateY(-3px);
}

/* ===== PORTFOLIO SECTION ===== */
.portfolio {
  background: var(--color-bg-accent);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .portfolio__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .portfolio__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.portfolio-card {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.portfolio-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.portfolio-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-text-inverse);
}

.portfolio-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.portfolio-card__icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.portfolio-card__type {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.portfolio-card__title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  padding: var(--space-lg);
  padding-bottom: var(--space-md);
  color: var(--color-text-heading);
  border-bottom: 1px solid var(--color-border);
}

.portfolio-card__content {
  padding: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  line-height: 1.7;
  flex: 1;
  max-height: 350px;
  overflow-y: auto;
}

.portfolio-card__content::-webkit-scrollbar {
  width: 4px;
}

.portfolio-card__content::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

.portfolio-card__content::-webkit-scrollbar-thumb {
  background: var(--color-accent-light);
  border-radius: var(--radius-full);
}

/* Letter Header Styles */
.letter-header,
.memo-header,
.email-header {
  background: var(--color-bg-primary);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  border-left: 3px solid var(--color-accent);
}

.letter-header p,
.memo-header p,
.email-header p {
  margin-bottom: var(--space-xs);
  font-size: var(--text-xs);
}

.letter-org {
  font-weight: 600;
  color: var(--color-text-heading);
}

.letter-address,
.letter-date {
  color: var(--color-text-muted);
}

/* Letter Body */
.letter-body p,
.memo-body p,
.email-body p {
  margin-bottom: var(--space-sm);
}

.memo-body ul {
  margin: var(--space-sm) 0;
  padding-left: var(--space-lg);
}

.memo-body li {
  margin-bottom: var(--space-xs);
  position: relative;
}

.memo-body li::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-md));
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* Letter Footer */
.letter-footer,
.memo-footer,
.email-footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px dashed var(--color-border);
}

.letter-footer p,
.memo-footer p,
.email-footer p {
  margin-bottom: var(--space-xs);
}

.signature-name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-style: italic;
  color: var(--color-accent);
}

.signature-title,
.signature-company,
.signature-contact {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.reference {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  font-family: var(--font-mono);
}

/* ===== COVER LETTER SECTION ===== */
.cover-letter {
  background: var(--color-bg-primary);
}

.letter {
  background: var(--color-bg-secondary);
  padding: var(--space-3xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.letter::before {
  content: '"';
  position: absolute;
  top: var(--space-lg);
  left: var(--space-xl);
  font-family: var(--font-heading);
  font-size: 6rem;
  color: var(--color-accent-light);
  opacity: 0.3;
  line-height: 1;
}

.letter__content {
  position: relative;
  z-index: 1;
}

.letter__content p {
  font-size: var(--text-base);
  line-height: 1.9;
  color: var(--color-text-body);
  margin-bottom: var(--space-lg);
  text-align: justify;
}

.letter__content p:first-child {
  font-size: var(--text-lg);
  color: var(--color-text-heading);
}

.letter__signature {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.letter__signature p {
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

.letter__signature .signature {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-style: italic;
  color: var(--color-accent);
}

/* ===== CONTACT SECTION ===== */
.contact {
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-primary) 100%);
  color: var(--color-text-inverse);
}

.contact .section-title {
  color: var(--color-text-inverse);
}

.contact .section-title::after {
  background: var(--color-accent-light);
}

.contact .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.contact__info {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

@media (min-width: 576px) {
  .contact__info {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-xl);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
}

.contact-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-5px);
}

.contact-item__icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  border-radius: 50%;
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.contact-item:hover .contact-item__icon {
  transform: scale(1.1);
}

.contact-item__icon svg {
  width: 24px;
  height: 24px;
  fill: var(--color-text-inverse);
}

.contact-item__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-xs);
}

.contact-item__value {
  font-size: var(--text-sm);
  color: var(--color-text-inverse);
  word-break: break-all;
}

.contact__cta {
  text-align: center;
}

.contact .btn-primary {
  background: var(--color-text-inverse);
  color: var(--color-primary);
}

.contact .btn-primary:hover {
  background: var(--color-accent-light);
  color: var(--color-primary-dark);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.footer__copyright {
  font-size: var(--text-sm);
  margin-bottom: var(--space-sm);
}

.footer__credit {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

/* ===== ANIMATIONS ===== */
/* Base Animation States */
[data-animate] {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate="fade-up"] {
  transform: translateY(40px);
}

[data-animate="fade-down"] {
  transform: translateY(-40px);
}

[data-animate="slide-left"] {
  transform: translateX(-60px);
}

[data-animate="slide-right"] {
  transform: translateX(60px);
}

[data-animate="scale-in"] {
  transform: scale(0.9);
}

[data-animate="fade-in"] {
  transform: none;
}

/* Visible State */
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* Stagger Animation Container */
[data-animate-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-animate-stagger].is-visible > *:nth-child(1) { transition-delay: 0.1s; }
[data-animate-stagger].is-visible > *:nth-child(2) { transition-delay: 0.2s; }
[data-animate-stagger].is-visible > *:nth-child(3) { transition-delay: 0.3s; }
[data-animate-stagger].is-visible > *:nth-child(4) { transition-delay: 0.4s; }
[data-animate-stagger].is-visible > *:nth-child(5) { transition-delay: 0.5s; }
[data-animate-stagger].is-visible > *:nth-child(6) { transition-delay: 0.6s; }
[data-animate-stagger].is-visible > *:nth-child(7) { transition-delay: 0.7s; }
[data-animate-stagger].is-visible > *:nth-child(8) { transition-delay: 0.8s; }

[data-animate-stagger].is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Delay Variants */
[data-delay="100"] { transition-delay: 0.1s !important; }
[data-delay="200"] { transition-delay: 0.2s !important; }
[data-delay="300"] { transition-delay: 0.3s !important; }
[data-delay="400"] { transition-delay: 0.4s !important; }
[data-delay="500"] { transition-delay: 0.5s !important; }

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
  }
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 767px) {
  .section {
    padding: var(--space-4xl) 0;
  }

  .hero {
    padding-top: calc(var(--nav-height) + var(--space-2xl));
  }

  .hero__scroll {
    display: none;
  }

  .about__content {
    text-align: center;
  }

  .about__text h3 {
    text-align: center;
  }

  .about__traits {
    justify-content: center;
  }

  .letter {
    padding: var(--space-xl);
  }

  .letter::before {
    font-size: 4rem;
    top: var(--space-sm);
    left: var(--space-md);
  }
}

@media (max-width: 575px) {
  .hero__cta {
    flex-direction: column;
    align-items: center;
  }

  .hero__cta .btn {
    width: 100%;
    max-width: 250px;
  }

  .timeline {
    padding-left: var(--space-lg);
  }

  .timeline::before {
    left: 4px;
  }

  .timeline__marker {
    left: calc(-1 * var(--space-lg) + 1px);
    width: 12px;
    height: 12px;
  }

  .timeline__content {
    padding: var(--space-lg);
  }
}