@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

/* ==========================================================================
   CSS Variables & Design Tokens
   ========================================================================== */
:root {
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Colors */
  --color-primary: #0047FF;
  --color-primary-hover: #0036C7;
  --color-primary-light: #EBF1FF;
  --color-dark: #121214;
  --color-text: #1a1a1e;
  --color-text-muted: #52525b;
  --color-text-light: #71717a;
  --color-bg: #FFFFFF;
  --color-bg-subtle: #F8F9FA;
  --color-border: #E4E4E7;
  --color-border-hover: #121214;
  
  /* Layout */
  --container-max-width: 1100px;
  --container-padding: 2rem;
  --header-height: 90px;
  --transition-standard: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

main.main-content {
  flex: 1 0 auto;
  padding-top: 3.5rem;
  padding-bottom: 5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-standard);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  transition: transform var(--transition-standard);
}

.brand-logo:hover {
  transform: scale(1.03);
}

.brand-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-link {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-dark);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-standard);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

/* Mobile Menu Toggle Button */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1100;
}

.mobile-toggle span {
  width: 32px;
  height: 2.5px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition-standard);
}

.mobile-toggle.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.mobile-toggle.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================================================
   Home / About Section
   ========================================================================== */
.about-hero {
  max-width: 860px;
  margin-top: 1rem;
}

.hero-greeting {
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-dark);
  margin-bottom: 2.25rem;
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: clamp(1.1rem, 1.6vw, 1.25rem);
  line-height: 1.8;
  color: var(--color-text-muted);
  font-weight: 400;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.hero-actions {
  display: flex;
  gap: 1.15rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.hero-actions .btn {
  width: 195px;
  min-width: 195px;
  height: 52px;
  padding: 0.85rem 1rem;
  text-align: center;
  justify-content: center;
  white-space: nowrap;
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.85rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 4px;
  transition: all var(--transition-standard);
}

.btn-primary {
  background-color: var(--color-dark);
  color: #FFFFFF;
  border: 1px solid var(--color-dark);
}

.btn-primary:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-dark);
  border: 1px solid var(--color-dark);
}

.btn-outline:hover {
  background-color: var(--color-dark);
  color: #FFFFFF;
  transform: translateY(-1px);
}

/* ==========================================================================
   Resume Page Styles
   ========================================================================== */
.resume-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: clamp(2rem, 3.2vw, 2.75rem);
  font-weight: 800;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

.resume-section {
  margin-bottom: 4rem;
}

.section-category-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  position: relative;
  display: inline-block;
}

.resume-timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2.5rem;
  margin-bottom: 2.75rem;
}

.timeline-date {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.timeline-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.timeline-role-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.35;
}

.timeline-project-subtitle {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 0.5rem;
}

.timeline-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 0.25rem;
}

.timeline-details li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.timeline-details li::before {
  content: "•";
  position: absolute;
  left: 0.25rem;
  color: var(--color-dark);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Skills list */
.skills-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  line-height: 1.7;
}

.skills-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.skill-tag {
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.85rem;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-dark);
  transition: all var(--transition-standard);
}

.skill-tag:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ==========================================================================
   Contact Page Styles
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: start;
  margin-top: 1rem;
}

.contact-image-container {
  width: 100%;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.contact-image-container img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}

.contact-form-container {
  display: flex;
  flex-direction: column;
}

.form-title {
  font-size: clamp(2rem, 3.2vw, 2.75rem);
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-dark);
}

.form-label .required {
  color: var(--color-primary);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--color-dark);
  background-color: #FFFFFF;
  border: 1px solid var(--color-dark);
  border-radius: 2px;
  outline: none;
  transition: all var(--transition-standard);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 71, 255, 0.15);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-feedback {
  display: none;
  padding: 1rem;
  margin-top: 1rem;
  border-radius: 4px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.form-feedback.success {
  display: block;
  background-color: #e6f4ea;
  color: #137333;
  border: 1px solid #ceead6;
}

.form-feedback.error {
  display: block;
  background-color: #fce8e6;
  color: #c5221f;
  border: 1px solid #fad2cf;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  flex-shrink: 0;
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-column-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 1rem;
}

.footer-email-link {
  font-size: 1.05rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-dark);
  padding-bottom: 2px;
  transition: all var(--transition-standard);
}

.footer-email-link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.social-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--color-dark);
  transition: all var(--transition-standard);
}

.social-link svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
  transition: transform var(--transition-standard);
}

.social-link:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 900px) {
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-image-container img {
    height: 320px;
  }
  
  .resume-timeline-item {
    grid-template-columns: 140px 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
    --container-padding: 1.25rem;
  }

  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem var(--container-padding);
    gap: 1.5rem;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease-in-out;
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.25rem;
    width: 100%;
  }

  .resume-timeline-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .timeline-date {
    color: var(--color-primary);
    font-weight: 700;
  }

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

/* ==========================================================================
   Print Styles for Resume
   ========================================================================== */
@media print {
  .site-header,
  .site-footer,
  .btn,
  .mobile-toggle,
  .resume-actions {
    display: none !important;
  }

  body {
    background: #FFFFFF !important;
    color: #000000 !important;
    font-size: 11pt;
  }

  .container {
    max-width: 100% !important;
    padding: 0 !important;
  }

  .resume-timeline-item {
    page-break-inside: avoid;
    margin-bottom: 1.5rem;
  }

  .page-title {
    font-size: 20pt;
    margin-bottom: 1rem;
  }
}