/* ==========================================
   CSS VARIABLES & RESET
   ========================================== */

:root {
    /* Colors */
    --color-primary: #1a1a1a;
    --color-secondary: #666;
    --color-accent: #0066ff;
    --color-background: #ffffff;
    --color-surface: #f8f8f8;
    --color-border: #e0e0e0;
    
    /* Typography */
    --font-display: 'Crimson Pro', Georgia, serif;
    --font-body: 'Work Sans', -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --max-width: 1400px;
    --nav-height: 80px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    opacity: 0.7;
}

/* ==========================================
   NAVIGATION
   ========================================== */

.navigation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    animation: slideDown 0.6s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo svg {
    display: block;
    color: var(--color-primary);
    transition: transform var(--transition-smooth);
}

.logo:hover svg {
    transform: rotate(180deg);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
}

.nav-links a {
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 2px;
}

.nav-links a.active {
    font-weight: 500;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-smooth);
}

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

/* ==========================================
   MAIN CONTAINER & GRID
   ========================================== */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--nav-height) + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
    animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: start;
}

/* ==========================================
   PROFILE SECTION
   ========================================== */

.profile-section {
    position: sticky;
    top: calc(var(--nav-height) + var(--spacing-md));
    animation: fadeInLeft 0.8s ease 0.2s backwards;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.profile-image {
    margin-bottom: var(--spacing-md);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.profile-image:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.image-placeholder {
    aspect-ratio: 1;
    background: var(--color-surface);
}

.bio {
    margin-bottom: var(--spacing-md);
}

.bio p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
    font-size: 15px;
}

.personal-note {
    font-style: italic;
    color: var(--color-secondary);
    opacity: 0.8;
}

.location {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-secondary);
    font-size: 14px;
}

/* ==========================================
   TIMELINE SECTION
   ========================================== */

.timeline-section {
    animation: fadeInRight 0.8s ease 0.3s backwards;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.timeline-block {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition-smooth);
}

.timeline-block:last-of-type {
    border-bottom: none;
}

.timeline-block:hover {
    transform: translateX(8px);
}

.year-marker {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--color-secondary);
    line-height: 1.8;
}

.timeline-content strong {
    color: var(--color-primary);
    font-weight: 500;
}

.section-divider {
    height: 1px;
    background: linear-gradient(to right, var(--color-border), transparent);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.subsection-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
}

.community-section {
    border-bottom: none;
}

/* ==========================================
   SKILLS GRID
   ========================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.skills-column h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.skills-column ul {
    list-style: none;
}

.skills-column li {
    color: var(--color-secondary);
    padding: var(--spacing-xs) 0;
    font-size: 15px;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.skills-column li:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

/* ==========================================
    FOOTER
   ========================================== */

.footer {
    background: var(--color-surface);
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-section h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.social-links a {
    color: var(--color-secondary);
    font-size: 15px;
    transition: color var(--transition-fast), transform var(--transition-fast);
    display: inline-block;
}

.social-links a:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.footer-cta {
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary);
    color: var(--color-background);
    border-radius: 6px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all var(--transition-smooth);
}

.cta-button:hover {
    opacity: 1;
    background: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.3);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-secondary);
    font-size: 14px;
}

/* ==========================================
   UTILITIES
   ========================================== */

.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   CERTIFICATES PAGE STYLES
   ========================================== */

.certificates-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--nav-height) + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
}

.certificates-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeIn 0.8s ease;
}

.certificates-header h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.header-subtitle {
    font-size: 18px;
    color: var(--color-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.certificates-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.certificate-card {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: calc(var(--card-index, 0) * 0.1s);
}

.certificate-card:nth-child(1) { --card-index: 1; }
.certificate-card:nth-child(2) { --card-index: 2; }
.certificate-card:nth-child(3) { --card-index: 3; }
.certificate-card:nth-child(4) { --card-index: 4; }
.certificate-card:nth-child(5) { --card-index: 5; }
.certificate-card:nth-child(6) { --card-index: 6; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.certificate-link {
    display: block;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition-smooth);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.certificate-link:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
    border-color: var(--color-accent);
    opacity: 1;
}

.certificate-image {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-surface);
}

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

.certificate-link:hover .certificate-image img {
    transform: scale(1.05);
}

.certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 102, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.certificate-link:hover .certificate-overlay {
    opacity: 1;
}

.view-certificate {
    color: white;
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 0.5px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid white;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.certificate-link:hover .view-certificate {
    background: white;
    color: var(--color-accent);
}

.certificate-info {
    padding: var(--spacing-md);
}

.certificate-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
    line-height: 1.3;
}

.certificate-issuer {
    font-size: 15px;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 4px;
}

.certificate-date {
    font-size: 14px;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.certificate-description {
    font-size: 15px;
    color: var(--color-secondary);
    line-height: 1.7;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

/* ==========================================
   WORK PAGE STYLES
   ========================================== */

.work-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: calc(var(--nav-height) + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
}

.work-intro {
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
    animation: fadeIn 0.8s ease;
}

.work-intro h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.work-description {
    color: var(--color-secondary);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1px;
  margin-bottom: var(--spacing-xl);
  background: var(--color-border);
  border: 1px solid var(--color-border);
}

.project-card {
  background: var(--color-background);
  border-radius: 0;
  overflow: hidden;
  border: none;
  transition: all var(--transition-smooth);
  animation: fadeIn 0.6s ease backwards;
  display: flex;
  flex-direction: column;
}

.project-card:nth-child(1) { animation-delay: 0.05s; }
.project-card:nth-child(2) { animation-delay: 0.1s; }
.project-card:nth-child(3) { animation-delay: 0.15s; }
.project-card:nth-child(4) { animation-delay: 0.2s; }
.project-card:nth-child(5) { animation-delay: 0.25s; }
.project-card:nth-child(6) { animation-delay: 0.3s; }
.project-card:nth-child(7) { animation-delay: 0.35s; }
.project-card:nth-child(8) { animation-delay: 0.4s; }

.project-card:hover {
  transform: none;
  box-shadow: none;
  background: var(--color-surface);
}

.project-card.tall,
.project-card.wide {
  grid-column: auto;
  grid-row: auto;
}

.project-image {
  position: relative;
  overflow: hidden;
  background: var(--color-surface);
  aspect-ratio: 1.5;
  border-bottom: 1px solid var(--color-border);
}

.project-card.tall .project-image,
.project-card.wide .project-image {
  aspect-ratio: 1.5;
}

.placeholder-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface) !important;
  transition: opacity var(--transition-smooth);
  position: relative;
}

.project-card:hover .placeholder-image {
  transform: none;
  opacity: 1;
}

.placeholder-image svg {
  display: none;
}

.placeholder-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 300;
  color: var(--color-border);
  transition: all var(--transition-smooth);
  z-index: 1;
}

.project-card:hover .placeholder-number {
  color: transparent;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.placeholder-image.has-image {
  background: none !important;
}

.placeholder-image.has-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

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

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  background: rgba(0, 0, 0, 0.75);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  z-index: 2;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-overlay-content {
  text-align: center;
  color: white;
}

.project-overlay-content p {
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.project-info {
  padding: var(--spacing-md);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.project-info h3 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0;
  line-height: 1.5;
  color: var(--color-primary);
  letter-spacing: 0;
}

.project-info p {
  display: none;
}

.project-info .year {
  display: inline-block;
  font-size: 12px;
  color: var(--color-secondary);
  font-weight: 400;
  letter-spacing: 0;
  margin-top: auto;
}

/* ==========================================
   PROJECT DETAILS PAGE STYLES
   ========================================== */

.project-hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--nav-height) + var(--spacing-xl)) var(--spacing-md) var(--spacing-lg);
  text-align: center;
  animation: fadeIn 0.8s ease;
}

.project-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 400;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.project-subtitle {
  font-size: 20px;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.project-meta {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.meta-item {
  text-align: center;
}

.meta-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-secondary);
  margin-bottom: 4px;
  font-weight: 500;
}

.meta-value {
  font-size: 15px;
  color: var(--color-primary);
  font-weight: 500;
}

.project-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

.project-section {
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease backwards;
}

.project-section:nth-child(1) { animation-delay: 0.1s; }
.project-section:nth-child(2) { animation-delay: 0.2s; }
.project-section:nth-child(3) { animation-delay: 0.3s; }

.section-heading {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.01em;
}

.project-description {
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-secondary);
}

.project-description p {
  margin-bottom: var(--spacing-sm);
}

.image-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.showcase-item {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: var(--color-surface);
  aspect-ratio: 4/3;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.showcase-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.showcase-item.featured {
  grid-column: auto;
  aspect-ratio: 4/3; 
}

.showcase-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-smooth);
  overflow: hidden;
}

.showcase-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.showcase-item:hover .showcase-placeholder {
  transform: scale(1.05);
}

.zoomable {
  cursor: zoom-in;
}

.image-modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.95);
  animation: fadeIn 0.3s ease;
  padding: 40px 20px;
  box-sizing: border-box;
}

.image-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  margin: auto;
  display: block;
  max-width: 90%;
  max-height: 85vh;
  width: auto;
  height: auto;
  object-fit: contain;
  animation: zoomIn 0.3s ease;
  cursor: zoom-out;
  position: relative;
  z-index: 10001;
}

@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-close {
  position: fixed;
  top: 30px;
  right: 50px;
  color: #fff;
  font-size: 50px;
  font-weight: 300;
  cursor: pointer;
  transition: color 0.3s ease;
  z-index: 10002;
  line-height: 1;
  background: rgba(0, 0, 0, 0.5);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover,
.modal-close:focus {
  color: #bbb;
  background: rgba(0, 0, 0, 0.7);
}

.modal-caption {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  max-width: 700px;
  text-align: center;
  color: #ccc;
  padding: 15px 20px;
  font-size: 16px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 8px;
  z-index: 10001;
}

.project-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
  flex-wrap: wrap;
}

.project-link-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-primary);
  color: var(--color-background);
  border-radius: 8px;
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.5px;
  transition: all var(--transition-smooth);
  text-decoration: none;
  border: 2px solid var(--color-primary);
}

.project-link-btn:hover {
  opacity: 1;
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 102, 255, 0.3);
}

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

.project-link-btn.secondary:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
}

.project-link-btn svg {
  width: 18px;
  height: 18px;
}

.project-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border-radius: 12px;
  margin-bottom: var(--spacing-lg);
}

.detail-block h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

.detail-block p, .detail-block ul {
  color: var(--color-secondary);
  font-size: 15px;
  line-height: 1.7;
}

.detail-block ul {
  list-style: none;
  padding: 0;
}

.detail-block li {
  padding: 4px 0;
  position: relative;
  padding-left: 20px;
}

.detail-block li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

.back-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--nav-height) + var(--spacing-sm)) var(--spacing-md) 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-secondary);
  font-size: 14px;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.back-link:hover {
  color: var(--color-accent);
  transform: translateX(-4px);
}

.back-link svg {
  width: 16px;
  height: 16px;
}

/* ==========================================
   GLOBAL RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .profile-section {
        position: relative;
        top: 0;
        display: grid;
        grid-template-columns: 300px 1fr;
        gap: var(--spacing-md);
        align-items: start;
    }
    
    .profile-image {
        grid-row: 1 / 3;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --nav-height: 60px;
    }
    
    .navigation {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-links a {
        font-size: 13px;
    }
    
    .container,
    .work-container,
    .certificates-container {
        padding: calc(var(--nav-height) + var(--spacing-md)) var(--spacing-sm) var(--spacing-md);
    }
    
    .profile-section {
        grid-template-columns: 1fr;
    }
    
    .profile-image {
        grid-row: auto;
        max-width: 300px;
        margin: 0 auto var(--spacing-md);
    }
    
    .portfolio-grid,
    .skills-grid,
    .footer-content,
    .image-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .project-card.wide,
    .project-card.tall {
        grid-column: auto;
        grid-row: auto;
    }
    
    .project-card .project-image {
        aspect-ratio: 1.5;
    }
    
    .placeholder-number {
        font-size: 3rem;
    }
    
    .project-overlay-content p {
        font-size: 14px;
    }

    .footer-cta {
        justify-content: flex-start;
    }
    
    .certificates-header {
        margin-bottom: var(--spacing-lg);
    }

    .certificates-header h1 {
        font-size: 2rem;
    }

    .header-subtitle {
        font-size: 16px;
    }

    .certificates-grid {
        gap: var(--spacing-md);
    }

    .certificate-image {
        aspect-ratio: 4/3;
    }

    .certificate-info {
        padding: var(--spacing-sm);
    }

    .certificate-title {
        font-size: 1.25rem;
    }

    .certificate-description {
        font-size: 14px;
    }

    /* Modal Adjustments */
    .modal-close {
        top: 15px;
        right: 25px;
        font-size: 35px;
        width: 40px;
        height: 40px;
    }
    
    .modal-content {
        width: 95%;
        max-height: 80vh;
    }
    
    .modal-caption {
        bottom: 15px;
        width: 90%;
        font-size: 14px;
        padding: 10px 15px;
    }

    .project-meta {
        gap: var(--spacing-sm);
    }

    .project-links {
        flex-direction: column;
        align-items: stretch;
    }

    .project-link-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .section-title,
    .work-intro h1 {
        font-size: 2rem;
    }
    
    .logo svg {
        width: 32px;
        height: 32px;
    }
    
    .certificates-header h1 {
        font-size: 1.75rem;
    }

    .certificate-title {
        font-size: 1.1rem;
    }
}