/* ==========================================================================
   Main Styles - Personal Website
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

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

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

.text-secondary { color: var(--color-text-secondary); }
.text-accent { color: var(--color-accent); }

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.main-content {
  flex: 1;
  padding-top: calc(var(--header-height) + var(--space-8));
  padding-bottom: var(--space-16);
}

.section {
  padding: var(--space-16) 0;
}

.section-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
  margin-left: var(--space-4);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-nav-border);
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

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

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-bg-secondary);
}

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

.nav-link.terminal-link {
  font-family: var(--font-mono);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
}

.nav-link.terminal-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-left: var(--space-2);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .sun-icon { display: none; }
.theme-toggle .moon-icon { display: block; }

[data-theme="dark"] .theme-toggle .sun-icon { display: block; }
[data-theme="dark"] .theme-toggle .moon-icon { display: none; }

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-fast);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: var(--space-20) 0;
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.hero-content {
  flex: 1;
}

.hero-greeting {
  font-size: var(--text-lg);
  color: var(--color-accent);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-2);
}

.hero-title {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-image {
  flex-shrink: 0;
}

.hero-avatar {
  width: 280px;
  height: 280px;
  border-radius: var(--radius-2xl);
  background: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  border: 3px solid var(--color-border);
  overflow: hidden;
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

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

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

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-fast);
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px var(--color-card-shadow);
  transform: translateY(-2px);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.card-title a {
  color: var(--color-text);
}

.card-title a:hover {
  color: var(--color-accent);
}

.card-meta {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: 0;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* ==========================================================================
   Grid Layouts
   ========================================================================== */

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ==========================================================================
   Tags
   ========================================================================== */

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

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

.social-links {
  display: flex;
  gap: var(--space-4);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

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

.social-link svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   Page Headers
   ========================================================================== */

.page-header {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-12);
}

.page-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.page-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: 0;
}

/* ==========================================================================
   Blog Cards
   ========================================================================== */

.blog-card {
  display: flex;
  flex-direction: column;
  position: relative;
  cursor: pointer;
}

/* Stretched link - makes entire card clickable */
.blog-card .card-title a::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.blog-card-image {
  width: 100%;
  height: 200px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
}

.blog-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card-content {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-content .card-description {
  flex: 1;
}

/* ==========================================================================
   Speaking Events
   ========================================================================== */

.event-card {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
}

.event-date {
  flex-shrink: 0;
  width: 80px;
  text-align: center;
  padding: var(--space-3);
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
}

.event-date-month {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-accent);
  text-transform: uppercase;
}

.event-date-day {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-accent);
}

.event-content {
  flex: 1;
}

.event-type {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
}

.event-type.upcoming {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.event-type.past {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Photo Gallery
   ========================================================================== */

.gallery-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.gallery-tab {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-tab:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.gallery-tab.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

.gallery-item {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  background: var(--color-bg-secondary);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-4);
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: white;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  transition: opacity 0.2s ease;
}

.lightbox-content img.loading {
  opacity: 0;
}

.lightbox-loader {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: none;
}

.lightbox-loader.active {
  display: block;
}

.lightbox-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.1);
  border: none;
  border-radius: var(--radius-full);
  color: white;
  font-size: var(--text-2xl);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
}

.lightbox-caption {
  text-align: center;
  color: white;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
}

/* ==========================================================================
   About Page
   ========================================================================== */

.about-intro {
  display: flex;
  gap: var(--space-12);
  align-items: flex-start;
  margin-bottom: var(--space-16);
}

.about-text {
  flex: 1;
}

.about-text p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.about-image {
  flex-shrink: 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-3);
}

.skill-item {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  text-align: center;
  transition: all var(--transition-fast);
  word-break: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

.skill-item:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.timeline-year {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.timeline-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.timeline-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ==========================================================================
   Contact Page
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
}

.contact-info h3 {
  margin-bottom: var(--space-6);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-lg);
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-label {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-1);
}

.contact-value {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
}

.contact-form h3 {
  margin-bottom: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-family: inherit;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

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

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

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .hero {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero-cta {
    justify-content: center;
  }

  .about-intro {
    flex-direction: column-reverse;
    text-align: center;
  }

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

@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-4);
  }

  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-avatar {
    width: 200px;
    height: 200px;
    font-size: var(--text-4xl);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-nav-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    flex-direction: column;
    gap: var(--space-2);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: var(--space-3);
  }

  .menu-toggle {
    display: flex;
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
  }

  .event-card {
    flex-direction: column;
  }

  .event-date {
    width: auto;
    display: inline-flex;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
  }

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

  .page-title {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--text-2xl);
  }

  .section-title {
    font-size: var(--text-xl);
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .page-title {
    font-size: var(--text-2xl);
    word-wrap: break-word;
  }

  .gallery-tabs {
    overflow-x: auto;
    overflow-y: hidden;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    max-width: 100%;
    width: 100%;
  }

  .gallery-tabs::-webkit-scrollbar {
    display: none;
  }

  .gallery-tab {
    flex-shrink: 0;
    white-space: nowrap;
  }
}

/* Extra small screens (320px) */
@media (max-width: 360px) {
  :root {
    --container-padding: var(--space-3);
  }

  .hero-title {
    font-size: var(--text-xl);
  }

  .hero-subtitle {
    font-size: var(--text-base);
  }

  .hero-avatar {
    width: 150px;
    height: 150px;
    font-size: var(--text-3xl);
  }

  .btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
  }

  .card {
    padding: var(--space-4);
  }

  .card-title {
    font-size: var(--text-base);
  }

  .page-header {
    padding: var(--space-8) 0;
  }

  .section {
    padding: var(--space-8) 0;
  }

  .footer-inner {
    gap: var(--space-4);
  }

  .social-links {
    gap: var(--space-2);
  }

  .social-link {
    width: 36px;
    height: 36px;
  }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden { display: none !important; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.text-center { text-align: center; }

/* ==========================================================================
   View More Link
   ========================================================================== */

.view-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-medium);
  color: var(--color-accent);
  margin-top: var(--space-6);
}

.view-more:hover {
  gap: var(--space-3);
}

.view-more svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.view-more:hover svg {
  transform: translateX(4px);
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
  color: var(--color-text-secondary);
}

.empty-state-icon {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

/* ==========================================================================
   Loading State
   ========================================================================== */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Bookshelf Page
   ========================================================================== */

.book-card {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.book-cover {
  height: 200px;
  background: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Book cards without cover images */
.book-card.no-cover {
  border-left: 4px solid var(--color-accent);
}

.book-card.no-cover .book-content {
  padding-top: var(--space-6);
}

.book-content {
  padding: var(--space-6);
}

.book-status {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  margin-right: var(--space-2);
  text-transform: uppercase;
}

.book-status.reading {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.book-type {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: capitalize;
}

.book-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin: var(--space-2) 0;
  line-height: var(--leading-tight);
}

.book-author {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.book-rating {
  color: var(--color-accent);
  font-size: var(--text-sm);
  letter-spacing: 2px;
  margin-bottom: var(--space-2);
}

.book-summary {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-accent);
}

.book-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Research Papers Page
   ========================================================================== */

.paper-card {
  padding: var(--space-6);
}

.paper-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.paper-status {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.paper-status.reading {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.paper-venue {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-weight: var(--font-medium);
}

.paper-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
  line-height: var(--leading-tight);
}

.paper-authors {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.paper-abstract {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.paper-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-accent);
}

.paper-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Certifications Page
   ========================================================================== */

.cert-stats {
  margin-bottom: var(--space-8);
}

.cert-stats-inner {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  display: flex;
  gap: var(--space-3);
}

.cert-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.category-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
}

.category-tag:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.category-tag.active {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.cert-card {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-6);
}

.cert-badge {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-badge img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.cert-badge-placeholder {
  width: 80px;
  height: 80px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-content {
  flex: 1;
  min-width: 0;
}

.cert-status {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
}

.cert-status.active {
  background: rgba(34, 197, 94, 0.1);
  color: rgb(34, 197, 94);
}

.cert-status.expired {
  background: rgba(239, 68, 68, 0.1);
  color: rgb(239, 68, 68);
}

.cert-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.cert-star {
  color: #FFD700;
  text-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
  font-size: 1.1em;
}

.cert-issuer {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.cert-dates {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.cert-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.cert-credential {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-family: monospace;
  margin-bottom: var(--space-3);
}

.cert-verify {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-accent);
}

.cert-verify:hover {
  text-decoration: underline;
}

/* Responsive adjustments for new pages */
@media (max-width: 768px) {
  .cert-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .cert-stats-inner {
    justify-content: center;
  }
}

/* ==========================================================================
   Now Page
   ========================================================================== */

.now-updated {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  background: var(--color-bg-secondary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-top: var(--space-4);
}

.now-sections {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.now-section {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
}

.now-section-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.now-section-icon {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
}

.now-section-icon svg {
  width: 100%;
  height: 100%;
}

.now-section-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin: 0;
}

.now-section-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.now-section-list li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.now-section-list li:last-child {
  margin-bottom: 0;
}

.now-section-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

.now-footer {
  margin-top: var(--space-12);
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.now-footer a {
  color: var(--color-accent);
  text-decoration: none;
}

.now-footer a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Blog Post Typography
   ========================================================================== */

.blog-post-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.blog-post-content h1,
.blog-post-content h2,
.blog-post-content h3,
.blog-post-content h4,
.blog-post-content h5,
.blog-post-content h6 {
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.blog-post-content h1 { font-size: var(--text-3xl); }
.blog-post-content h2 { font-size: var(--text-2xl); }
.blog-post-content h3 { font-size: var(--text-xl); }
.blog-post-content h4 { font-size: var(--text-lg); }

.blog-post-content p {
  margin-bottom: var(--space-6);
}

.blog-post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.blog-post-content a:hover {
  color: var(--color-accent-hover);
}

.blog-post-content strong {
  color: var(--color-text);
  font-weight: var(--font-semibold);
}

.blog-post-content em {
  font-style: italic;
}

/* Lists */
.blog-post-content ul,
.blog-post-content ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.blog-post-content li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-relaxed);
}

.blog-post-content ul li {
  list-style-type: disc;
}

.blog-post-content ol li {
  list-style-type: decimal;
}

.blog-post-content li > ul,
.blog-post-content li > ol {
  margin-top: var(--space-2);
  margin-bottom: var(--space-2);
}

/* Blockquotes */
.blog-post-content blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-secondary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.blog-post-content blockquote p:last-child {
  margin-bottom: 0;
}

/* Code - Inline */
.blog-post-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-bg-secondary);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

/* Code - Block (Prism handles styling, but we add spacing) */
.blog-post-content pre {
  margin: var(--space-6) 0;
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

.blog-post-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* Images */
.blog-post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
}

/* Horizontal Rule */
.blog-post-content hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-8) 0;
}

/* Tables */
.blog-post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
  font-size: var(--text-base);
}

.blog-post-content th,
.blog-post-content td {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  text-align: left;
}

.blog-post-content th {
  background: var(--color-bg-secondary);
  font-weight: var(--font-semibold);
  color: var(--color-text);
}

.blog-post-content tr:nth-child(even) {
  background: var(--color-bg-secondary);
}

/* Blog Post Header */
.blog-post-header {
  text-align: center;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.blog-post-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.blog-post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.blog-post-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.blog-post-cover {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-8);
}

/* Blog Post Navigation */
.blog-post-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-8);
}

.blog-post-share {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.blog-post-share span {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.share-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

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

/* Responsive Typography */
@media (max-width: 768px) {
  .blog-post-content {
    font-size: var(--text-base);
  }

  .blog-post-title {
    font-size: var(--text-2xl);
  }

  .blog-post-content h1 { font-size: var(--text-2xl); }
  .blog-post-content h2 { font-size: var(--text-xl); }
  .blog-post-content h3 { font-size: var(--text-lg); }

  .blog-post-nav {
    flex-direction: column;
    gap: var(--space-4);
  }
}