/* Base & Reset */
:root {
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  --secondary-50: #f5f3ff;
  --secondary-100: #ede9fe;
  --secondary-200: #ddd6fe;
  --secondary-300: #c4b5fd;
  --secondary-400: #a78bfa;
  --secondary-500: #8b5cf6;
  --secondary-600: #7c3aed;
  --secondary-700: #6d28d9;
  --secondary-800: #5b21b6;
  --secondary-900: #4c1d95;

  --success-50: #ecfdf5;
  --success-100: #d1fae5;
  --success-200: #a7f3d0;
  --success-300: #6ee7b7;
  --success-400: #34d399;
  --success-500: #10b981;
  --success-600: #059669;
  --success-700: #047857;
  --success-800: #065f46;
  --success-900: #064e3b;

  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-200: #fde68a;
  --warning-300: #fcd34d;
  --warning-400: #fbbf24;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  --warning-700: #b45309;
  --warning-800: #92400e;
  --warning-900: #78350f;

  --error-50: #fef2f2;
  --error-100: #fee2e2;
  --error-200: #fecaca;
  --error-300: #fca5a5;
  --error-400: #f87171;
  --error-500: #ef4444;
  --error-600: #dc2626;
  --error-700: #b91c1c;
  --error-800: #991b1b;
  --error-900: #7f1d1d;

  --neutral-50: #f9fafb;
  --neutral-100: #f3f4f6;
  --neutral-200: #e5e7eb;
  --neutral-300: #d1d5db;
  --neutral-400: #9ca3af;
  --neutral-500: #6b7280;
  --neutral-600: #4b5563;
  --neutral-700: #374151;
  --neutral-800: #1f2937;
  --neutral-900: #111827;

  --spacing-1: 0.25rem; /* 4px */
  --spacing-2: 0.5rem; /* 8px */
  --spacing-3: 0.75rem; /* 12px */
  --spacing-4: 1rem; /* 16px */
  --spacing-5: 1.25rem; /* 20px */
  --spacing-6: 1.5rem; /* 24px */
  --spacing-8: 2rem; /* 32px */
  --spacing-10: 2.5rem; /* 40px */
  --spacing-12: 3rem; /* 48px */
  --spacing-16: 4rem; /* 64px */
  --spacing-20: 5rem; /* 80px */

  --border-radius-sm: 0.125rem; /* 2px */
  --border-radius: 0.25rem; /* 4px */
  --border-radius-md: 0.375rem; /* 6px */
  --border-radius-lg: 0.5rem; /* 8px */
  --border-radius-xl: 0.75rem; /* 12px */
  --border-radius-2xl: 1rem; /* 16px */
  --border-radius-3xl: 1.5rem; /* 24px */
  --border-radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 8px 10px -6px rgba(0, 0, 0, 0.1);

  --transition-fast: 150ms;
  --transition-normal: 300ms;
  --transition-slow: 500ms;

  --container-max-width: 1280px;
  --container-padding: var(--spacing-4);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}
mark {
  background-color: rgb(255, 123, 0);
  color: black;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal),
    color var(--transition-normal);
}

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

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

ul,
ol {
  list-style: none;
}

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

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

section {
  padding: var(--spacing-12) 0;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-4);
  line-height: 1.2;
}

.page-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-8);
  text-align: center;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  padding-top: var(--spacing-2);
  padding-bottom: var(--spacing-2);
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.25rem;
  transition: color var(--transition-fast);
}

.logo-icon {
  margin-right: var(--spacing-2);
  font-size: 1.5rem;
}

.nav-desktop {
  display: none;
}

.nav-list {
  display: flex;
  gap: var(--spacing-6);
}

.nav-link {
  position: relative;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-600);
  border-radius: var(--border-radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.theme-toggle,
.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--border-radius-full);
  transition: background-color var(--transition-fast);
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 1.5rem;
  height: 1.25rem;
  padding: 0.25rem 0;
}

.menu-bar {
  width: 100%;
  height: 2px;
  border-radius: var(--border-radius-full);
  transition: transform var(--transition-normal),
    opacity var(--transition-normal);
}

.nav-mobile {
  position: fixed;
  top: 4rem;
  left: 0;
  width: 100%;
  padding: var(--spacing-4);
  transform: translateY(-100%);
  z-index: 90;
  transition: transform var(--transition-normal);
}

.nav-mobile .nav-list {
  flex-direction: column;
  gap: var(--spacing-4);
}

.nav-mobile.open {
  transform: translateY(0);
}

/* Search */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal),
    visibility var(--transition-normal);
}

.search-overlay.open {
  opacity: 1;
  visibility: visible;
}

.search-container {
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-6);
}

.search-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
}

.search-close {
  font-size: 1.5rem;
}

.search-form {
  display: flex;
  margin-bottom: var(--spacing-6);
}

.search-input {
  flex: 1;
  padding: var(--spacing-3) var(--spacing-4);
  border: none;
  border-radius: var(--border-radius-full) 0 0 var(--border-radius-full);
  font-size: 1rem;
  outline: none;
}

.search-button {
  padding: var(--spacing-3) var(--spacing-5);
  border-radius: 0 var(--border-radius-full) var(--border-radius-full) 0;
}

.search-results {
  display: grid;
  gap: var(--spacing-4);
}

/* Hero Section */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
  padding: var(--spacing-16) 0;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-4);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto;
}

/* Categories Section */
.categories-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.category-card {
  position: relative;
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal);
  height: 200px;
}

.category-card:hover {
  transform: translateY(-5px);
}

.category-content {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: var(--spacing-6);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: white;
}

.category-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-2);
}

.category-description {
  font-size: 0.875rem;
  opacity: 0.9;
}

.category-count {
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--neutral-900);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--border-radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

.category-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
  opacity: 0.3;
  transition: opacity var(--transition-normal),
    transform var(--transition-normal);
}

.category-card:hover .category-icon {
  opacity: 0.4;
  transform: translate(-50%, -50%) scale(1.1);
}

/* Featured Resources */
.featured-resources {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

/* Resources */
.resources-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
  max-height: 600px; /* fixed height to enable scrolling */
  overflow-y: auto; /* vertical scrollbar when content overflows */
}

.resource-card {
  position: relative;
  height: 200px;
  perspective: 1000px;
}

.resource-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform var(--transition-normal);
  transform-style: preserve-3d;
}

.resource-card:hover .resource-inner {
  transform: rotateY(180deg);
}

.resource-front,
.resource-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.resource-front {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--spacing-6);
}

.resource-back {
  padding: var(--spacing-6);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.resource-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-2);
}

.resource-description {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-4);
}

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

.resource-tag {
  font-size: 0.75rem;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--border-radius-full);
}

.resource-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.resource-icon {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-2);
}

/* Updates Section */
.update-timeline {
  position: relative;
  margin-top: var(--spacing-8);
}

.update-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 24px;
  width: 2px;
  background-color: var(--primary-200);
}

.update-item {
  position: relative;
  padding-left: 48px;
  padding-bottom: var(--spacing-8);
}

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

.update-dot {
  position: absolute;
  top: 0;
  left: 16px;
  width: 16px;
  height: 16px;
  border-radius: var(--border-radius-full);
  transform: translateX(-50%);
}

.update-date {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-2);
}

.update-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-2);
}

.update-content {
  margin-bottom: var(--spacing-4);
}

.update-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.update-tag {
  font-size: 0.75rem;
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--border-radius-full);
}

.view-all-container {
  text-align: center;
  margin-top: var(--spacing-8);
}

.view-all-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--border-radius-full);
  font-weight: 500;
  transition: background-color var(--transition-fast),
    color var(--transition-fast);
}

/* About Page */
.about-hero {
  padding: var(--spacing-12) 0 var(--spacing-6);
  text-align: center;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  margin-top: var(--spacing-8);
}

.profile-img-container {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

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

.about-header {
  text-align: center;
  margin-bottom: var(--spacing-6);
}

.about-role {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-4);
}

.about-social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-4);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--border-radius-full);
  transition: background-color var(--transition-fast),
    color var(--transition-fast);
}

.about-bio {
  margin-bottom: var(--spacing-6);
}

.about-bio p + p {
  margin-top: var(--spacing-4);
}

.about-skills h3 {
  margin-bottom: var(--spacing-4);
  font-size: 1.25rem;
}

.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.skill-tag {
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--border-radius-full);
  font-size: 0.875rem;
}

/* Mission Section */
.mission-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.mission-content > p {
  margin-bottom: var(--spacing-8);
}

.mission-goals {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.mission-goal {
  padding: var(--spacing-6);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.goal-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-4);
}

.mission-goal h3 {
  margin-bottom: var(--spacing-2);
  font-size: 1.25rem;
}

/* Contact Section */
.contact-methods {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.contact-card {
  padding: var(--spacing-6);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-4);
}

.contact-card h3 {
  margin-bottom: var(--spacing-2);
  font-size: 1.25rem;
}

.contact-card a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Updates Page */
.updates-hero {
  padding: var(--spacing-12) 0 var(--spacing-6);
  text-align: center;
}

.updates-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

.filter-btn {
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--border-radius-full);
  font-size: 0.875rem;
  transition: background-color var(--transition-fast),
    color var(--transition-fast);
}

.filter-btn.active {
  background-color: var(--primary-600);
  color: white;
}

/* Category Page */
.category-hero {
  padding: var(--spacing-12) 0 var(--spacing-6);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  z-index: 10;
}

/* Footer */
.footer {
  padding: var(--spacing-12) 0 var(--spacing-6);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

.footer-branding p {
  margin-top: var(--spacing-2);
}

.footer-links h3,
.footer-social h3 {
  margin-bottom: var(--spacing-4);
  font-size: 1.125rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.social-icons {
  display: flex;
  gap: var(--spacing-4);
}

.footer-bottom {
  padding-top: var(--spacing-6);
  text-align: center;
}

/* Media Queries */
@media (min-width: 640px) {
  .categories-grid,
  .featured-resources,
  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .mission-goals,
  .contact-methods {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.25rem;
  }

  .hero-title {
    font-size: 3rem;
  }

  .hero-subtitle {
    font-size: 1.5rem;
  }

  .nav-desktop {
    display: block;
  }

  .menu-toggle {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr 2fr;
    text-align: left;
  }

  .about-header {
    text-align: left;
  }

  .about-social {
    justify-content: flex-start;
  }

  .profile-img-container {
    width: 255px;
    height: 133px;
    object-fit: cover;
  }

  .update-timeline::before {
    left: 50%;
  }

  .update-item {
    padding-left: 0;
    padding-right: 50%;
    padding-bottom: var(--spacing-12);
  }

  .update-item:nth-child(even) {
    padding-left: 50%;
    padding-right: 0;
  }

  .update-dot {
    left: 50%;
  }

  .update-item:nth-child(even) .update-content-inner {
    margin-left: var(--spacing-8);
  }

  .update-item:nth-child(odd) .update-content-inner {
    margin-right: var(--spacing-8);
    text-align: right;
  }

  .update-item:nth-child(odd) .update-tags {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .categories-grid,
  .resources-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .mission-goals,
  .contact-methods {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-content {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-16);
  }
}

@media (min-width: 1280px) {
  .categories-grid,
  .resources-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}