/* 
 * Sudipto Paul Portfolio - Global Styles
 * Dark theme with glassmorphic UI and smooth animations
 */

/* ============================================
   CSS VARIABLES & THEME
   ============================================ */
:root {
  /* Colors */
  --accent-primary: #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.1);
  
  --bg-primary: #0a0a0f;
  --bg-secondary: #121218;
  --bg-tertiary: #1a1a24;
  --bg-card: rgba(26, 26, 36, 0.6);
  --bg-glass: rgba(18, 18, 24, 0.8);
  
  --text-primary: #e4e4e7;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(99, 102, 241, 0.3);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Poppins', var(--font-primary);
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.12s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 50;
  --z-modal: 100;
  --z-toast: 200;
}

/* Light theme (optional) */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f4f4f5;
  --bg-tertiary: #e4e4e7;
  --bg-card: rgba(244, 244, 245, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.8);
  
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-tertiary: #a1a1aa;
  
  --border-color: rgba(0, 0, 0, 0.1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.2);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-anchor: none;
}

body {
  overflow-anchor: none;
}

/* Ensure page loads at top */
html, body {
  scroll-padding-top: 0;
}

/* Optional: Add this to prevent any layout shifts */
main {
  overflow-anchor: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ============================================
   SKIP TO CONTENT (Accessibility)
   ============================================ */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-primary);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  z-index: var(--z-toast);
  font-weight: 600;
  transition: top var(--transition-base);
}

.skip-to-content:focus {
  top: var(--spacing-md);
  outline: 2px solid white;
  outline-offset: 2px;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(26, 26, 36, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: var(--z-sticky);
  transition: transform var(--transition-base);
}

.header.hide {
  transform: translateY(-100%);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

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

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
  align-items: center;
}

.nav-link {
  position: relative;
  padding: var(--spacing-xs) 0;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1rem;
  transition: color var(--transition-base);
}

.nav-link:hover:not(#active),
.nav-link:focus:not(#active) {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 2px;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base);
}

.nav-link:hover:not(#active)::after,
.nav-link:focus:not(#active)::after {
  transform: translateX(-50%) scaleX(1);
}

#active {
  color:  var(--text-primary);
  border-bottom: 2px solid var(--accent-primary);
  padding-bottom: calc(var(--spacing-xs) + 0.12rem);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-xs);
  background: transparent;
  border: none;
  cursor: pointer;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

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

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-left: 1px solid var(--border-color);
  padding: var(--spacing-3xl) var(--spacing-xl);
  transition: right var(--transition-slow);
  z-index: calc(var(--z-sticky) + 1);
  overflow-y: auto;
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav .nav-links {
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.mobile-nav .nav-link {
  font-size: var(--text-lg);
}

.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  z-index: var(--z-sticky);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.mobile-overlay.active {
  opacity: 1;
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-light));
  margin: var(--spacing-md) auto 0;
  border-radius: var(--radius-full);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-xl);
  font-weight: 600;
  font-size: var(--text-base);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.btn-primary {
  background: #4f46e5;
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
   background: #4338ca;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}


.btn:focus {
  outline: 3px solid var(--accent-primary);
  outline-offset: 2px;
}

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

.btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

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

/* ============================================
   CARD COMPONENT
   ============================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.card {
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 420px;
}

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

.card-thumbnail {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--bg-secondary);
  position: relative;
}

.card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-thumbnail img {
  transform: scale(1.05);
}

.card-content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.4;
  min-height: calc(1.4em * 2);
}

.card-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  min-height: calc(1.5em * 2);
  margin-bottom: auto;
}

.card-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.card-actions .btn {
  flex: 1;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-sm);
}

/* ============================================
   SKELETON LOADER
   ============================================ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.card.skeleton {
  pointer-events: none;
  border-color: transparent;
}

.card.skeleton:hover {
  transform: none;
}

.skeleton-thumbnail {
  width: 100%;
  height: 200px;
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

.skeleton-title {
  width: 80%;
  height: 24px;
  margin-bottom: var(--spacing-sm);
}

.skeleton-description {
  width: 100%;
  height: 16px;
  margin-bottom: var(--spacing-xs);
}

.skeleton-description:last-of-type {
  width: 60%;
}

.skeleton-button {
  width: 100%;
  height: 40px;
  margin-top: var(--spacing-md);
}

/* ============================================
   LOAD MORE BUTTON
   ============================================ */
.load-more-container {
  text-align: center;
  margin: var(--spacing-2xl) 0;
}

.load-more-btn {
  padding: var(--spacing-md) var(--spacing-2xl);
}

.end-message {
  text-align: center;
  color: var(--text-tertiary);
  font-style: italic;
  padding: var(--spacing-xl);
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */
.scroll-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  background: var(--accent-primary);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.8);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
  box-shadow: var(--shadow-lg);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.scroll-to-top:hover {
  background: var(--accent-hover);
  transform: scale(1.1);
}

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-slow);
  padding: var(--spacing-lg);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.9);
  transition: transform var(--transition-slow);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-base);
  z-index: 1;
}

.modal-close:hover {
  background: var(--accent-primary);
  color: white;
  transform: rotate(90deg);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
  position: fixed;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.toast {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  min-width: 300px;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transform: translateX(400px);
  opacity: 0;
  animation: toast-slide-in var(--transition-slow) forwards;
}

.toast.success {
  border-left: 4px solid #10b981;
}

.toast.error {
  border-left: 4px solid #ef4444;
}

.toast.info {
  border-left: 4px solid var(--accent-primary);
}

.toast-icon {
  font-size: var(--text-xl);
}

.toast.success .toast-icon {
  color: #10b981;
}

.toast.error .toast-icon {
  color: #ef4444;
}

.toast.info .toast-icon {
  color: var(--accent-primary);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.toast-message {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

@keyframes toast-slide-in {
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

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

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

.form-input.error,
.form-textarea.error {
  border-color: #ef4444;
}

.form-error {
  color: #ef4444;
  font-size: var(--text-sm);
  margin-top: var(--spacing-xs);
  display: none;
}

.form-error.visible {
  display: block;
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* Honeypot (hidden field) */
.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

/* ============================================
   HERO SECTION (index.html)
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-3xl) 0;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
}

.hero-shape {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
  opacity: 0.05;
  animation: float 20s ease-in-out infinite;
  will-change: transform;
}

.hero-shape:nth-child(1) {
  width: 400px;
  height: 400px;
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.hero-shape:nth-child(2) {
  width: 300px;
  height: 300px;
  top: 60%;
  right: 15%;
  animation-delay: -7s;
}

.hero-shape:nth-child(3) {
  width: 500px;
  height: 500px;
  bottom: 10%;
  left: 50%;
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  25% {
    transform: translate(30px, -30px) scale(1.1);
  }
  50% {
    transform: translate(-20px, 20px) scale(0.9);
  }
  75% {
    transform: translate(20px, 30px) scale(1.05);
  }
}

.hero-content {
  text-align: center;
  z-index: 1;
}

.profile-container {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 0 auto var(--spacing-xl);
}

.profile-rings {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-ring {
  position: absolute;
  border: 2px solid;
  border-radius: 50%;
  animation: pulse-ring 3s ease-in-out infinite;
}

.profile-ring:nth-child(1) {
  width: 100%;
  height: 100%;
  border-color: var(--accent-primary);
  opacity: 0.3;
  animation-delay: 0s;
}

.profile-ring:nth-child(2) {
  width: 115%;
  height: 115%;
  border-color: var(--accent-primary);
  opacity: 0.2;
  animation-delay: -1s;
}

.profile-ring:nth-child(3) {
  width: 125%;
  height: 125%;
  border-color: var(--accent-primary);
  opacity: 0.1;
  animation-delay: -2s;
}

@keyframes pulse-ring {
  0%, 100% {
    transform: scale(1);
    opacity: 0.3;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.1;
  }
}

.profile-image-wrapper {
  position: relative;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
  z-index: 2;
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}

.profile-image.loaded {
  display: block;
  animation: fade-in var(--transition-slow);
}


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

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  /* min-height: 2em; */
}

.typewriter-text {
  color: var(--accent-primary);
  font-weight: 600;
}

.typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent-primary);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.4rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-links {
    display: none;
  }
  
  .mobile-nav {
    display: block;
  }
  
  .mobile-overlay {
    display: block;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--text-lg);
  }
  
  .section-title {
    font-size: var(--text-3xl);
  }
  
  .scroll-to-top {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }
  
  .toast-container {
    top: var(--spacing-md);
    right: var(--spacing-md);
    left: var(--spacing-md);
  }
  
  .toast {
    min-width: auto;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
  text-align: center;
}

.hidden {
  display: none !important;
}

.invisible {
  visibility: hidden;
  opacity: 0;
}

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

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.social_icons{
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  align-items: center;
  font-size: 22px;
}
.social_icons a{
  color: rgb(175, 175, 236);
}

.social_icons a i:hover{
  color: rgb(255, 255, 255);
  transition: color 0.2s;
  
}