@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&display=swap'); 

:root { 
  /* Colors */
  --color-bg: #fff; 
  --color-text: #606770; 
  --color-primary: #1877f2; 
  --color-primary-hover: #165ec9; 
  --color-sidebar-bg: #f0f2f5; 
  --color-shadow: rgba(0, 0, 0, 0.1); 
  --color-rta: #1877f2; 
  --color-design: #f02849; 
  --color-others: #42b72a; 
  
  /* Layout */
  --radius: 0.75rem; 
  --transition: 0.3s cubic-bezier(.4,0,.2,1); 
  --max-width: 1200px; 
  --sidebar-width: 280px;
  --sidebar-width-mobile: 80vw;
  --sidebar-width-mobile-max: 320px;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Modal */
  --modal-bg: rgba(24, 119, 242, 0.08); 
  --modal-shadow: 0 8px 40px rgba(24,119,242,0.18); 
  
  /* Breakpoints (for reference in JS) */
  --breakpoint-sm: 480px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body { 
  margin: 0; 
  font-family: 'Poppins', sans-serif; 
  background: var(--color-bg); 
  color: var(--color-text); 
  line-height: 1.6; 
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Responsive Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 5vw, var(--font-size-5xl)); }
h2 { font-size: clamp(1.5rem, 4vw, var(--font-size-3xl)); }
h3 { font-size: clamp(1.25rem, 3vw, var(--font-size-2xl)); }
h4 { font-size: clamp(1.125rem, 2.5vw, var(--font-size-xl)); }
h5 { font-size: clamp(1rem, 2vw, var(--font-size-lg)); }
h6 { font-size: var(--font-size-base); }

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  font-size: clamp(0.875rem, 2vw, var(--font-size-base));
}

/* Responsive Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Responsive Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-lg);
}

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

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* Flexbox Utilities */
.d-flex { display: flex; }
.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.flex-grow-1 { flex-grow: 1; }

/* Grid Utilities */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Spacing Utilities */
.m-0 { margin: 0; }
.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }
.p-0 { padding: 0; }

/* Visibility Utilities */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Active project styles for submenu items */
ul.submenu a.active[data-project="rta"] {
  background-color: var(--color-rta);
  color: white;
  outline-color: var(--color-rta);
}

ul.submenu a.active[data-project="design"] {
  background-color: var(--color-design);
  color: white;
  outline-color: var(--color-design);
}

ul.submenu a.active[data-project="others"] {
  background-color: var(--color-others);
  color: white;
  outline-color: var(--color-others);
}

/* Main content */ 
main { 
  margin-left: var(--sidebar-width); 
  flex-grow: 1; 
  padding: var(--spacing-3xl) var(--spacing-2xl); 
  max-width: calc(100vw - var(--sidebar-width));
  width: 100%;
  transition: margin-left var(--transition), max-width var(--transition); 
  overflow-x: hidden;
}

/* Main content wrapper for pages with sidebar */
.main-content {
  margin-left: var(--sidebar-width);
  padding: var(--spacing-xl);
  flex: 1;
  transition: margin-left var(--transition);
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

main h1 {
  font-weight: 800;
  font-size: 3.5rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

main p.intro {
  max-width: 680px;
  font-size: 1.25rem;
  color: var(--color-text);
  margin-top: 0;
  line-height: 1.7;
}

.projects-grid {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--color-bg);
  border-radius: var(--radius);
  box-shadow: 0 5px 20px rgba(24, 119, 242, 0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  border: 1px solid #dbe9fd;
}

.project-card:hover,
.project-card:focus-visible {
  box-shadow: 0 10px 30px rgba(24, 119, 242, 0.25);
  outline: none;
}

.project-preview {
  width: 100%;
  height: 180px;
  background: #f0f4ff;
  border-bottom: 1px solid #dbe9fd;
  position: relative;
  overflow: hidden;
  border-bottom-left-radius: var(--radius);
  border-bottom-right-radius: var(--radius);
}

.project-preview iframe {
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
}

.project-info {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.project-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

.project-description {
  font-size: 1.05rem;
  color: var(--color-text);
  margin: 0;
  flex-grow: 1;
}

.dashboard-welcome {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.dashboard-welcome h1 {
  font-size: 3.8rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
  letter-spacing: 0.03em;
}

.dashboard-welcome p {
  font-size: 1.3rem;
  color: var(--color-text);
  line-height: 1.7;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.dashboard-images {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  justify-items: center;
}

.dashboard-images figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.dashboard-images img {
  width: 100%;
  max-width: 300px;
  height: 180px;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(24, 119, 242, 0.15);
  object-fit: cover;
  transition: transform 0.3s ease;
  cursor: default;
}

.dashboard-images img:hover {
  transform: scale(1.04);
}

.image-caption {
  margin-top: 0.65rem;
  font-size: 1.05rem;
  color: var(--color-text);
  font-weight: 600;
  text-align: center;
}

/* Modal styles */
.modal-backdrop {
  display: none;
  position: fixed;
  z-index: 9999;
  inset: 0;
  background: var(--modal-bg);
  backdrop-filter: blur(2px);
  transition: opacity var(--transition);
  opacity: 0;
}

.modal-backdrop.active {
  display: block;
  opacity: 1;
}

.modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.98);
  background: #fff;
  border-radius: 1.2rem;
  box-shadow: var(--modal-shadow);
  min-width: 320px;
  max-width: 95vw;
  width: 370px;
  padding: 2.2rem 2rem 1.5rem 2rem;
  transition: opacity var(--transition), transform var(--transition);
  opacity: 0;
}

.modal.active {
  display: block;
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.modal .close-modal {
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  background: none;
  border: none;
  font-size: 1.7rem;
  color: var(--color-primary);
  cursor: pointer;
  transition: color var(--transition);
  border-radius: 50%;
  width: 2.2rem;
  height: 2.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal .close-modal:hover,
.modal .close-modal:focus-visible {
  color: var(--color-design);
  background: #f0f2f5;
  outline: none;
}

.modal .modal-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  justify-content: center;
}

.modal .modal-tab {
  flex: 1;
  background: #f0f2f5;
  border: none;
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 0.7rem 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.modal .modal-tab.active {
  background: var(--color-primary);
  color: #fff;
}

.modal form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-bottom: 0.5rem;
}

.modal label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.3rem;
  text-align: left;
}

.modal input[type="text"],
.modal input[type="email"],
.modal input[type="password"] {
  width: 100%;
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  border: 1.5px solid #dbe9fd;
  font-size: 1rem;
  background: #f8faff;
  transition: border var(--transition), box-shadow var(--transition);
}

.modal input:focus {
  border: 1.5px solid var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 2px #d5e3fc;
}

.modal .modal-action-btn {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.8rem 0;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  box-shadow: 0 2px 8px var(--color-shadow);
}

.modal .modal-action-btn:hover,
.modal .modal-action-btn:focus-visible {
  background: var(--color-primary-hover);
  transform: translateY(-2px) scale(1.04);
  outline: none;
}

.modal .modal-footer {
  text-align: center;
  font-size: 0.98rem;
  color: var(--color-text);
  margin-top: 0.7rem;
}

.modal .modal-footer a {
  color: var(--color-primary);
  text-decoration: underline;
  cursor: pointer;
  font-weight: 600;
  margin-left: 0.3rem;
}

.modal .modal-footer a:hover {
  color: var(--color-primary-hover);
}

/* Footer styles */
.footer {
  background: var(--color-sidebar-bg);
  padding: var(--spacing-lg) var(--spacing-xl);
  text-align: center;
  color: var(--color-text);
  border-top: 1px solid #e0e0e0;
  margin-top: auto;
  font-size: var(--font-size-sm);
}

.footer a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* App footer for specific pages */
.app-footer {
  margin-top: auto;
  text-align: center;
  padding: var(--spacing-lg) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  border-top: 1px solid #e0e0e0;
}

.app-footer a {
  color: var(--color-primary);
  text-decoration: none;
}

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

/* Content wrapper to ensure proper footer positioning */
.content-scrollable {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Responsive styles */

/* Large screens */
@media (min-width: 1200px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
  
  main {
    padding: var(--spacing-3xl) var(--spacing-3xl);
  }
}

/* Medium-large screens */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }
  
  main {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
  
  .main-content {
    padding: var(--spacing-lg);
  }
  
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* Medium screens */
@media (max-width: 900px) {
  .dashboard-welcome h1 {
    font-size: clamp(1.75rem, 5vw, 2.2rem);
  }
  
  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
  }
  
  .dashboard-images {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
  }
}

/* Tablet and small desktop */
@media (max-width: 768px) {
  :root {
    --sidebar-width: var(--sidebar-width-mobile);
  }
  
  .sidebar {
    left: -100vw;
    width: var(--sidebar-width-mobile);
    max-width: var(--sidebar-width-mobile-max);
    height: 100vh;
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md) var(--spacing-lg);
    box-shadow: 2px 0 16px var(--color-shadow);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    gap: var(--spacing-lg);
    transition: left var(--transition);
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .hamburger {
    display: flex;
  }
  
  main {
    margin-left: 0;
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 100vw;
  }
  
  .main-content {
    margin-left: 0;
    padding: var(--spacing-md);
  }
  
  .dashboard-images {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
  }
  
  .modal {
    min-width: 90vw;
    width: 95vw;
    padding: var(--spacing-lg) var(--spacing-sm) var(--spacing-lg) var(--spacing-sm);
  }
  
  /* Hide desktop-only elements */
  .d-md-none {
    display: none;
  }
  
  /* Show mobile-only elements */
  .d-md-block {
    display: block;
  }
  
  /* Responsive tables */
  .table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  table {
    min-width: 600px;
  }
  
  /* Stack form elements */
  .form-row {
    flex-direction: column;
  }
  
  .form-row > * {
    width: 100% !important;
    margin-bottom: var(--spacing-sm);
  }
}

/* Mobile phones */
@media (max-width: 480px) {
  :root {
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
  }
  
  .sidebar {
    width: 85vw;
    max-width: 300px;
    padding: var(--spacing-md) var(--spacing-sm) var(--spacing-sm) var(--spacing-md);
  }
  
  main {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .main-content {
    padding: var(--spacing-sm);
  }
  
  .modal {
    min-width: 95vw;
    width: 98vw;
    padding: var(--spacing-md) var(--spacing-xs) var(--spacing-md) var(--spacing-xs);
    margin: var(--spacing-sm);
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .dashboard-images {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  /* Mobile-specific utilities */
  .d-sm-none {
    display: none;
  }
  
  .d-sm-block {
    display: block;
  }
  
  /* Touch-friendly buttons */
  button, .btn, input[type="submit"], input[type="button"] {
    min-height: 44px;
    min-width: 44px;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  /* Larger tap targets */
  a, button, input, select, textarea {
    min-height: 44px;
  }
  
  /* Prevent zoom on input focus */
  input, select, textarea {
    font-size: 16px;
  }
}

/* Extra small screens */
@media (max-width: 360px) {
  .sidebar {
    width: 90vw;
    max-width: 280px;
  }
  
  .container {
    padding: 0 var(--spacing-xs);
  }
  
  main {
    padding: var(--spacing-md) var(--spacing-xs);
  }
  
  .main-content {
    padding: var(--spacing-xs);
  }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Optimize for high DPI displays */
  .sidebar {
    box-shadow: 1px 0 8px var(--color-shadow);
  }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
  .sidebar {
    width: 60vw;
    max-width: 280px;
  }
  
  main {
    padding: var(--spacing-md);
  }
}

/* Print styles */
@media print {
  .sidebar,
  .hamburger,
  .modal,
  .modal-backdrop {
    display: none !important;
  }
  
  main,
  .main-content {
    margin-left: 0 !important;
    padding: 0 !important;
    max-width: 100% !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a1a;
    --color-text: #e0e0e0;
    --color-sidebar-bg: #2d2d2d;
    --color-shadow: rgba(0, 0, 0, 0.3);
  }
}

/* Email Verification Modal Styles */
#verification-modal .modal-header {
    text-align: center;
    margin-bottom: 20px;
}

#verification-modal .modal-header h2 {
    margin: 0 0 10px 0;
    color: #333;
}

#verification-modal .modal-header p {
    margin: 0;
    color: #666;
    font-size: 14px;
}

#verification-code {
    text-align: center !important;
    letter-spacing: 3px !important;
    font-size: 18px !important;
    font-weight: bold;
}

.modal-action-btn.secondary {
    background-color: #6c757d;
    border-color: #6c757d;
}

.modal-action-btn.secondary:hover {
    background-color: #545b62;
    border-color: #4e555b;
}

.modal-action-btn:disabled {
    background-color: #ccc;
    border-color: #ccc;
    cursor: not-allowed;
}

.verification-message {
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 14px;
}

.verification-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.verification-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.verification-message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

#resend-countdown {
    font-size: 12px;
    color: #999;
}