/* ========================================
   GLOBAL MODERN DESIGN SYSTEM
   World-Class Responsive Design
   ======================================== */

:root {
  /* Color Palette */
  --primary: #8B0000;
  --primary-light: #B22222;
  --primary-dark: #5C0000;
  --secondary: #1a1a2e;
  --accent: #FF6B35;
  --accent-light: #FFB347;
  --success: #2ecc71;
  --warning: #f39c12;
  --danger: #e74c3c;
  --info: #3498db;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #8B0000 0%, #B22222 100%);
  --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --gradient-light: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  
  /* Neutral Colors */
  --bg-dark: #0f1419;
  --bg-lighter: #1a1a2e;
  --bg-light: #f8f9fa;
  --text-dark: #1a1a2e;
  --text-light: #ffffff;
  --text-muted: #6c757d;
  --border-color: #e9ecef;
  
  /* 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;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  
  /* Shadows */
  --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);
  --shadow-hover: 0 15px 40px rgba(139,0,0,0.2);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --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: 2rem;
  --font-size-4xl: 2.5rem;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   RESET & NORMALIZE
   ======================================== */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-light);
  overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

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

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.015em;
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-muted);
  line-height: 1.8;
}

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

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

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
  color: var(--text-light);
  padding: var(--spacing-md) var(--spacing-lg);
  box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 3px solid linear-gradient(90deg, #f093fb 0%, #00f2fe 100%);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

header .logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

header .logo img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.9);
  object-fit: cover;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 0 15px rgba(240, 147, 251, 0.4);
}

header .logo img:hover {
  transform: scale(1.05) rotate(5deg);
}

nav ul {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

nav ul li a {
  color: var(--text-light);
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #f093fb 0%, #00f2fe 100%);
  transition: width var(--transition-base);
  border-radius: var(--radius-sm);
}

nav ul li a:hover::after {
  width: 100%;
}

nav ul li a:hover {
  background: rgba(255,255,255,0.15);
  color: #00f2fe;
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
}

.menu-icon {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 6px;
}

.menu-icon div {
  width: 28px;
  height: 3px;
  background: var(--text-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

/* Desktop navigation menu - always visible on desktop */
.nav-menu {
  display: flex;
  align-items: center;
}

.nav-menu ul {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-menu a {
  color: var(--text-dark);
  text-decoration: none;
  transition: all var(--transition-base);
}

/* ========================================
   CONTAINERS & SECTIONS
   ======================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

section {
  padding: var(--spacing-3xl) var(--spacing-lg);
}

section.hero {
  background: var(--gradient-dark);
  color: var(--text-light);
  padding: var(--spacing-3xl) var(--spacing-lg);
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

section.hero .hero-content {
  max-width: 800px;
  text-align: center;
}

section.hero h1 {
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.6s ease;
}

section.hero p {
  color: rgba(255,255,255,0.9);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
}

/* ========================================
   CARDS & BOXES
   ======================================== */

.card {
  background: var(--text-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-color);
}

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

.card.gradient {
  background: var(--gradient-primary);
  color: var(--text-light);
  border: none;
}

.card.dark {
  background: var(--bg-lighter);
  color: var(--text-light);
}

/* ========================================
   BUTTONS
   ======================================== */

button, .btn, input[type="submit"] {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: none;
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-primary, button[type="submit"] {
  background: var(--gradient-primary);
  color: var(--text-light);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover, button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background: var(--primary);
  color: var(--text-light);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--text-light);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========================================
   FORMS
   ======================================== */

form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-xl);
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-dark);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input, textarea, select {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  background: var(--bg-light);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139,0,0,0.1);
  background: var(--text-light);
}

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

.input-icon {
  position: relative;
}

.input-icon i {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* ========================================
   TABLES
   ======================================== */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--text-light);
}

thead {
  background: var(--gradient-primary);
  color: var(--text-light);
}

th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: var(--font-size-sm);
}

td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

tbody tr {
  transition: background-color var(--transition-fast);
}

tbody tr:hover {
  background: rgba(139,0,0,0.05);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* ========================================
   ALERTS & NOTIFICATIONS
   ======================================== */

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid;
  animation: slideInDown 0.3s ease;
}

.alert-success {
  background: rgba(46,204,113,0.1);
  color: #27ae60;
  border-left-color: #2ecc71;
}

.alert-error, .alert-danger {
  background: rgba(231,76,60,0.1);
  color: #c0392b;
  border-left-color: #e74c3c;
}

.alert-warning {
  background: rgba(243,156,18,0.1);
  color: #d68910;
  border-left-color: #f39c12;
}

.alert-info {
  background: rgba(52,152,219,0.1);
  color: #2980b9;
  border-left-color: #3498db;
}

/* ========================================
   RESPONSIVE GRID
   ======================================== */

.grid {
  display: grid;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

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

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

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

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

.flex {
  display: flex;
  gap: var(--spacing-md);
}

.flex-col {
  flex-direction: column;
}

.flex-center {
  align-items: center;
  justify-content: center;
}

.flex-between {
  align-items: center;
  justify-content: space-between;
}

/* ========================================
   ANIMATIONS
   ======================================== */

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

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

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

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

footer {
  background: var(--gradient-dark);
  color: var(--text-light);
  padding: var(--spacing-2xl) var(--spacing-lg);
  margin-top: var(--spacing-3xl);
  border-top: 3px solid var(--accent);
}

footer .footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

footer h4 {
  color: var(--accent-light);
  margin-bottom: var(--spacing-md);
}

footer ul {
  list-style: none;
}

footer ul li {
  margin-bottom: var(--spacing-sm);
}

footer ul li a {
  color: rgba(255,255,255,0.8);
  transition: color var(--transition-base);
}

footer ul li a:hover {
  color: var(--accent);
  text-decoration: none;
}

footer .footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-xl);
  text-align: center;
  color: rgba(255,255,255,0.7);
  font-size: var(--font-size-sm);
}

/* ========================================
   MOBILE RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.25rem;
  }

  body {
    overflow-x: hidden !important;
    width: 100%;
  }

  header {
    width: 100%;
    padding: clamp(0.8rem, 2vw, 1rem) var(--spacing-md);
  }

  header .logo {
    flex-shrink: 0;
    gap: clamp(0.5rem, 1vw, 0.8rem);
  }

  header .logo img {
    width: clamp(35px, 8vw, 45px);
    height: clamp(35px, 8vw, 45px);
    filter: brightness(0) invert(1);
  }

  header .logo h1 {
    font-size: clamp(0.9rem, 2.5vw, 1.2rem);
  }

  header .container {
    padding: 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  nav ul {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--primary-dark);
    padding: var(--spacing-md);
    border-radius: 0;
    width: 100%;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    z-index: 999;
  }

  nav ul.active,
  nav ul.show {
    display: flex;
  }

  nav ul li a {
    padding: clamp(0.8rem, 2vw, 1rem);
    font-size: clamp(0.85rem, 2.5vw, 1rem);
  }

  /* Mobile menu toggle - show when nav-menu has active class */
  .nav-menu {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--primary-dark);
    padding: var(--spacing-md);
    width: 100%;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    z-index: 999;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu ul {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .menu-icon,
  .hamburger {
    display: flex;
    margin-left: auto;
  }

  section {
    padding: var(--spacing-2xl) var(--spacing-md);
    width: 100%;
    box-sizing: border-box;
  }

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

  .card {
    padding: var(--spacing-lg);
  }

  h1 {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }

  h3 {
    font-size: var(--font-size-lg);
  }

  table {
    font-size: var(--font-size-sm);
  }

  th, td {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .container {
    padding: 0 var(--spacing-md);
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    margin: 0;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xl: 1.5rem;
    --spacing-lg: 1rem;
    --font-size-base: 0.95rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.3rem;
    --font-size-2xl: 1.1rem;
  }

  * {
    box-sizing: border-box;
  }

  body {
    width: 100%;
    overflow-x: hidden !important;
    padding: 0;
    margin: 0;
  }

  header {
    width: 100vw;
    padding: 0.7rem 0.8rem;
    margin: 0;
  }

  header .logo {
    gap: 0.5rem;
    min-width: fit-content;
  }

  header .logo img {
    width: 35px;
    height: 35px;
    filter: brightness(0) invert(1);
  }

  header .logo h1 {
    font-size: clamp(0.8rem, 2vw, 0.95rem);
    letter-spacing: -0.02em;
  }

  .menu-icon,
  .hamburger {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
  }

  .menu-icon div,
  .hamburger div {
    width: 20px;
    height: 2px;
  }

  header {
    width: 100vw;
    padding: 0;
    margin: 0;
  }

  header .container {
    padding: 0.7rem 0.8rem;
    width: 100%;
    max-width: none;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
  }

  header .logo {
    font-size: var(--font-size-sm);
    min-width: fit-content;
  }

  header .logo img {
    width: 35px;
    height: 35px;
  }

  header .logo span {
    font-size: clamp(0.8rem, 2vw, 0.95rem);
  }

  .menu-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
  }

  .menu-icon div {
    width: 20px;
    height: 2px;
  }

  .nav-menu {
    width: 100%;
    left: 0;
    right: 0;
  }

  .nav-menu a {
    padding: 0.7rem 1rem !important;
    font-size: 0.85rem !important;
  }

  .btn {
    width: 100%;
    padding: 0.7rem 1.2rem !important;
    font-size: 0.85rem !important;
  }

  form {
    margin: 0;
    padding: 0 var(--spacing-md);
  }

  section {
    padding: clamp(1.5rem, 5vh, 2.5rem) var(--spacing-md);
    width: 100%;
    box-sizing: border-box;
    margin: 0;
  }

  section.hero {
    min-height: 60vh;
    padding: clamp(1.5rem, 6vh, 3rem) 0.8rem;
    width: 100%;
    box-sizing: border-box;
  }

  footer {
    width: 100%;
    box-sizing: border-box;
  }

  footer .footer-content {
    grid-template-columns: 1fr;
  }

  .container {
    width: 100%;
    max-width: none;
    padding: 0 var(--spacing-md);
    box-sizing: border-box;
    margin: 0;
  }

  /* Ensure no horizontal overflow */
  main, article, aside, nav {
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
  }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

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

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

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-md); }
.p-2 { padding: var(--spacing-lg); }
.p-3 { padding: var(--spacing-xl); }

.rounded { border-radius: var(--radius-lg); }
.rounded-full { border-radius: 9999px; }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.hidden { display: none !important; }
.visible { display: block !important; }

.no-scroll {
  overflow: hidden !important;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.max-w-md {
  max-width: 450px;
}

.max-w-lg {
  max-width: 600px;
}

.max-w-xl {
  max-width: 800px;
}