/*
Modern Design System for IFSC Code Website
Using a clean, professional color palette with excellent accessibility
*/

/* CSS Custom Properties (Variables) for consistent design */
:root {
  /* Primary Colors */
  --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 Colors */
  --secondary-50: #f0f9ff;
  --secondary-100: #e0f2fe;
  --secondary-200: #bae6fd;
  --secondary-300: #7dd3fc;
  --secondary-400: #38bdf8;
  --secondary-500: #0ea5e9;
  --secondary-600: #0284c7;
  --secondary-700: #0369a1;
  --secondary-800: #075985;
  --secondary-900: #0c4a6e;
  
  /* Neutral Colors */
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  
  /* Success Colors */
  --success-50: #f0fdf4;
  --success-100: #dcfce7;
  --success-200: #bbf7d0;
  --success-300: #86efac;
  --success-400: #4ade80;
  --success-500: #22c55e;
  --success-600: #16a34a;
  --success-700: #15803d;
  --success-800: #166534;
  --success-900: #14532d;
  
  /* Warning Colors */
  --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 Colors */
  --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;
  
  /* Spacing Scale */
  --spacing-0: 0rem;
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-7: 1.75rem;
  --spacing-8: 2rem;
  --spacing-9: 2.25rem;
  --spacing-10: 2.5rem;
  --spacing-11: 2.75rem;
  --spacing-12: 3rem;
  --spacing-14: 3.5rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  --spacing-28: 7rem;
  --spacing-32: 8rem;
  --spacing-36: 9rem;
  --spacing-40: 10rem;
  --spacing-44: 11rem;
  --spacing-48: 12rem;
  --spacing-52: 13rem;
  --spacing-56: 14rem;
  --spacing-60: 15rem;
  --spacing-64: 16rem;
  --spacing-72: 18rem;
  --spacing-80: 20rem;
  --spacing-96: 24rem;
  
  /* Typography Scale */
  --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;
  --font-size-6xl: 3.75rem;
  --font-size-7xl: 4.5rem;
  --font-size-8xl: 6rem;
  --font-size-9xl: 8rem;
  
  /* Font Weights */
  --font-weight-thin: 100;
  --font-weight-extralight: 200;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;
  --radius-base: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  
  /* Transitions */
  --transition-all: all 0.2s ease-in-out;
  --transition-colors: color 0.2s ease-in-out;
  --transition-bg: background-color 0.2s ease-in-out;
  --transition-border: border-color 0.2s ease-in-out;
  --transition-opacity: opacity 0.2s ease-in-out;
  --transition-transform: transform 0.2s ease-in-out;
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--neutral-50);
  color: var(--neutral-800);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--neutral-900);
}

h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-4);
}

h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-3);
}

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

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-1);
}

h6 {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-1);
}

p {
  margin: 0 0 var(--spacing-4);
  color: var(--neutral-700);
}

/* Links */
a {
  color: var(--primary-600);
  text-decoration: none;
  transition: var(--transition-colors);
}

a:hover {
  color: var(--primary-800);
  text-decoration: underline;
}

/* Buttons - shadcn-inspired */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-semibold);
  transition: var(--transition-all);
  cursor: pointer;
  outline: none;
  border: none;
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-base);
  line-height: 1.25rem;
}

.btn:focus-visible {
  box-shadow: 0 0 0 2px var(--neutral-50), 0 0 0 4px var(--primary-500);
}

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

.btn-primary:hover {
  background-color: var(--primary-700);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--secondary-600);
  color: white;
}

.btn-secondary:hover {
  background-color: var(--secondary-700);
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--neutral-300);
  color: var(--neutral-700);
}

.btn-outline:hover {
  background-color: var(--neutral-100);
  border-color: var(--neutral-400);
}

.btn-ghost {
  background-color: transparent;
  color: var(--neutral-700);
}

.btn-ghost:hover {
  background-color: var(--neutral-100);
}

.btn-sm {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-sm);
  line-height: 1rem;
}

.btn-lg {
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-lg);
  line-height: 1.5rem;
}

/* Cards - shadcn-inspired */
.card {
  background-color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-base);
  transition: var(--transition-all);
  overflow: hidden;
}

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

.card-header {
  padding: var(--spacing-5) var(--spacing-6);
  border-bottom: 1px solid var(--neutral-200);
}

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

.card-description {
  color: var(--neutral-500);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-1);
}

.card-content {
  padding: var(--spacing-5) var(--spacing-6);
}

.card-footer {
  padding: var(--spacing-5) var(--spacing-6);
  border-top: 1px solid var(--neutral-200);
}

/* Inputs - shadcn-inspired */
.input {
  display: block;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--neutral-300);
  background-color: white;
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--font-size-base);
  transition: var(--transition-all);
}

.input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.input::placeholder {
  color: var(--neutral-400);
}

/* Container */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

@media (min-width: 640px) {
  .container {
    max-width: 640px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 768px;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 1024px;
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: 1280px;
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-4);
}

.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);
}

@media (min-width: 640px) {
  .sm\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .md\:grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

/* Flexbox Utilities */
.flex {
  display: flex;
}

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

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

.justify-between {
  justify-content: space-between;
}

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

.gap-2 {
  gap: var(--spacing-2);
}

.gap-4 {
  gap: var(--spacing-4);
}

.gap-6 {
  gap: var(--spacing-6);
}

/* Margin & Padding Utilities */
.m-0 {
  margin: 0;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.my-4 {
  margin-top: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.my-6 {
  margin-top: var(--spacing-6);
  margin-bottom: var(--spacing-6);
}

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

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

.mt-4 {
  margin-top: var(--spacing-4);
}

.mt-6 {
  margin-top: var(--spacing-6);
}

.p-4 {
  padding: var(--spacing-4);
}

.p-6 {
  padding: var(--spacing-6);
}

.px-4 {
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.py-2 {
  padding-top: var(--spacing-2);
  padding-bottom: var(--spacing-2);
}

.py-4 {
  padding-top: var(--spacing-4);
  padding-bottom: var(--spacing-4);
}

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

.text-sm {
  font-size: var(--font-size-sm);
}

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

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

.font-medium {
  font-weight: var(--font-weight-medium);
}

.font-semibold {
  font-weight: var(--font-weight-semibold);
}

/* Color Utilities */
.text-primary {
  color: var(--primary-600);
}

.text-secondary {
  color: var(--secondary-600);
}

.text-muted {
  color: var(--neutral-500);
}

.bg-primary {
  background-color: var(--primary-600);
}

.bg-secondary {
  background-color: var(--secondary-600);
}

.bg-muted {
  background-color: var(--neutral-100);
}

/* Layout Components */
.header {
  background-color: white;
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  width: 100%;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) var(--spacing-0);
  flex-wrap: wrap;
}

.nav-links {
  display: flex;
  gap: var(--spacing-6);
  align-items: center;
  flex-wrap: wrap;
}

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--neutral-700);
  transition: var(--transition-colors);
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
}

.nav-link:hover {
  color: var(--primary-600);
  text-decoration: none;
  background-color: var(--neutral-100);
}

.footer {
  background-color: var(--neutral-900);
  color: var(--neutral-200);
  padding: var(--spacing-8) var(--spacing-0);
  margin-top: var(--spacing-12);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-6);
  justify-content: center;
}

.footer-link {
  color: var(--neutral-300);
  transition: var(--transition-colors);
}

.footer-link:hover {
  color: white;
  text-decoration: none;
}

.copyright {
  text-align: center;
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--neutral-800);
  color: var(--neutral-400);
  font-size: var(--font-size-sm);
}

/* Ad Banner */
.ad-banner {
  background-color: var(--neutral-100);
  border: 1px dashed var(--neutral-300);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  margin: var(--spacing-4) var(--spacing-0);
}

.ad-placeholder {
  color: var(--neutral-500);
  font-size: var(--font-size-sm);
  text-align: center;
}

/* Responsive Utilities */
@media (min-width: 768px) {
  .md\:flex {
    display: flex;
  }
  
  .md\:hidden {
    display: none;
  }
  
  .md\:block {
    display: block;
  }
  
  .md\:flex-row {
    flex-direction: row;
  }
  
  .md\:items-center {
    align-items: center;
  }
  
  .md\:justify-between {
    justify-content: space-between;
  }
}

@media (max-width: 767px) {
  .header {
    /* Ensure header is not sticky on mobile either */
  }
  
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: var(--spacing-2);
    margin-top: var(--spacing-4);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .hidden {
    display: none;
  }
  
  .sm\:block {
    display: block;
  }
  
  .sm\:hidden {
    display: none;
  }
}

/* Desktop Navigation Improvements */
@media (min-width: 768px) {
  .navbar {
    flex-wrap: nowrap;
  }
  
  .nav-links {
    flex-wrap: nowrap;
  }
  
  .nav-link {
    white-space: nowrap;
  }
}

/* Mobile Menu */
.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--neutral-700);
  cursor: pointer;
  padding: var(--spacing-1);
  border-radius: var(--radius-md);
}

.mobile-menu-button:hover {
  background-color: var(--neutral-100);
}

@media (max-width: 767px) {
  .mobile-menu-button {
    display: block;
  }
  
  .overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-all);
  }
  
  .overlay.active {
    opacity: 1;
    visibility: visible;
  }
}

/* Search Box */
.search-box {
  position: relative;
  max-width: 500px;
  width: 100%;
  margin: var(--spacing-6) auto;
}

.search-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  padding-left: var(--spacing-10);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  transition: var(--transition-all);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.search-icon {
  position: absolute;
  left: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--neutral-400);
  z-index: 1;
}

/* Bank List */
.bank-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bank-item {
  margin-bottom: 0.5rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.bank-item.animated {
  animation: fadeInUp 0.6s ease-out forwards;
}

/* Fallback to ensure bank items are visible */
.bank-item:not(.animated) {
  opacity: 1;
  transform: translateY(0);
}

.bank-link {
  display: block;
  padding: 1rem;
  background-color: white;
  border: 1px solid #e2e8f0;
  border-radius: 0.5rem;
  transition: all 0.2s ease-in-out;
  color: #1e293b;
  font-weight: 500;
}

.bank-link:hover {
  background-color: #f1f5f9;
  border-color: #cbd5e1;
  text-decoration: none;
  transform: translateX(4px);
}

/* Animation for elements when they come into view */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  color: white;
  padding: var(--spacing-12) var(--spacing-0);
  text-align: center;
  margin-bottom: var(--spacing-8);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
  transform: rotate(30deg);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-0) var(--spacing-4);
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-4);
  color: white;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-6);
  color: var(--primary-100);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Section Spacing */
.section {
  padding: var(--spacing-8) var(--spacing-0);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.section-title h2 {
  font-size: var(--font-size-3xl);
  color: var(--neutral-900);
  margin-bottom: var(--spacing-2);
}

.section-title p {
  color: var(--neutral-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Utility Classes */
.rounded-full {
  border-radius: var(--radius-full);
}

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

.transition-all {
  transition: var(--transition-all);
}

.cursor-pointer {
  cursor: pointer;
}

.w-full {
  width: 100%;
}

.max-w-screen-xl {
  max-width: 1280px;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* Responsive Adjustments */
@media (max-width: 639px) {
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  h2 {
    font-size: var(--font-size-2xl);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .section {
    padding: var(--spacing-6) var(--spacing-0);
  }
}

/* Accessibility */
.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\:outline-none:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
}

.focus\:ring-2:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
}

.focus\:ring:focus {
  --tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);
  --tw-ring-shadow: var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color);
  box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow, 0 0 #0000);
}

.focus\:ring-primary-500:focus {
  --tw-ring-opacity: 1;
  --tw-ring-color: rgba(59, 130, 246, var(--tw-ring-opacity));
}