/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo a {
    color: white;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
}

.logo img {
    background: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    color: #667eea;
}

/* Navigation Styles */
nav .desktop-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav .desktop-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

nav .desktop-menu a:hover,
nav .desktop-menu a.active {
    color: #fbbf24;
}

nav .desktop-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #fbbf24;
}

/* Mobile Menu Styles */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    transition: 0.3s;
}

.mobile-menu {
    display: none;
    background: #667eea;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.mobile-menu ul {
    list-style: none;
    padding: 1rem;
}

.mobile-menu a {
    color: white;
    text-decoration: none;
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    transition: transform 0.3s ease;
}

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Content Sections */
.content-section {
    padding: 4rem 0;
    background: white;
}

.content-section:nth-child(even) {
    background: #f8fafc;
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.last-updated {
    background: #e0e7ff;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border-left: 4px solid #667eea;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2rem;
    color: #1f2937;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    color: #374151;
    margin-top: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: #4b5563;
}

ul, ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
    color: #4b5563;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.btn-secondary:hover {
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.4);
}

/* Cards and Boxes */
.info-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    border-left: 4px solid #667eea;
}

.warning-card {
    background: #fef3cd;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #fbbf24;
    margin: 1.5rem 0;
}

.success-card {
    background: #d1fae5;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #10b981;
    margin: 1.5rem 0;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

input, textarea, select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

th {
    background: #f9fafb;
    font-weight: 600;
    color: #374151;
}

tr:hover {
    background: #f9fafb;
}

/* Contact Info */
.contact-info {
    background: #f3f4f6;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.contact-info p {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #fbbf24;
}

.footer-section p {
    color: #d1d5db;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Steps Section */
.steps-section {
    margin: 3rem 0;
}

.step {
    display: flex;
    gap: 1.5rem;
    margin: 2rem 0;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.step-number {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h3 {
    margin-top: 0;
    color: #1f2937;
}

/* Balance Checker Form */
.balance-checker {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin: 2rem 0;
}

.input-group {
    display: flex;
    gap: 1rem;
    align-items: end;
}

.input-group .form-group {
    flex: 1;
    margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    nav .desktop-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu.active {
        display: block;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-features {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 2rem;
    }

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

    .step {
        flex-direction: column;
        text-align: center;
    }

    .input-group {
        flex-direction: column;
    }

    .input-group .form-group {
        margin-bottom: 1rem;
    }

    h2 {
        font-size: 1.5rem;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }

    .content-section {
        padding: 2rem 0;
    }

    .page-header {
        padding: 2rem 0;
    }

    .feature-card,
    .info-card,
    .balance-checker {
        padding: 1.5rem;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}