/* GiftCardMall Blog - Main Stylesheet */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Open Sans', Arial, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background-color: #ffffff;
    font-size: 16px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #1a365d;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
}

h2 {
    font-size: 2.25rem;
    font-weight: 700;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

a {
    color: #e53e3e;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #c53030;
    text-decoration: underline;
}

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

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    padding: 0 15px;
}

.col-12 { flex: 0 0 100%; }
.col-8 { flex: 0 0 66.666667%; }
.col-4 { flex: 0 0 33.333333%; }
.col-6 { flex: 0 0 50%; }

/* Header Styles */
.header {
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
    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 {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
}

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

.nav {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    color: white;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #e53e3e;
    text-decoration: none;
}

.cta-button {
    background: #e53e3e;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    background: #c53030;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(229, 62, 62, 0.3);
    color: white;
    text-decoration: none;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    margin-bottom: 1.5rem;
    color: #1a365d;
}

.hero p {
    font-size: 1.25rem;
    color: #4a5568;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-secondary {
    background: transparent;
    color: #1a365d;
    border: 2px solid #1a365d;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background: #1a365d;
    color: white;
    text-decoration: none;
}

/* Content Sections */
.section {
    padding: 4rem 0;
}

.section-alt {
    background: #f7fafc;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #e53e3e, #c53030);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: #1a365d;
}

.feature-card p {
    color: #4a5568;
    line-height: 1.6;
}

/* Blog Section */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.blog-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.blog-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.blog-card-content {
    padding: 1.5rem;
}

.blog-card h3 {
    margin-bottom: 0.5rem;
    color: #1a365d;
}

.blog-card p {
    color: #4a5568;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.read-more {
    color: #e53e3e;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: #c53030;
}

/* Trust Section */
.trust-section {
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.trust-section h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.trust-section p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

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

.trust-feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(229, 62, 62, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: #e53e3e;
    font-size: 1.25rem;
}

.trust-feature h4 {
    color: white;
    margin-bottom: 0.5rem;
}

.trust-feature p {
    opacity: 0.8;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: #2d3748;
    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 h4 {
    color: white;
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #a0aec0;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 1rem;
    text-align: center;
    color: #a0aec0;
    font-size: 0.9rem;
}

/* Article Styles */
.article-header {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 3rem 0;
    text-align: center;
}

.article-meta {
    color: #4a5568;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 20px;
}

.article-content h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: #1a365d;
}

.article-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: #2d3748;
}

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

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content blockquote {
    border-left: 4px solid #e53e3e;
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: #4a5568;
}

.article-content code {
    background: #f7fafc;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.article-content pre {
    background: #f7fafc;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
}

/* Sidebar */
.sidebar {
    background: #f7fafc;
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.sidebar h3 {
    margin-bottom: 1rem;
    color: #1a365d;
}

.sidebar ul {
    list-style: none;
}

.sidebar ul li {
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #e2e8f0;
}

.sidebar ul li:last-child {
    border-bottom: none;
}

.sidebar ul li a {
    color: #2d3748;
    font-weight: 500;
    transition: color 0.3s ease;
}

.sidebar ul li a:hover {
    color: #e53e3e;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 2.25rem;
    }
    
    h2 {
        font-size: 1.875rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        gap: 1rem;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section {
        padding: 2rem 0;
    }
    
    .feature-grid,
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .trust-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .col-8,
    .col-4 {
        flex: 0 0 100%;
    }
    
    .article-content {
        padding: 2rem 15px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .feature-card,
    .blog-card {
        margin: 0 10px;
    }
    
    .cta-button,
    .btn-secondary {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
}

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

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 2rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 2rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* Animation Classes */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.slide-up {
    transform: translateY(30px);
    opacity: 0;
    animation: slideUp 0.6s ease forwards;
}

@keyframes slideUp {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}