/* ===================================
   EMATHRIX TECHNOLOGIES - MAIN STYLESHEET
   Blue & Indigo Theme
   =================================== */

:root {
    --blue-900: #0A0660;
    --blue-800: #12088F;
    --blue-700: #2835AF;
    --blue-600: #4361EE;
    --blue-500: #4895EF;
    --blue-400: #4CC9F0;
    --blue-300: #7DD8F5;
    --blue-200: #ADE5F9;
    --blue-100: #D6F1FC;
    --blue-50: #ECF8FE;
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-900: #111827;
    --green-100: #D1FAE5;
    --green-500: #10B981;
    --green-800: #065F46;
    --red-100: #FEE2E2;
    --red-500: #EF4444;
    --red-800: #991B1B;
    --yellow-100: #FEF3C7;
    --yellow-500: #F59E0B;
    --yellow-800: #92400E;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(10,6,96,0.2);
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --max-width: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-family); background: var(--gray-50); color: var(--gray-900); line-height: 1.6; font-size: 16px; }
a { color: var(--blue-600); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--blue-500); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* Container */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* Grid */
.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }
@media (min-width: 769px) and (max-width: 1024px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }

/* Typography */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; color: var(--gray-900); }
h1 { font-size: 2.5rem; } h2 { font-size: 2rem; } h3 { font-size: 1.5rem; } h4 { font-size: 1.25rem; }
.section-title { text-align: center; margin-bottom: 0.5rem; color: var(--blue-900); }
.section-subtitle { text-align: center; color: var(--gray-600); max-width: 600px; margin: 0 auto 3rem; font-size: 1.1rem; }

/* Navbar */
.navbar { background: var(--blue-900); color: var(--white); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.navbar .container { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.navbar-brand { display: flex; align-items: center; gap: 0.5rem; font-size: 1.5rem; font-weight: 800; color: var(--white); letter-spacing: 2px; }
.navbar-brand:hover { color: var(--blue-300); }
.navbar-brand img { height: 45px; width: auto; }
.navbar-links { display: flex; align-items: center; gap: 2rem; }
.navbar-links a { color: var(--blue-200); font-weight: 500; font-size: 0.95rem; }
.navbar-links a:hover { color: var(--white); }
.navbar-links .btn-nav { background: var(--blue-500); color: var(--white); padding: 0.5rem 1.25rem; border-radius: var(--radius); font-weight: 600; }
.navbar-links .btn-nav:hover { background: var(--blue-400); color: var(--white); }
.mobile-menu-btn { display: none; background: none; border: none; color: var(--white); font-size: 1.5rem; cursor: pointer; padding: 0.5rem; }
.mobile-menu { display: none; background: var(--blue-800); padding: 1rem 1.5rem; }
.mobile-menu a { display: block; color: var(--blue-200); padding: 0.75rem 0; border-bottom: 1px solid var(--blue-700); font-weight: 500; }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--white); }
.mobile-menu.active { display: block; }
@media (max-width: 768px) { .navbar-links { display: none; } .mobile-menu-btn { display: block; } }

/* Buttons */
.btn { display: inline-block; padding: 0.75rem 1.75rem; border-radius: var(--radius); font-weight: 600; font-size: 1rem; cursor: pointer; border: none; transition: all 0.3s ease; text-align: center; font-family: var(--font-family); }
.btn-primary { background: var(--blue-700); color: var(--white); }
.btn-primary:hover { background: var(--blue-600); color: var(--white); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(67,97,238,0.35); }
.btn-secondary { background: transparent; color: var(--white); border: 2px solid var(--white); }
.btn-secondary:hover { background: var(--white); color: var(--blue-900); }
.btn-outline { background: transparent; color: var(--blue-700); border: 2px solid var(--blue-700); }
.btn-outline:hover { background: var(--blue-700); color: var(--white); }
.btn-sm { padding: 0.4rem 1rem; font-size: 0.875rem; }
.btn-danger { background: var(--red-500); color: var(--white); }
.btn-danger:hover { background: #DC2626; color: var(--white); }
.btn-success { background: var(--green-500); color: var(--white); }
.btn-success:hover { background: #059669; color: var(--white); }

/* Hero */
.hero { background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 100%); color: var(--white); padding: 6rem 0; text-align: center; }
.hero h1 { color: var(--white); font-size: 3rem; margin-bottom: 1.5rem; font-weight: 800; }
.hero p { font-size: 1.25rem; color: var(--blue-200); max-width: 700px; margin: 0 auto 2.5rem; line-height: 1.7; }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero-sm { padding: 3.5rem 0; }
.hero-sm h1 { font-size: 2.25rem; margin-bottom: 0.75rem; }
.hero-sm p { font-size: 1.1rem; margin-bottom: 0; }
@media (max-width: 768px) { .hero h1 { font-size: 2rem; } .hero p { font-size: 1rem; } .hero { padding: 4rem 0; } }

/* Sections */
.section { padding: 5rem 0; }
.section-light { background: var(--white); }
.section-gray { background: var(--gray-50); }
.section-blue-light { background: linear-gradient(135deg, var(--blue-50) 0%, var(--blue-100) 100%); }
.section-blue-dark { background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-800) 100%); color: var(--white); }
.section-blue-dark h2, .section-blue-dark h3 { color: var(--white); }
.section-blue-dark p { color: var(--blue-200); }

/* Cards */
.card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-body { padding: 1.75rem; }
.card-img { width: 100%; height: 200px; object-fit: cover; background: var(--blue-100); }
.card-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; color: var(--blue-900); }
.card-text { color: var(--gray-600); font-size: 0.95rem; line-height: 1.6; }
.card-link { display: inline-block; margin-top: 1rem; color: var(--blue-600); font-weight: 600; }
.card-link:hover { color: var(--blue-500); }
.card-icon { width: 60px; height: 60px; background: var(--blue-100); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem; color: var(--blue-700); font-size: 1.5rem; }

/* Badge */
.badge { display: inline-block; padding: 0.25rem 0.75rem; border-radius: 50px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.badge-blue { background: var(--blue-100); color: var(--blue-700); }
.badge-green { background: var(--green-100); color: var(--green-800); }
.badge-red { background: var(--red-100); color: var(--red-800); }
.badge-yellow { background: var(--yellow-100); color: var(--yellow-800); }
.badge-gray { background: var(--gray-200); color: var(--gray-700); }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; text-align: center; }
.stat-item h3 { font-size: 2.5rem; font-weight: 800; color: var(--white); margin-bottom: 0.5rem; }
.stat-item p { font-size: 1rem; color: var(--blue-300); font-weight: 500; }
@media (max-width: 768px) { .stats-grid { grid-template-columns: 1fr; gap: 1.5rem; } }

/* Testimonials */
.testimonial-card { background: var(--white); border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow); border-left: 4px solid var(--blue-500); }
.testimonial-content { font-style: italic; color: var(--gray-700); font-size: 1rem; line-height: 1.7; margin-bottom: 1.5rem; }
.testimonial-author { display: flex; align-items: center; gap: 1rem; }
.testimonial-avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--blue-700); color: var(--white); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.1rem; }
.testimonial-info strong { display: block; color: var(--blue-900); }
.testimonial-info span { color: var(--gray-600); font-size: 0.875rem; }
.stars { color: var(--yellow-500); margin-bottom: 1rem; }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.5rem; color: var(--gray-700); font-size: 0.9rem; }
.form-control { width: 100%; padding: 0.75rem 1rem; border: 2px solid var(--gray-200); border-radius: var(--radius); font-size: 1rem; font-family: var(--font-family); color: var(--gray-900); background: var(--white); transition: border-color 0.2s, box-shadow 0.2s; }
.form-control:focus { outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(72,149,239,0.2); }
textarea.form-control { min-height: 150px; resize: vertical; }
select.form-control { cursor: pointer; }
.form-check { display: flex; align-items: center; gap: 0.5rem; }
.form-check input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--blue-700); }
.form-error { color: var(--red-500); font-size: 0.85rem; margin-top: 0.25rem; display: block; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 3rem; }
@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info-item { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.contact-info-icon { width: 48px; height: 48px; background: var(--blue-100); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--blue-700); font-size: 1.25rem; flex-shrink: 0; }
.contact-info-text h4 { font-size: 1rem; margin-bottom: 0.25rem; }
.contact-info-text p { color: var(--gray-600); font-size: 0.9rem; }

/* Flash Messages */
.flash-messages { max-width: var(--max-width); margin: 1rem auto; padding: 0 1.5rem; }
.flash { padding: 1rem 1.25rem; border-radius: var(--radius); margin-bottom: 0.75rem; font-weight: 500; font-size: 0.95rem; }
.flash-success { background: var(--green-100); color: var(--green-800); border-left: 4px solid var(--green-500); }
.flash-error { background: var(--red-100); color: var(--red-800); border-left: 4px solid var(--red-500); }
.flash-info { background: var(--blue-100); color: var(--blue-700); border-left: 4px solid var(--blue-500); }

/* Portfolio Filter */
.filter-buttons { display: flex; justify-content: center; gap: 0.75rem; margin-bottom: 3rem; flex-wrap: wrap; }
.filter-btn { padding: 0.5rem 1.25rem; border: 2px solid var(--blue-200); border-radius: 50px; background: var(--white); color: var(--blue-700); font-weight: 600; font-size: 0.9rem; cursor: pointer; transition: all 0.2s; font-family: var(--font-family); }
.filter-btn:hover, .filter-btn.active { background: var(--blue-700); border-color: var(--blue-700); color: var(--white); }

/* Tech Badges */
.tech-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
.tech-badge { background: var(--blue-50); color: var(--blue-700); padding: 0.25rem 0.75rem; border-radius: 50px; font-size: 0.8rem; font-weight: 500; }

/* Footer */
.footer { background: var(--blue-900); color: var(--blue-300); padding: 4rem 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2.5rem; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 2rem; } }
.footer h3 { color: var(--white); font-size: 1.1rem; margin-bottom: 1.25rem; }
.footer p { font-size: 0.9rem; line-height: 1.7; }
.footer a { color: var(--blue-300); font-size: 0.9rem; display: block; margin-bottom: 0.5rem; }
.footer a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid var(--blue-800); margin-top: 3rem; padding: 1.5rem 0; text-align: center; font-size: 0.875rem; color: var(--blue-400); }

/* CTA */
.cta { text-align: center; padding: 5rem 0; }
.cta h2 { color: var(--white); margin-bottom: 1rem; }
.cta p { color: var(--blue-200); font-size: 1.15rem; margin-bottom: 2rem; }

/* About: Principles */
.principles-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
@media (max-width: 768px) { .principles-grid { grid-template-columns: 1fr; } }
.principle-item { display: flex; gap: 1rem; padding: 1.25rem; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.principle-number { width: 40px; height: 40px; min-width: 40px; background: var(--blue-700); color: var(--white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.9rem; }
.principle-item h4 { font-size: 1rem; margin-bottom: 0.25rem; }
.principle-item p { color: var(--gray-600); font-size: 0.9rem; }

/* About: Framework */
.framework-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 768px) { .framework-grid { grid-template-columns: 1fr; } }
.framework-item { background: var(--white); padding: 1.5rem; border-radius: var(--radius); text-align: center; box-shadow: var(--shadow-sm); border-top: 3px solid var(--blue-500); }
.framework-item h4 { color: var(--blue-700); margin-bottom: 0.5rem; }
.framework-item p { color: var(--gray-600); font-size: 0.875rem; }

/* Admin Layout */
.admin-layout { display: flex; min-height: calc(100vh - 70px); }
.admin-sidebar { width: 260px; background: var(--blue-900); color: var(--white); padding: 2rem 0; flex-shrink: 0; }
.admin-sidebar-title { padding: 0 1.5rem 1.5rem; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; color: var(--blue-400); font-weight: 600; border-bottom: 1px solid var(--blue-800); margin-bottom: 1rem; }
.admin-sidebar a { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1.5rem; color: var(--blue-300); font-size: 0.95rem; transition: all 0.2s; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--blue-800); color: var(--white); }
.admin-content { flex: 1; padding: 2rem; background: var(--gray-50); overflow-y: auto; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.admin-header h1 { font-size: 1.75rem; }

/* Admin Stat Cards */
.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-bottom: 2rem; }
@media (max-width: 1024px) { .stat-cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .admin-layout { flex-direction: column; } .admin-sidebar { width: 100%; } .stat-cards { grid-template-columns: 1fr; } }
.stat-card { background: var(--white); padding: 1.5rem; border-radius: var(--radius-lg); box-shadow: var(--shadow); border-left: 4px solid var(--blue-500); }
.stat-card h3 { font-size: 2rem; color: var(--blue-700); margin-bottom: 0.25rem; }
.stat-card p { color: var(--gray-600); font-size: 0.9rem; }

/* Admin Tables */
.table-container { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th { background: var(--gray-50); padding: 1rem 1.25rem; text-align: left; font-size: 0.85rem; font-weight: 600; color: var(--gray-600); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 2px solid var(--gray-200); }
.admin-table td { padding: 1rem 1.25rem; border-bottom: 1px solid var(--gray-100); font-size: 0.95rem; vertical-align: middle; }
.admin-table tr:hover { background: var(--blue-50); }
.admin-table .actions { display: flex; gap: 0.5rem; }

/* Admin Forms */
.admin-form-card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 2rem; max-width: 800px; }

/* Admin Login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 70px); background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 100%); }
.login-card { background: var(--white); padding: 3rem; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; max-width: 420px; }
.login-card h2 { text-align: center; margin-bottom: 0.5rem; }
.login-card .subtitle { text-align: center; color: var(--gray-600); margin-bottom: 2rem; }

/* Utilities */
.text-center { text-align: center; }
.text-white { color: var(--white); }
.text-blue { color: var(--blue-700); }
.text-gray { color: var(--gray-600); }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.font-bold { font-weight: 700; }
.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; }

/* Software Catalog */
.software-grid { display: grid; grid-template-columns: 250px 1fr; gap: 2rem; }
@media (max-width: 768px) { .software-grid { grid-template-columns: 1fr; } }
.category-sidebar { background: var(--white); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow); position: sticky; top: 90px; align-self: start; }
.category-sidebar h3 { font-size: 1rem; margin-bottom: 1rem; color: var(--blue-900); }
.category-sidebar a { display: block; padding: 0.5rem 0.75rem; border-radius: var(--radius); color: var(--gray-700); font-size: 0.95rem; margin-bottom: 0.25rem; }
.category-sidebar a:hover, .category-sidebar a.active { background: var(--blue-50); color: var(--blue-700); }

/* Product Card */
.product-price { font-size: 1.5rem; font-weight: 800; color: var(--blue-700); margin-top: 0.75rem; }
.product-version { font-size: 0.8rem; color: var(--gray-400); }

/* Product Detail */
.product-detail-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 3rem; }
@media (max-width: 768px) { .product-detail-grid { grid-template-columns: 1fr; } }
.product-screenshots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin-bottom: 1.5rem; }
.product-screenshots img { border-radius: var(--radius); cursor: pointer; }
.pricing-card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: 2rem; position: sticky; top: 90px; }
.pricing-card .price { font-size: 2rem; font-weight: 800; color: var(--blue-700); }
.pricing-card .license-type { font-size: 0.85rem; color: var(--gray-600); text-transform: uppercase; letter-spacing: 0.5px; }

/* Cart */
.cart-table { width: 100%; border-collapse: collapse; }
.cart-table th { text-align: left; padding: 1rem; border-bottom: 2px solid var(--gray-200); font-size: 0.85rem; color: var(--gray-600); text-transform: uppercase; }
.cart-table td { padding: 1rem; border-bottom: 1px solid var(--gray-100); vertical-align: middle; }
.cart-total { text-align: right; font-size: 1.25rem; font-weight: 700; padding: 1.5rem; }
.cart-actions { display: flex; gap: 1rem; justify-content: flex-end; margin-top: 1.5rem; }

/* Customer Dashboard */
.customer-layout { display: flex; min-height: calc(100vh - 70px); }
.customer-sidebar { width: 260px; background: var(--white); border-right: 1px solid var(--gray-200); padding: 2rem 0; flex-shrink: 0; }
.customer-sidebar-title { padding: 0 1.5rem 1.5rem; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; color: var(--gray-400); font-weight: 600; border-bottom: 1px solid var(--gray-200); margin-bottom: 1rem; }
.customer-sidebar a { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1.5rem; color: var(--gray-600); font-size: 0.95rem; transition: all 0.2s; }
.customer-sidebar a:hover, .customer-sidebar a.active { background: var(--blue-50); color: var(--blue-700); }
.customer-content { flex: 1; padding: 2rem; background: var(--gray-50); overflow-y: auto; }
@media (max-width: 768px) { .customer-layout { flex-direction: column; } .customer-sidebar { width: 100%; } }

/* License Key Display */
.license-key { font-family: 'Courier New', monospace; font-size: 1rem; font-weight: 700; letter-spacing: 2px; background: var(--gray-100); padding: 0.5rem 1rem; border-radius: var(--radius); display: inline-block; color: var(--blue-900); }

/* Purchase ID Display */
.purchase-id { font-family: 'Courier New', monospace; font-size: 1.25rem; font-weight: 700; letter-spacing: 1px; color: var(--blue-700); }

/* Login card wider for registration */
.login-card-wide { max-width: 520px; }

/* Stat cards 3 columns variant */
.stat-cards-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 768px) { .stat-cards-3 { grid-template-columns: 1fr; } }

/* Stat cards 6 columns variant */
.stat-cards-6 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 768px) { .stat-cards-6 { grid-template-columns: 1fr; } }

/* Info card for purchase details */
.info-card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 2rem; margin-bottom: 2rem; }
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
@media (max-width: 768px) { .info-grid { grid-template-columns: 1fr; } }
.info-item label { font-size: 0.8rem; color: var(--gray-400); text-transform: uppercase; letter-spacing: 0.5px; display: block; margin-bottom: 0.25rem; }
.info-item span { font-size: 1rem; font-weight: 600; color: var(--gray-900); }

/* Error Page */
.error-page { text-align: center; padding: 8rem 2rem; }
.error-page h1 { font-size: 6rem; color: var(--blue-700); margin-bottom: 1rem; }
.error-page p { color: var(--gray-600); font-size: 1.25rem; margin-bottom: 2rem; }

/* ===================================
   BLOG & NEWSLETTER
   =================================== */

/* Blog Grid */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 2rem; }
@media (max-width: 768px) { .blog-grid { grid-template-columns: 1fr; } }

/* Blog Card */
.blog-card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease; text-decoration: none; color: inherit; display: block; }
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); color: inherit; }
.blog-card-image { width: 100%; height: 200px; background-size: cover; background-position: center; background-color: var(--blue-100); }
.blog-card-content { padding: 1.5rem; }
.blog-card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--blue-900); line-height: 1.3; }
.blog-card-excerpt { color: var(--gray-600); font-size: 0.9rem; line-height: 1.6; margin-bottom: 0.75rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.blog-card-meta { display: flex; align-items: center; gap: 0.5rem; color: var(--gray-400); font-size: 0.8rem; margin-bottom: 0.5rem; flex-wrap: wrap; }
.blog-card-tags { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.5rem; }

/* Tag Badges */
.tag-badge { display: inline-block; padding: 0.3rem 0.9rem; border-radius: 50px; background: var(--gray-100); color: var(--gray-700); font-size: 0.85rem; font-weight: 500; transition: all 0.2s; text-decoration: none; }
.tag-badge:hover, .tag-badge.active { background: var(--blue-600); color: var(--white); }
.tag-small { display: inline-block; padding: 0.15rem 0.6rem; border-radius: 50px; background: var(--blue-50); color: var(--blue-700); font-size: 0.75rem; font-weight: 500; }

/* Blog Detail Layout */
.blog-detail-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 3rem; }
@media (max-width: 768px) { .blog-detail-layout { grid-template-columns: 1fr; } }

/* Blog Detail Content */
.blog-detail-content { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 2.5rem; }
.blog-excerpt { font-size: 1.1rem; color: var(--gray-700); line-height: 1.8; margin-bottom: 2rem; font-style: italic; border-left: 4px solid var(--blue-500); padding-left: 1.5rem; }
.blog-body { line-height: 1.8; color: var(--gray-700); }
.blog-body h2 { font-size: 1.5rem; margin: 2rem 0 1rem; color: var(--blue-900); }
.blog-body h3 { font-size: 1.25rem; margin: 1.5rem 0 0.75rem; color: var(--blue-900); }
.blog-body p { margin-bottom: 1rem; }
.blog-body ul, .blog-body ol { margin: 0 0 1rem 1.5rem; list-style: disc; }
.blog-body ol { list-style: decimal; }
.blog-body li { margin-bottom: 0.5rem; }
.blog-body code { background: var(--gray-100); padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.9rem; font-family: monospace; }
.blog-body pre { background: var(--gray-900); color: var(--blue-300); padding: 1.25rem; border-radius: var(--radius); overflow-x: auto; margin-bottom: 1.5rem; }
.blog-body pre code { background: none; padding: 0; color: inherit; }

/* Blog Detail Sidebar */
.blog-detail-sidebar { position: sticky; top: 90px; align-self: start; }
.sidebar-card { background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 1.5rem; margin-bottom: 1.5rem; }
.sidebar-card h3 { font-size: 1.1rem; margin-bottom: 1rem; color: var(--blue-900); }

/* Related Posts */
.related-post-item { display: block; padding: 0.75rem 0; border-bottom: 1px solid var(--gray-100); text-decoration: none; color: inherit; }
.related-post-item:last-child { border-bottom: none; }
.related-post-item strong { display: block; font-size: 0.9rem; color: var(--blue-900); margin-bottom: 0.25rem; }
.related-post-item:hover strong { color: var(--blue-600); }

/* Newsletter Box */
.newsletter-box { background: linear-gradient(135deg, var(--blue-700) 0%, var(--blue-500) 100%); border-radius: var(--radius-lg); padding: 3rem; text-align: center; margin-top: 3rem; }
.newsletter-box h2 { color: var(--white); margin-bottom: 0.75rem; }
.newsletter-box p { color: var(--blue-200); margin-bottom: 1.5rem; max-width: 500px; margin-left: auto; margin-right: auto; }
.newsletter-form { display: flex; gap: 0.75rem; max-width: 600px; margin: 0 auto; justify-content: center; }
.newsletter-form .form-control { flex: 1; min-width: 0; }
@media (max-width: 768px) { .newsletter-form { flex-direction: column; } }