/* Base Setup and Typography */
:root {
    /* Color Palette */
    --primary-blue: #2B547E;     /* Deep corporate blue */
    --secondary-blue: #6595bf;   /* Archive matching blue */
    --accent-blue: #0A66C2;      /* Vibrant link blue */
    --dark-text: #1a1a1a;
    --light-text: #4a4a4a;
    --light-gray: #f8f9fa;
    --border-gray: #e0e0e0;
    --white: #ffffff;
    --alert-purple: #8e44ad;
    --alert-purple-light: #f5eef8;

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Shadows for premium look */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    color: var(--dark-text);
    background-color: var(--light-gray);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
    color: var(--primary-blue);
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    font-weight: 600;
}

p {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--light-text);
}

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

a:hover {
    color: var(--primary-blue);
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* Main Content Area */
.site-content {
    min-height: calc(100vh - 200px); /* Adjust based on header/footer height */
    padding: var(--spacing-xxl) 0;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Header and Navigation (Day 3)
   ========================================================================== */

/* Header Top */
.site-header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 100;
}

.header-top {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-gray);
}

.logo-section a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.site-logo {
    max-height: 60px;
    margin-right: var(--spacing-md);
}

.site-title-wrap {
    display: flex;
    flex-direction: column;
}

.site-title {
    margin: 0;
    font-size: 1.8rem;
    color: var(--primary-blue);
    font-weight: 700;
}

.site-description {
    margin: 0;
    font-size: 0.9rem;
    color: var(--secondary-blue);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.banner-section img {
    max-height: 70px;
    border-radius: 4px;
    box-shadow: var(--shadow-sm);
}

/* Main Navigation */
.main-navigation {
    background-color: var(--primary-blue);
}

.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--white);
    font-weight: 600;
    font-size: 0.95rem;
    transition: background-color var(--transition-fast);
}

.nav-menu > li > a:hover {
    background-color: var(--secondary-blue);
    color: var(--white);
}

/* Dropdown Menu */
.has-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    min-width: 220px;
    box-shadow: var(--shadow-md);
    border-radius: 0 0 4px 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    list-style: none;
    padding: 0;
    margin: 0;
    z-index: 101;
    border-top: 3px solid var(--secondary-blue);
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    border-bottom: 1px solid var(--light-gray);
}

.dropdown-menu li:last-child {
    border-bottom: none;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--dark-text);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--light-gray);
    color: var(--primary-blue);
    padding-left: calc(var(--spacing-md) + 5px);
}

/* Responsive Navigation */
@media (max-width: 768px) {
    .header-top .flex-container {
        flex-direction: column;
        text-align: center;
    }
    
    .logo-section a {
        justify-content: center;
        margin-bottom: var(--spacing-md);
    }
    
    .nav-menu {
        flex-direction: column;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-top: none;
        background-color: var(--light-gray);
        display: none;
    }
    
    .has-dropdown:hover .dropdown-menu {
        display: block;
    }
}

/* ==========================================================================
   Index Page Styles (Day 4 & 5)
   ========================================================================== */

/* Hero Alert Box */
.hero-alert {
    background: linear-gradient(135deg, var(--alert-purple) 0%, #6c3483 100%);
    color: var(--white);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    border-radius: 8px;
    margin-bottom: var(--spacing-xxl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.hero-alert h2 {
    color: var(--white);
    font-size: 2.2rem;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero-alert p {
    font-size: 1.1rem;
    color: var(--alert-purple-light);
    max-width: 800px;
    margin: 0 auto;
}

.hero-btn {
    display: inline-block;
    background-color: var(--white);
    color: var(--alert-purple);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 30px;
    font-weight: 700;
    margin-top: var(--spacing-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-btn:hover {
    color: var(--alert-purple);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Two-Column Products Layout */
.products-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

.product-column {
    background-color: var(--white);
    border-radius: 8px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--primary-blue);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.product-column:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-column.corporate {
    border-top-color: var(--secondary-blue);
}

.column-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--light-gray);
}

.column-icon {
    font-size: 2rem;
    margin-right: var(--spacing-sm);
    color: var(--primary-blue);
}

.product-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.product-list li {
    margin-bottom: var(--spacing-sm);
    padding-left: 24px;
    position: relative;
}

.product-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-blue);
    font-weight: bold;
}

.product-list a {
    color: var(--dark-text);
    font-weight: 500;
}

.product-list a:hover {
    color: var(--primary-blue);
    text-decoration: underline;
}

/* Bottom Training Courses Section */
.training-section {
    background-color: var(--light-gray);
    padding: var(--spacing-xl);
    border-radius: 8px;
    text-align: center;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.training-courses {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.course-badge {
    background-color: var(--white);
    color: var(--primary-blue);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-gray);
    transition: all var(--transition-fast);
}

.course-badge:hover {
    background-color: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

/* ==========================================================================
   Products Page Styles
   ========================================================================== */

/* Products Hero */
.products-hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1a3a5c 50%, #0f2744 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.products-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: subtleMove 20s linear infinite;
}

@keyframes subtleMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(30px, 30px); }
}

.products-hero h1 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.products-hero-sub {
    color: rgba(255,255,255,0.8) !important;
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Products Page Layout */
.products-page-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl) var(--spacing-md);
    align-items: start;
}

@media (max-width: 900px) {
    .products-page-layout {
        grid-template-columns: 1fr;
    }
}

/* Single Product Page Layout (no sidebar) */
.product-page-single {
    max-width: 960px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* Product Sidebar */
.product-sidebar {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    position: sticky;
    top: var(--spacing-md);
    border: 1px solid var(--border-gray);
}

.sidebar-title {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--light-text);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-blue);
}

.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav li {
    margin-bottom: 2px;
}

.sidebar-category {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--light-text);
    padding: var(--spacing-sm) var(--spacing-sm);
    margin-top: var(--spacing-md);
    opacity: 0.7;
}

.sidebar-nav li:first-child .sidebar-category,
.sidebar-category:first-child {
    margin-top: 0;
}

.sidebar-nav a {
    display: block;
    padding: 8px 12px;
    color: var(--dark-text);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.sidebar-nav a:hover {
    background-color: var(--light-gray);
    color: var(--primary-blue);
    padding-left: 16px;
}

.sidebar-nav a.active {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
}

.sidebar-nav a.active:hover {
    color: var(--white);
    padding-left: 16px;
}

/* Product Detail Content */
.product-detail-content {
    min-width: 0;
}

/* Product Header Card */
.product-header-card {
    display: flex;
    gap: var(--spacing-xl);
    background: linear-gradient(135deg, #f8f9ff 0%, #eef2ff 100%);
    border-radius: 16px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(43, 84, 126, 0.1);
    margin-bottom: var(--spacing-xl);
    align-items: center;
    overflow: hidden;
    position: relative;
}

.product-header-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(43,84,126,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

@media (max-width: 768px) {
    .product-header-card {
        flex-direction: column;
    }
}

.product-header-info {
    flex: 1;
    position: relative;
    z-index: 1;
}

.product-header-image {
    flex: 0 0 340px;
    position: relative;
    z-index: 1;
}

.product-header-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    transition: transform var(--transition-normal);
}

.product-header-image img:hover {
    transform: scale(1.02);
}

@media (max-width: 768px) {
    .product-header-image {
        flex: none;
        width: 100%;
    }
}

.product-category-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.product-detail-title {
    font-size: 2.4rem;
    color: var(--primary-blue);
    margin-bottom: 4px;
    font-weight: 700;
}

.product-detail-tagline {
    font-size: 1.05rem;
    color: var(--light-text);
    margin-bottom: var(--spacing-md);
}

.product-price-tag {
    display: inline-flex;
    align-items: baseline;
    background: var(--white);
    padding: 8px 20px;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-gray);
}

.price-amount {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.price-unit {
    font-size: 0.9rem;
    color: var(--light-text);
    margin-left: 4px;
}

.product-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.meta-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--white);
    border: 1px solid var(--border-gray);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.82rem;
    color: var(--light-text);
}

.meta-icon {
    font-size: 0.9rem;
}

/* Product Section Cards */
.product-section-card {
    background: var(--white);
    border-radius: 14px;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
    border: 1px solid var(--border-gray);
    transition: box-shadow var(--transition-normal);
}

.product-section-card:hover {
    box-shadow: var(--shadow-lg);
}

.section-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, #f0f4f8 0%, #e8edf3 100%);
    border-bottom: 1px solid var(--border-gray);
}

.section-card-header h3 {
    margin: 0;
    font-size: 1.15rem;
    color: var(--primary-blue);
}

.section-icon {
    font-size: 1.3rem;
}

.section-card-body {
    padding: var(--spacing-xl);
}

.section-card-body p {
    line-height: 1.8;
    font-size: 0.95rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature-item {
    background: linear-gradient(135deg, #fafbff 0%, var(--light-gray) 100%);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border-gray);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-blue), var(--secondary-blue));
    border-radius: 4px 0 0 4px;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.feature-item:hover::before {
    opacity: 1;
}

.feature-icon-wrap {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    background: var(--white);
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.feature-item h4 {
    font-size: 1rem;
    color: var(--dark-text);
    margin-bottom: 6px;
}

.feature-item p {
    font-size: 0.88rem;
    color: var(--light-text);
    margin: 0;
    line-height: 1.6;
}

/* Specs Table */
.specs-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.specs-table tr {
    transition: background-color var(--transition-fast);
}

.specs-table tr:hover {
    background-color: var(--light-gray);
}

.specs-table td {
    padding: 14px var(--spacing-md);
    border-bottom: 1px solid var(--border-gray);
    font-size: 0.92rem;
}

.specs-table tr:last-child td {
    border-bottom: none;
}

.spec-label {
    font-weight: 600;
    color: var(--primary-blue);
    width: 180px;
    white-space: nowrap;
}

.spec-value {
    color: var(--dark-text);
}

/* Use Cases Grid */
.usecases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.usecase-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 16px;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f4f8 100%);
    border-radius: 10px;
    border: 1px solid var(--border-gray);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--dark-text);
    transition: all var(--transition-fast);
}

.usecase-item:hover {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.usecase-icon {
    font-size: 1.4rem;
}

/* Product CTA Card */
.product-cta-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1a3a5c 100%);
    border-radius: 16px;
    padding: var(--spacing-xl) var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
    position: relative;
    overflow: hidden;
}

.product-cta-card::before {
    content: '';
    position: absolute;
    top: -30px;
    right: -30px;
    width: 150px;
    height: 150px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.product-cta-card::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: 30%;
    width: 100px;
    height: 100px;
    background: rgba(255,255,255,0.03);
    border-radius: 50%;
}

@media (max-width: 768px) {
    .product-cta-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-xl);
    }
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h3 {
    color: var(--white);
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.cta-content p {
    color: rgba(255,255,255,0.75);
    margin: 0;
    font-size: 0.95rem;
}

.cta-actions {
    display: flex;
    gap: var(--spacing-md);
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}

.cta-btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.cta-btn-primary:hover {
    background: var(--light-gray);
    color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.4);
}

.cta-btn-secondary:hover {
    border-color: var(--white);
    color: var(--white);
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

/* Product Summary Cards (other products) */
.product-summary-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-gray);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.product-summary-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
    border-left: 4px solid var(--primary-blue);
}

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

.summary-card-inner h3 {
    font-size: 1.25rem;
    margin-bottom: 6px;
}

.summary-card-inner p {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.summary-link {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--accent-blue);
    transition: all var(--transition-fast);
}

.summary-link:hover {
    color: var(--primary-blue);
    letter-spacing: 0.5px;
}