/* ========================================
   KORENO - Main Stylesheet
   Institutional Knowledge Portal Design
   ======================================== */

/* ========== VARIABLES & DESIGN TOKENS ========== */
:root {
    /* Primary Colors */
    --color-primary: #F0F2F5;
    --color-secondary: #CED4DA;
    
    /* Neutral Colors */
    --color-text-dark: #343A40;
    --color-text-light: #6C757D;
    
    /* Accent Colors */
    --color-accent-green: #4CAF50;
    --color-accent-blue: #2196F3;
    --color-accent-orange: #FF9800;
    
    /* Backgrounds & Borders */
    --color-bg: #FFFFFF;
    --color-border: #E9ECEF;
    
    /* Typography */
    --font-sans: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-serif: 'Georgia', serif;
    --font-mono: 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-heavy: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* ========== RESET & BASE STYLES ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text-dark);
    background-color: var(--color-primary);
    line-height: 1.6;
    font-size: 16px;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 36px;
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-md);
}

h4 {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: var(--color-text-dark);
}

a {
    color: var(--color-accent-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent-green);
    text-decoration: underline;
}

/* ========== CONTAINER & LAYOUT ========== */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

/* ========== HEADER ========== */
.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-light);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.logo h1 {
    margin-bottom: 0;
    font-size: 28px;
}

.tagline {
    font-size: 12px;
    color: var(--color-text-light);
    margin: 0;
}

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

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-dark);
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
    padding-bottom: 4px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent-green);
    border-bottom-color: var(--color-accent-green);
}

/* ========== HERO SECTION ========== */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    padding: var(--spacing-xxl) 0;
}

.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-content h1 {
    font-size: 52px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    max-height: 500px;
}

/* ========== MAIN CONTENT ========== */
.main-content {
    min-height: calc(100vh - 200px);
}

/* ========== SECTIONS ========== */
.intro-section,
.features-section,
.contact-section,
.content-section,
.compliance-section,
.contact-form-section,
.article-content,
.blog-section,
.blog-nav-section,
.thank-you-section,
.policy-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg);
}

.features-section {
    background-color: var(--color-primary);
}

/* ========== GRID LAYOUTS ========== */
.section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.section-grid.reverse {
    grid-template-columns: 1fr 1fr;
}

.section-grid.reverse > img {
    order: -1;
}

.section-text {
    flex: 1;
}

.section-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    object-fit: cover;
    max-height: 450px;
}

/* ========== FEATURE CARDS ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

.feature-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.card-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
}

.feature-card h3 {
    padding: var(--spacing-md) var(--spacing-md) 0;
}

.feature-card p {
    padding: 0 var(--spacing-md) var(--spacing-md);
}

/* ========== BLOG SECTION ========== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.blog-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

.blog-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-6px);
}

.blog-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.blog-card h3 {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
    margin-bottom: 0;
}

.blog-card p {
    padding: 0 var(--spacing-md);
    font-size: 14px;
    color: var(--color-text-light);
}

.blog-link {
    display: inline-block;
    margin: var(--spacing-md);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent-blue);
    transition: color 0.3s ease;
}

.blog-link:hover {
    color: var(--color-accent-green);
}

/* ========== CONTACT GRID ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-card {
    background-color: var(--color-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-accent-green);
}

.contact-card h3 {
    color: var(--color-accent-green);
}

.contact-link {
    font-weight: 600;
    color: var(--color-accent-blue);
    display: inline-block;
    margin-top: var(--spacing-sm);
}

/* ========== FORM STYLES ========== */
.form-wrapper {
    max-width: 600px;
    margin: var(--spacing-lg) 0 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 500;
    color: var(--color-text-dark);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.submit-btn {
    background-color: var(--color-accent-green);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.submit-btn:hover {
    background-color: #45a049;
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

/* ========== BUTTONS & LINKS ========== */
.cta-link {
    display: inline-block;
    background-color: var(--color-accent-blue);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all 0.3s ease;
    margin-top: var(--spacing-md);
}

.cta-link:hover {
    background-color: #1976D2;
    text-decoration: none;
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

/* ========== DISCLAIMER & COMPLIANCE BOX ========== */
.disclaimer-box,
.compliance-box {
    background-color: #FFF9E6;
    border-left: 4px solid var(--color-accent-orange);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.disclaimer-box h4,
.compliance-box h3 {
    color: var(--color-accent-orange);
}

.compliance-box ul {
    list-style: none;
    padding-left: var(--spacing-md);
}

.compliance-box li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
}

.compliance-box li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent-orange);
}

/* ========== ARTICLE BODY ========== */
.article-body {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.9;
}

.article-body h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

.article-body h3 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-green);
}

.article-body p {
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

.content-list,
.tips-list {
    list-style: none;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.content-list li,
.tips-list li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-lg);
    position: relative;
}

.content-list li:before,
.tips-list li:before {
    content: "◆";
    position: absolute;
    left: var(--spacing-sm);
    color: var(--color-accent-green);
}

/* ========== POLICY CONTENT ========== */
.policy-content {
    max-width: 800px;
    margin: 0 auto;
}

.policy-content h2 {
    margin-top: var(--spacing-xl);
    color: var(--color-text-dark);
}

.policy-content h3 {
    color: var(--color-accent-blue);
    margin-top: var(--spacing-lg);
}

/* ========== THANK YOU ========== */
.thank-you-content {
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-md);
}

.thank-you-content h1 {
    color: var(--color-accent-green);
    margin-bottom: var(--spacing-lg);
}

.thank-you-content p {
    font-size: 18px;
    margin-bottom: var(--spacing-md);
}

/* ========== FOOTER ========== */
.footer {
    background-color: var(--color-text-dark);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: #B0B0B0;
    font-size: 14px;
    margin-bottom: var(--spacing-sm);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: #B0B0B0;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--color-accent-green);
}

.footer-bottom {
    border-top: 1px solid #4A4A4A;
    padding-top: var(--spacing-lg);
    text-align: center;
    color: #808080;
    font-size: 12px;
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 1024px) {
    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 32px;
    }

    .hero {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

    .section-grid.reverse > img {
        order: 1;
    }

    .features-grid,
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-md: 16px;
        --spacing-lg: 24px;
        --spacing-xl: 32px;
        --spacing-xxl: 40px;
    }

    h1 {
        font-size: 32px;
    }

    h2 {
        font-size: 24px;
    }

    h3 {
        font-size: 20px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .features-grid,
    .blog-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }

    .hero-image,
    .section-image {
        max-height: 300px;
    }

    .form-wrapper {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 20px;
    }

    h3 {
        font-size: 18px;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .nav-menu {
        gap: var(--spacing-xs);
    }

    .nav-link {
        font-size: 13px;
    }
}

/* ========== ACCESSIBILITY ========== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ========== PRINT STYLES ========== */
@media print {
    .header,
    .footer,
    .nav-menu,
    .contact-form,
    .cta-link {
        display: none;
    }

    body {
        background-color: white;
    }

    a {
        text-decoration: underline;
    }
}