/* Modern CSS for LOGLIM Website */
/* Import icon font */
@import url('icons.css');

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

:root {
    /* Color Palette */
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #2c3e50;
    --text-light: #7f8c8d;
    --background-color: #ffffff;
    --background-light: #f8f9fa;
    --border-color: #ecf0f1;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    --line-height: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border Radius */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Transitions */
    --transition: all 0.3s ease;
    
    /* Container */
    --container-max-width: 1200px;
    --container-padding: 1rem;
}

/* Base Styles */
html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height);
    color: var(--text-color);
    background-color: var(--background-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

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

/* Header */
.header {
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.logo-image {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    object-fit: cover;
}

.logo-text {
    color: var(--primary-color);
}

/* Navigation */
.navigation {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background-color: var(--background-light);
    color: var(--secondary-color);
}

.nav-link .icon {
    font-size: 1.1rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 2px 0;
    transition: var(--transition);
}

/* Main Layout */
.main {
    padding: var(--spacing-xl) 0;
}

.layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
    align-items: start;
}

/* Content Area */
.content {
    min-height: 500px;
}

/* Sidebar */
.sidebar {
    position: sticky;
    top: 100px;
}

.sidebar-section {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.sidebar-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Intro Section */
.intro-section {
    text-align: center;
}

.intro-logo {
    margin-bottom: var(--spacing-md);
}

.intro-image {
    width: 128px;
    height: 128px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.intro-image:hover {
    width: 256px;
    height: 256px;
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    z-index: 10;
    position: relative;
}

.intro-header h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.intro-header p {
    color: var(--text-light);
    font-style: italic;
}

/* Article Lists */
.article-list,
.software-list {
    list-style: none;
}

.article-item,
.software-item {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.article-item:last-child,
.software-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.article-title,
.software-title {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.article-title a,
.software-title a {
    color: var(--text-color);
    font-weight: 500;
}

.article-title a:hover,
.software-title a:hover {
    color: var(--secondary-color);
}

.article-date {
    font-size: var(--font-size-small);
    color: var(--text-light);
}

.software-description {
    font-size: var(--font-size-small);
    color: var(--text-light);
    line-height: 1.4;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xxl);
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: white;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
}

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.button:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
}

.button.secondary {
    background-color: transparent;
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
}

.button.secondary:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* Cards */
.card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 4px 16px var(--shadow-color);
    transform: translateY(-2px);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-color);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: inherit;
    transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

/* Responsive Design */
@media (max-width: 1024px) {
    .layout {
        grid-template-columns: 1fr 250px;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 0.75rem;
    }
    
    .layout {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .sidebar {
        position: static;
        order: -1;
    }
    
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--background-color);
        flex-direction: column;
        padding: var(--spacing-md);
        border-top: 1px solid var(--border-color);
        box-shadow: 0 4px 8px var(--shadow-color);
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 0.5rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }
    
    .header-content {
        padding: var(--spacing-sm) 0;
    }
    
    .logo-text {
        display: none;
    }
    
    .main {
        padding: var(--spacing-lg) 0;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

/* Print Styles */
@media print {
    .header,
    .sidebar,
    .footer {
        display: none;
    }
    
    .layout {
        grid-template-columns: 1fr;
    }
    
    .main {
        padding: 0;
    }
}

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

/* Focus styles for accessibility */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Skip to content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 1001;
}

.skip-link:focus {
    top: 6px;
}