/* Main Styles for Project Management Website */

/* Base Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --link-color: #3498db;
    --link-hover-color: #2980b9;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --border-radius: 4px;
    --box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Sarabun', 'Noto Sans Thai', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-top: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--secondary-color);
}

h3 {
    font-size: 1.5rem;
    margin-top: 1.5rem;
    color: var(--secondary-color);
}

p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

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

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

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Header */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    color: white;
    margin-bottom: 0.5rem;
}

header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.2rem;
    text-align: center;
}

/* Navigation */
nav {
    background-color: var(--secondary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--box-shadow);
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

nav li {
    margin: 0 0.5rem;
    margin-bottom: 0.5rem;
}

nav a {
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: block;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.2);
    text-decoration: none;
}

nav a.active {
    background-color: rgba(255, 255, 255, 0.3);
    font-weight: bold;
}

/* Main Content */
main {
    padding: 2rem 0;
}

.content-page {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.content-page h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.2rem;
}

.content-page section {
    margin-bottom: 2.5rem;
}

/* Home Page Cards */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: var(--secondary-color);
    color: white;
    padding: 1rem;
    text-align: center;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem;
    text-align: center;
    border-top: 1px solid #eee;
}

.btn {
    display: inline-block;
    background-color: var(--secondary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn:hover {
    background-color: var(--link-hover-color);
    text-decoration: none;
    color: white;
}

/* Page Navigation */
.page-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.page-navigation a {
    background-color: var(--secondary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.page-navigation a:hover {
    background-color: var(--link-hover-color);
    text-decoration: none;
}

.page-navigation .prev::before {
    content: "← ";
}

.page-navigation .next::after {
    content: " →";
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: var(--secondary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    box-sizing: border-box;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -12px;
    background-color: white;
    border: 4px solid var(--secondary-color);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item.left {
    left: 0;
}

.timeline-item.right {
    left: 50%;
}

.timeline-item.right::after {
    left: -12px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.timeline-content h3 {
    margin-top: 0;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 12px 15px;
    text-align: left;
}

th {
    background-color: var(--secondary-color);
    color: white;
}

tr:nth-child(even) {
    background-color: #f2f2f2;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

footer p {
    margin-bottom: 0;
    text-align: center;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav li {
        margin: 0.25rem 0;
        width: 100%;
        text-align: center;
    }
    
    .timeline::after {
        left: 31px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    
    .timeline-item.right {
        left: 0;
    }
    
    .timeline-item::after {
        left: 18px;
    }
    
    .timeline-item.right::after {
        left: 18px;
    }
}

/* Print Styles */
@media print {
    nav, .page-navigation, footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
    
    .content-page {
        box-shadow: none;
        padding: 0;
    }
    
    a {
        color: black;
        text-decoration: none;
    }
}

/* Additional Elements */
blockquote {
    border-left: 4px solid var(--secondary-color);
    padding: 1rem;
    margin: 1.5rem 0;
    background-color: #f9f9f9;
}

code {
    font-family: monospace;
    background-color: #f5f5f5;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
}

.highlight {
    background-color: #ffffcc;
    padding: 0.2rem;
}

.note {
    background-color: #e8f4fd;
    border-left: 4px solid var(--secondary-color);
    padding: 1rem;
    margin: 1.5rem 0;
}

.warning {
    background-color: #fff5e6;
    border-left: 4px solid var(--warning-color);
    padding: 1rem;
    margin: 1.5rem 0;
}

.success {
    background-color: #e6ffee;
    border-left: 4px solid var(--success-color);
    padding: 1rem;
    margin: 1.5rem 0;
}

/* Thai Font Support */
@font-face {
    font-family: 'Sarabun';
    src: url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;700&display=swap');
}

@font-face {
    font-family: 'Noto Sans Thai';
    src: url('https://fonts.googleapis.com/css2?family=Noto+Sans+Thai:wght@300;400;700&display=swap');
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-in {
    animation: slideIn 0.5s ease-in;
}

@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}