/* ==========================================
   IT Project Management Toolkit - Styles
   ========================================== */

/* Root Variables */
:root {
    --primary-color: #2ea44f;
    --secondary-color: #0366d6;
    --accent-color: #6f42c1;
    --dark-color: #24292e;
    --light-color: #f6f8fa;
    --border-color: #e1e4e8;
    --text-color: #24292e;
    --text-light: #586069;
    
    --phase-1: #FFD700;
    --phase-2: #FF6B6B;
    --phase-3: #4ECDC4;
    --phase-4: #95E1D3;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --border-radius: 6px;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #ffffff;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    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-sm);
    color: var(--text-light);
}

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

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

/* Navigation Bar */
.navbar {
    background-color: var(--dark-color);
    color: white;
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-weight: 700;
    font-size: 1.3rem;
    color: white;
}

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

.nav-links a {
    color: #e1e4e8;
    transition: color var(--transition);
}

.nav-links a:hover {
    color: white;
}

.btn-github {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-weight: 600;
}

.btn-github:hover {
    background-color: #2d9a45;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all var(--transition);
    text-align: center;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #2d9a45;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46, 164, 79, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

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

.btn-template {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--secondary-color);
    color: white;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition);
    margin-top: var(--spacing-md);
}

.btn-template:hover {
    background-color: #0256c7;
    transform: translateX(2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: calc(var(--spacing-xl) * 2) var(--spacing-md);
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.hero .tagline {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Audience Section */
.audience {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--light-color);
}

.audience h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.audience-card {
    background-color: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.audience-card:hover {
    border-color: var(--secondary-color);
    box-shadow: 0 4px 12px rgba(3, 102, 214, 0.1);
    transform: translateY(-4px);
}

.audience-card .emoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.audience-card p {
    color: var(--text-light);
}

/* Phases Section */
.phases {
    padding: var(--spacing-xl) var(--spacing-md);
}

.phases h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
}

.phase-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.phase-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.phase-header {
    padding: var(--spacing-lg);
    color: white;
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.phase-header h3 {
    margin: 0;
    font-size: 1.5rem;
}

.phase-number {
    font-size: 2.5rem;
    font-weight: 700;
    opacity: 0.3;
}

.phase-1 { background: linear-gradient(135deg, #FFD700, #FFC700); color: #333; }
.phase-2 { background: linear-gradient(135deg, #FF6B6B, #FF5252); }
.phase-3 { background: linear-gradient(135deg, #4ECDC4, #45b7af); }
.phase-4 { background: linear-gradient(135deg, #95E1D3, #7ecec9); color: #333; }

.phase-content {
    padding: var(--spacing-lg);
}

.templates-list {
    margin: var(--spacing-lg) 0;
}

.template-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    transition: all var(--transition);
}

.template-item:hover {
    background-color: #e8ecf1;
    transform: translateX(4px);
}

.template-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.template-item strong {
    display: block;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.template-item p {
    font-size: 0.9rem;
    margin: 0;
}

/* Case Study Section */
.case-study {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-xl) var(--spacing-md);
}

.case-study h2,
.case-study h4 {
    color: white;
}

.case-study-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.case-study-card {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.case-study-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.case-study-info ul {
    list-style: none;
    margin-top: var(--spacing-md);
}

.case-study-info li {
    padding: 0.5rem 0;
    color: rgba(255, 255, 255, 0.9);
}

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

/* Features Section */
.features {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--light-color);
}

.features h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature {
    background-color: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.feature:hover {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(111, 66, 193, 0.1);
}

.feature-emoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.feature p {
    margin-bottom: 0;
}

/* Quick Start Section */
.quick-start {
    padding: var(--spacing-xl) var(--spacing-md);
}

.quick-start h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition);
}

.step:hover {
    border-color: var(--secondary-color);
    background-color: var(--light-color);
}

.step-number {
    display: inline-block;
    width: 3rem;
    height: 3rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    line-height: 3rem;
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
}

.step h3 {
    margin-bottom: var(--spacing-sm);
}

.step p {
    margin-bottom: 0;
}

/* About Section */
.about {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--light-color);
}

.about h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.about-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.about-content h3 {
    margin-bottom: var(--spacing-sm);
}

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

.social-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all var(--transition);
}

.social-link:hover {
    background-color: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

/* Support Section */
.support {
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.support-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.support-action {
    padding: var(--spacing-lg);
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    transition: all var(--transition);
}

.support-action:hover {
    background-color: #e8ecf1;
    transform: translateY(-4px);
}

.support-action .emoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.support-action p {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: #e1e4e8;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    margin-top: var(--spacing-xl);
}

.footer a {
    color: #79c0ff;
    transition: color var(--transition);
}

.footer a:hover {
    color: white;
}

.footer p {
    margin-bottom: var(--spacing-sm);
    color: #e1e4e8;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.2rem; }
    
    .navbar .container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero .tagline {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .phase-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .audience-grid,
    .features-grid,
    .steps,
    .support-actions {
        grid-template-columns: 1fr;
    }
}