/* style.css */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --border-color: #dee2e6;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
}

/* Layout Components */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.section {
    padding: 80px 0;
}

/* Header Styles */
.top-header {
    background: var(--primary-color);
    padding: 10px 0;
    color: white;
}

.main-header {
    padding: 20px 0;
    background: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logo-placeholder {
    width: 200px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* Navigation */
.navbar {
    background: var(--secondary-color);
    padding: 0;
}

.nav-link {
    color: white !important;
    padding: 15px 20px !important;
    transition: background 0.3s;
}

.nav-link:hover {
    background: rgba(255,255,255,0.1);
}

/* Hero Section */
.hero-placeholder {
    height: 600px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-bottom: 60px;
}

/* Card Styles */
.card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 30px;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.card-img-placeholder {
    height: 200px;
    background: var(--light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-size: 0.9em;
}

.card-body {
    padding: 20px;
}

/* Timeline Styles */
.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--secondary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -50px;
    top: 20px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--secondary-color);
}

/* Form Styles */
.form-control {
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 15px;
}

.btn {
    padding: 12px 30px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

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

.btn-primary:hover {
    background: #2980b9;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 60px 0 30px;
}

/* 404 Page */
.error-page {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-placeholder {
        height: 400px;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .timeline {
        padding-left: 30px;
    }
    
    .timeline-item::before {
        left: -30px;
    }
}
.nav-link.active {
    background-color: #2980b9;
    color: white !important;
    border-radius: 5px;
}