:root {
    --primary-color: #0f172a;
    --secondary-color: #60a5fa;
    --background-color: #e0f2fe;
    --text-color: #0c4a6e;
    --accent-color: #60a5fa;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

header.sticky {
    position: sticky;
    top: 0;
    background: var(--background-color);
    border-bottom: 1px solid #cbd5e1;
    z-index: 999;
}

.header-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 15px 0;
}

.logo {
    width: 80px;
    height: auto;
}

.header-text {
    text-align: center;
}

h1 {
    font-size: 1.8em;
    color: var(--primary-color);
}

.tagline {
    font-size: 1em;
    color: var(--secondary-color);
}

.container {
    width: 90%;
    max-width: 900px;
    margin: 40px auto;
}

.card {
    background: #ffffff;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

h2 {
    font-size: 1.5em;
    margin-bottom: 20px;
    color: var(--primary-color);
}

ul, ol {
    margin-left: 20px;
}

li {
    margin-bottom: 10px;
}

.contact-button {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 24px;
    background: var(--accent-color);
    color: #ffffff;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s ease;
}

.contact-button:hover {
    background: var(--primary-color);
}

footer {
    text-align: center;
    padding: 20px 0;
    font-size: 0.9em;
    color: var(--primary-color);
    border-top: 1px solid #cbd5e1;
}