* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f7fafc;
    color: #2d3748;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.sticky-signature {
    position: fixed;
    top: 15px;
    left: 15px;
    width: 60px;
    height: 60px;
    background-color: white;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    z-index: 9999;
    object-fit: contain;
    padding: 8px;
    transition: transform 0.3s ease;
}

.sticky-signature:hover {
    transform: scale(1.1);
}

header {
    background-color: #1a202c;
    padding: 1.2rem 5% 1.2rem 90px; 
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: #63b3ed;
    font-size: 1.8rem;
    font-weight: bold;
    text-decoration: none;
}

.nav-links a {
    color: #e2e8f0;
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.nav-links a:hover, .nav-links a.active {
    color: #63b3ed;
}

.hero {
    background-image: linear-gradient(rgba(26, 32, 44, 0.8), rgba(43, 108, 176, 0.8)), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=1200&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    padding: 6rem 5%;
    text-align: center;
    border-bottom: 1px solid #bee3f8;
}

.hero h1 {
    font-size: 3rem;
    color: #ffffff; 
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #e2e8f0;
    max-width: 600px;
    margin: 0 auto;
}

main {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 3rem auto;
    padding: 0 2rem;
}

.page-title, h1 {
    font-size: 2.2rem;
    color: #1a202c;
    margin-bottom: 1.5rem;
    border-bottom: 3px solid #63b3ed;
    display: inline-block;
    padding-bottom: 0.5rem;
}

h2 { font-size: 1.8rem; color: #2d3748; margin: 1.5rem 0 0.8rem 0; }
h3 { font-size: 1.5rem; color: #2b6cb0; margin: 1.2rem 0 0.5rem 0; }
h4 { font-size: 1.2rem; color: #4a5568; margin: 1rem 0 0.5rem 0; }
h5 { font-size: 1.1rem; color: #718096; margin: 0.8rem 0 0.5rem 0; font-style: italic; }
h6 { font-size: 1rem; color: #a0aec0; margin: 0.5rem 0; text-transform: uppercase; }

p {
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: #4a5568;
}

ul, ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: #4a5568;
}

li {
    margin-bottom: 0.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background-color: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

table, th, td {
    border: 1px solid #cbd5e0;
}

th, td {
    padding: 1rem;
    text-align: left;
}

th {
    background-color: #ebf8ff;
    color: #2b6cb0;
}

.video-wrapper {
    margin: 2rem 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

video {
    width: 100%;
    display: block;
}

button, .btn {
    display: inline-block;
    background-color: #3182ce;
    color: white;
    border: none;
    text-decoration: none;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover, .btn:hover {
    background-color: #2b6cb0;
}

footer {
    background-color: #1a202c;
    color: #a0aec0;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: auto;
}