:root {
    --bg-color: #f0f2f5; 
    --nav-bg: #343a40;
    --nav-text: #ffffff;
    --accent-color: #007bff; 
    --secondary-color: #6c757d;
    --hover-color: #ffc107; 
    --text-main: #212529;
    --text-muted: #495057;
    --container-width: 900px;
}

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

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


header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background-color: transparent;
}

.logo img {
    height: 50px;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.1);
}

nav {
    background-color: var(--nav-bg);
    padding: 10px 30px;
    border-radius: 12px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

nav ul li a {
    color: var(--nav-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: var(--hover-color);
}

main {
    max-width: var(--container-width);
    margin: 40px auto;
    padding: 0 20px;
}

.hero {
    display: flex;
    align-items: center;
    gap: 50px;
    margin-bottom: 60px;
}

.profile-img-container {
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.profile-img {
    width: 280px;
    height: 350px;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease, filter 0.3s ease;
}

.profile-img-container:hover .profile-img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.hero-text {
    flex-grow: 1;
}

.hero-text h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.hero-text h2 {
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 40px;
}

.stair-line {
    margin: 20px 0;
}

.stair-line svg {
    width: 100%;
    height: auto;
}

.intro-text {
    max-width: 800px; 
    margin: 0 auto 60px;
    text-align: justify;
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.8;
}

footer {
    border-top: 1px solid #dee2e6;
    padding: 40px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.footer-info span {
    margin-right: 20px;
}

.bg-banner {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #007bff 0%, #6610f2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    margin-bottom: 40px;
    border-radius: 0 0 50px 50px;
}

.bg-banner h2 {
    font-size: 2.5rem;
    letter-spacing: 2px;
}