:root{
  --primary: #021730;
  --secondary: #e38007;
  --bg: #f5f7fa;
  --white: #ffffff;
  --card: #ffffff;
  --shadow: 0 2px 8px rgba(44, 62, 80, 0.08);
  --radius: 12px;
  --font-main: 'Segoe UI', Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background: var(--bg);
    color: var(--primary);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 0;
}

header {
    background: var(--primary);
    color: var(--white);
    padding-bottom: 0;
}

.header-flex {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 32px 0 16px 0;
    flex-wrap: wrap;
}

.profile-img img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid var(--secondary);
    object-fit: cover;
    box-shadow: var(--shadow);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--secondary);
    margin-bottom: 8px;
}

.intro {
    margin: 12px 0 16px 0;
    font-size: 1.05rem;
}

.social-links a {
    color: var(--white);
    font-size: 1.4rem;
    margin-right: 16px;
    transition: color 0.2s;
}

.social-links a:hover {
    color: var(--secondary);
}

nav {
    background: #222c3c;
    padding: 0;
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    justify-content: center;
}

nav li{
    margin: 0 18px;
}

nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 16px 0;
    display: block;
    transition: color 0.2s;
}

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

main {
    margin-top: 24px;
    margin-bottom: 24px;
}

h2 {
    margin-bottom: 18px;
    color: var(--primary);
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 12px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 4px 16px rgba(44, 62, 80, 0.13);
}

.card h3 {
    margin-bottom: 8px;
    color: var(--secondary);
}

.card ul {
    margin-left: 18px;
    margin-top: 8px;
}

.tech-icon {
    font-size: 2.2rem;
    color: var(--secondary);
    margin-bottom: 10px;
}

footer {
    background: var(--primary);
    color: var(--white);
    padding: 18px 0;
    font-size: 1rem;
}

.footer-flex {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

footer a {
    color: var(--secondary);
    text-decoration: none;
    margin: 0 6px;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 800px) {
    .header-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
    }
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    nav li {
        margin: 8px 0;
    }
    .footer-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}

@media (max-width: 500px) {
    .container {
        width: 98%;
        padding: 12px 0;
    }
    .card {
        padding: 14px;
    }
    h2 {
        font-size: 1.2rem;
    }
}