@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #3a7bd5;
    --secondary-color: #3a6073;
    --background-color: #f0f2f5;
    --text-color: #333;
    --card-bg-color: #ffffff;
    --header-bg-color: #2c3e50;
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.8;
    background-color: var(--background-color);
    color: var(--text-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
    overflow: hidden;
    padding: 20px 0;
}

header {
    background-color: var(--header-bg-color);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
}

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

nav li {
    margin-left: 25px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

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

main {
    padding-top: 80px;
}

#hero {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
}

.hero-text p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.cta-button {
    background-color: white;
    color: var(--primary-color);
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 700;
    transition: background-color 0.3s, color 0.3s;
}

.cta-button:hover {
    background-color: var(--secondary-color);
    color: white;
}

section {
    padding: 60px 0;
}

.card {
    background-color: var(--card-bg-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.card.visible {
    opacity: 1;
    transform: translateY(0);
}

h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.5rem;
    color: var(--secondary-color);
}

#experience ul, #skills ul {
    list-style: none;
}

#experience li, #skills li {
    margin-bottom: 10px;
}

.grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

#contact a {
    color: var(--primary-color);
    text-decoration: none;
}

#contact a:hover {
    text-decoration: underline;
}

footer {
    background: var(--header-bg-color);
    color: white;
    text-align: center;
    padding: 20px;
}

@media(max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
    nav {
        display: none; /* Simple hiding for mobile, can be replaced with a hamburger menu */
    }
}