/* --- Root Variables --- */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #f4f7f6;
    --surface-color: #ffffff;
    --text-color: #333333;
    --heading-font: 'Poppins', sans-serif;
    --body-font: 'Roboto', sans-serif;
    --border-radius: 8px;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* --- General & Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.7;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

h1, h2, h3 {
    font-family: var(--heading-font);
    color: var(--primary-color);
    font-weight: 600;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem auto;
    font-size: 1.1rem;
    color: #555;
}

section {
    padding: 6rem 0;
}

/* --- Header & Navigation --- */
#main-header {
    background-color: var(--surface-color);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    padding: 0 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-family: var(--heading-font);
    font-size: 1.8rem;
    text-decoration: none;
    color: var(--primary-color);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 700;
    position: relative;
    padding-bottom: 5px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background-color: var(--primary-color);
    transition: all 0.3s ease-in-out;
}


/* --- Hero Section --- */
.hero {
    background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.8)), url('main.gif') center/cover no-repeat;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    padding: 0 2rem;
}

.hero h1 {
    font-size: 4.5rem;
    color: #fff;
    margin-bottom: 0.5rem;
}

.hero .subtitle {
    font-size: 1.8rem;
    font-weight: 300;
    opacity: 0.9;
}

/* --- Skills Section --- */
#skills {
    background-color: var(--surface-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    background-color: #fff;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.skill-category h3 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.skill-category i {
    margin-right: 0.75rem;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.skill-category li::before {
    content: '\f00c'; /* Font Awesome check icon */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

/* --- Profiles & Contact Section --- */
.profiles-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.profile-link, .cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--secondary-color);
    color: #fff;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.profile-link:hover, .cta-button:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
}

#contact {
    background-color: var(--primary-color);
}
#contact h2, #contact .section-intro {
    color: #fff;
}

/* --- Footer --- */
footer {
    background-color: #212f3d;
    color: #ccc;
    text-align: center;
    padding: 1.5rem;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--surface-color);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 3rem;
        transition: left 0.4s ease-in-out;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links a {
        font-size: 1.5rem;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    h2 {
        font-size: 2rem;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .hero .subtitle {
        font-size: 1.3rem;
    }
}