/* --- General Styling & CSS Variables --- */
:root {
    --primary-color: #831bcd;
    --secondary-color: #f9620b;
    --background-color: #f0f2f5;
    --surface-color: #ffffff;
    --text-color: #333;
    --heading-font: 'Poppins', sans-serif;
    --body-font: 'Poppins', sans-serif;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #e0e0e0;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding-top: 70px; /* Offset for fixed navbar */
    transition: background-color 0.3s, color 0.3s;
}

h1, h2, h3 {
    font-family: var(--heading-font);
    font-weight: 700;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* --- Animated Background --- */
#background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* --- Navigation Bar --- */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.1);
    width: 100%;
    position: fixed;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s, border-bottom 0.3s;
}

[data-theme="dark"] .navbar {
    background: rgba(30, 30, 30, 0.8);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--text-color);
    font-weight: 600;
    padding: 5px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

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

/* --- Theme Switcher --- */
.theme-toggle-label {
    display: block; position: relative; width: 50px; height: 26px; background-color: #ccc; border-radius: 50px; cursor: pointer; transition: background-color 0.3s;
}
.theme-toggle-label::after {
    content: '☀️'; position: absolute; width: 22px; height: 22px; border-radius: 50%; top: 2px; left: 2px; font-size: 14px; text-align: center; line-height: 22px; background-color: white; transition: transform 0.3s;
}
.theme-toggle-checkbox { display: none; }
.theme-toggle-checkbox:checked + .theme-toggle-label { background-color: var(--primary-color); }
.theme-toggle-checkbox:checked + .theme-toggle-label::after { content: '🌙'; transform: translateX(24px); }

/* Hamburger Menu Icon */
.hamburger {
    display: none;
    cursor: pointer;
}
.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
    background-color: var(--text-color);
}

/* --- Hero Section --- */
.hero { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    text-align: center; 
    min-height: 30vh;
    margin-top: -70px; 
    padding: 60px 20px;
    color: #fff; 
    background: linear-gradient(to right, #831bcd, #f9620b); 
}
.hero-content h1 { 
    font-size: 3.2rem;
    margin-bottom: 10px; 
}
.hero-content p { 
    font-size: 1.2rem; 
    margin-top: 20px; 
}

.typing-effect { 
    font-weight: 700; 
    border-right: 3px solid #fff; 
    animation: blink 0.7s steps(1) infinite; 
    color: #fff;
    /* font-size is now inherited from h1 for consistency */
}
@keyframes blink { 50% { border-color: transparent; } }


/* --- Content Sections --- */
.content-section { max-width: 900px; margin: 0 auto; padding: 80px 20px; text-align: center; }
.content-section h2 { font-size: 2.5rem; margin-bottom: 40px; position: relative; display: inline-block; }
.content-section h2::after { content: ''; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%); width: 60px; height: 4px; background: linear-gradient(to right, var(--primary-color), var(--secondary-color)); }

/* --- About Section --- */
.about-container { 
    display: flex; 
    align-items: center; 
    gap: 50px;
    text-align: left; 
}
.profile-pic { 
    width: 200px; 
    height: 200px; 
    border-radius: 50%;
    object-fit: cover; 
    box-shadow: var(--box-shadow); 
    border: 5px solid var(--surface-color); 
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    flex-shrink: 0;
}

.profile-pic:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}


/* --- Skills Section --- */
.skills-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
    text-align: left;
}
.skill-item h3 {
    margin-bottom: 10px;
    font-weight: 600;
}
.progress-bar-container {
    width: 100%;
    height: 25px;
    background-color: #e0e0e0;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}
[data-theme="dark"] .progress-bar-container {
    background-color: #333;
}
.progress-bar {
    height: 100%;
    width: 0; /* Initial width is 0, will be animated by JS */
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 50px;
    position: relative;
    transition: width 1.5s ease-in-out;
}

/* --- Projects Section --- */
.portfolio-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 20px; }
.portfolio-item { background: var(--surface-color); padding: 30px; border-radius: 10px; box-shadow: var(--box-shadow); text-align: left; transition: transform 0.3s, box-shadow 0.3s; }
.portfolio-item:hover { transform: translateY(-8px); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15); }
.portfolio-item h3 { margin-top: 0; }
.portfolio-item a { font-weight: 600; }

/* --- Contact Section --- */
#contact-form { max-width: 600px; margin: 40px auto; display: flex; flex-direction: column; gap: 20px; }
#contact-form input, #contact-form textarea { width: 100%; padding: 15px; border: 1px solid #ccc; border-radius: 8px; background-color: var(--surface-color); color: var(--text-color); font-family: var(--body-font); font-size: 1rem; box-sizing: border-box; }
#contact-form button { background: linear-gradient(to right, var(--primary-color), var(--secondary-color)); color: #fff; border: none; padding: 15px 20px; border-radius: 50px; cursor: pointer; font-size: 1.1rem; font-weight: 600; transition: box-shadow 0.3s, transform 0.3s; }
#contact-form button:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25); }
.social-links { margin-top: 30px; }
.logo { width: 42px; height: 42px; margin: 0 15px; transition: transform 0.3s ease; }
.logo:hover { transform: scale(1.2) rotate(5deg); }


/* --- Footer --- */
footer { background: linear-gradient(to right, var(--primary-color), var(--secondary-color)); color: #fff; padding: 20px 0; text-align: center; }

/* === NEW RULE FOR DARK MODE ICONS === */
[data-theme="dark"] .logo {
    filter: brightness(0) invert(1);
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .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);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--surface-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

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

    .nav-menu li {
        padding: 1.5rem 0;
    }

    .theme-switcher {
        margin-left: auto;
        margin-right: 20px;
    }
    
    .hero-content h1 { 
        font-size: 2.2rem;
    }
    
    .content-section { padding: 60px 20px; }
    
    .about-container { 
        flex-direction: column; 
        text-align: center;
    }
}