:root {
    /* Light Mode */
    --bg-color-light-start: #E0E7FF; /* Pastel Blueish */
    --bg-color-light-mid1: #D8BFD8;  /* Pastel Grayish Thistle/Lavender */
    --bg-color-light-mid2: #FFE4C4;  /* Pastel Grayish Orange (Bisque) */
    --bg-color-light-end: #ADD8E6;   /* Lighter Pastel Blue */

    --card-bg-color-light: rgba(255, 255, 255, 0.9); /* Slightly transparent for depth */
    --text-color-light: #18283B; /* Darker blueish gray for better contrast on gradient */
    --primary-accent-light: #6A8EAE; /* Muted Blue, good on light complex bg */
    --secondary-accent-light: #B0C4DE; /* Lighter Muted Blue */
    --border-color-light: #D0D8E0;
    --shadow-color-light: rgba(50, 50, 93, 0.15);
    --icon-color-light: #5A768F;
    --title-color-light: #FFFFFF; /* For brand name */

    /* Dark Mode (Soft Dark) */
    --bg-color-dark-start: #1A2238; /* Deep Indigo */
    --bg-color-dark-mid1: #2A3457; /* Darker Grayish Blue */
    --bg-color-dark-mid2: #4A4E69; /* Grayish Purple */
    --bg-color-dark-end: #1E3A5F;   /* Dark Slate Blue */

    --card-bg-color-dark: rgba(44, 48, 52, 0.9); /* Slightly transparent */
    --text-color-dark: #E0E7FF;
    --primary-accent-dark: #8DA9C4;
    --secondary-accent-dark: #607A93;
    --border-color-dark: #4A5568;
    --shadow-color-dark: rgba(0, 0, 0, 0.3);
    --icon-color-dark: #A0B3CA;
    --title-color-dark: #FFFFFF; /* For brand name */

    /* Global */
    --font-family-main: 'Inter', sans-serif;
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

/* Apply current theme */
body {
    /* Gradient Background */
    background: linear-gradient(135deg, 
        var(--bg-color-start, var(--bg-color-light-start)), 
        var(--bg-color-mid1, var(--bg-color-light-mid1)) 25%, 
        var(--bg-color-mid2, var(--bg-color-light-mid2)) 50%, 
        var(--bg-color-mid1, var(--bg-color-light-mid1)) 75%, 
        var(--bg-color-end, var(--bg-color-light-end))
    );
    background-attachment: fixed; /* Key for basic parallax on gradient */

    color: var(--text-color, var(--text-color-light));
    font-family: var(--font-family-main);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    transition: background var(--transition-speed) ease, color var(--transition-speed) ease; /* Animate gradient change */
    overflow-x: hidden;
    position: relative; /* For stacking context of parallax elements */
}

/* Dark Mode Styles */
body.dark-mode {
    --bg-color-start: var(--bg-color-dark-start);
    --bg-color-mid1: var(--bg-color-dark-mid1);
    --bg-color-mid2: var(--bg-color-dark-mid2);
    --bg-color-end: var(--bg-color-dark-end);

    --card-bg-color: var(--card-bg-color-dark);
    --text-color: var(--text-color-dark);
    --primary-accent: var(--primary-accent-dark);
    --secondary-accent: var(--secondary-accent-dark);
    --border-color: var(--border-color-dark);
    --shadow-color: var(--shadow-color-dark);
    --icon-color: var(--icon-color-dark);
    --title-color: var(--title-color-dark);
}

/* Light Mode (default) Styles */
body:not(.dark-mode) {
    --bg-color-start: var(--bg-color-light-start);
    --bg-color-mid1: var(--bg-color-light-mid1);
    --bg-color-mid2: var(--bg-color-light-mid2);
    --bg-color-end: var(--bg-color-light-end);
    
    --card-bg-color: var(--card-bg-color-light);
    --text-color: var(--text-color-light);
    --primary-accent: var(--primary-accent-light);
    --secondary-accent: var(--secondary-accent-light);
    --border-color: var(--border-color-light);
    --shadow-color: var(--shadow-color-light);
    --icon-color: var(--icon-color-light);
    --title-color: var(--title-color-light);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Parallax Background Elements Container */
.parallax-bg {
    position: fixed; /* Changed from absolute to fixed for true viewport attachment */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; /* Behind all content */
    overflow: hidden; /* Prevent shapes from causing scrollbars if they exceed viewport */
    pointer-events: none; /* So they don't interfere with interactions */
}

/* Geometric Shapes for Parallax */
.geometric-shape {
    position: absolute;
    border-radius: 30%; /* Soft, organic shapes */
    filter: blur(60px); /* Heavy blur */
    opacity: 0.3; /* Subtle */
    /* Animation will be handled by JS for smoother parallax */
}

/* Define shapes (colors will adapt with theme through accent variables) */
.shape1 {
    width: 400px;
    height: 400px;
    background-color: var(--primary-accent, var(--primary-accent-light));
    top: 10%;
    left: 5%;
    transform: translateZ(-2px); /* For potential 3D parallax via JS */
}

.shape2 {
    width: 300px;
    height: 300px;
    background-color: var(--secondary-accent, var(--secondary-accent-light));
    top: 50%;
    left: 60%;
    border-radius: 50% 20% 40% 30%;
    transform: translateZ(-1px);
}

.shape3 {
    width: 250px;
    height: 250px;
    background-color: var(--primary-accent, var(--primary-accent-light));
    opacity: 0.2;
    top: 20%;
    left: 80%;
    border-radius: 20% 50% 30% 40%;
    transform: translateZ(-3px);
}
.shape4 {
    width: 350px;
    height: 350px;
    background-color: var(--secondary-accent, var(--secondary-accent-light));
    opacity: 0.25;
    top: 70%;
    left: 15%;
    border-radius: 40% 30% 50% 20%;
    transform: translateZ(-1.5px);
}


/* Main content container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    position: relative; /* Ensure it's above the parallax-bg */
    z-index: 1;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 20px;
    position: relative;
}

.brand-name {
    font-size: 3rem; /* Slightly larger */
    font-weight: 700;
    color: var(--title-color, var(--title-color-light)); /* WHITE */
    margin-bottom: 5px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2); /* Subtle shadow for readability on gradient */
}

.tagline {
    font-size: 1.1rem;
    font-weight: 400; /* Slightly bolder */
    color: var(--text-color, var(--text-color-light));
    opacity: 0.95;
    text-shadow: 0 1px 5px rgba(0,0,0,0.1);
}

/* Theme Switcher */
.theme-switcher {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 10; /* Above other header content */
}

#theme-toggle {
    background-color: var(--card-bg-color, var(--card-bg-color-light)); /* Button background */
    border: 1px solid var(--border-color, var(--border-color-light));
    color: var(--icon-color, var(--icon-color-light));
    font-size: 1.2rem;
    padding: 8px 10px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
    box-shadow: 0 2px 5px var(--shadow-color, var(--shadow-color-light));
}

#theme-toggle:hover {
    background-color: var(--primary-accent, var(--primary-accent-light));
    color: #fff; /* White icon on hover */
    border-color: var(--primary-accent, var(--primary-accent-light));
}

/* Grid Cards (GitHub, LinkedIn, etc.) */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.card {
    background-color: var(--card-bg-color, var(--card-bg-color-light));
    border-radius: var(--border-radius);
    padding: 25px;
    text-align: center;
    box-shadow: 0 8px 25px var(--shadow-color, var(--shadow-color-light)); /* Enhanced shadow */
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    border: 1px solid var(--border-color, var(--border-color-light));
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    backdrop-filter: blur(5px); /* Frosted glass effect for cards */
    -webkit-backdrop-filter: blur(5px); /* Safari */
}

.card:hover {
    transform: translateY(-10px) scale(1.03); /* More pronounced hover */
    box-shadow: 0 12px 35px var(--shadow-color, var(--shadow-color-light));
}

.card-icon {
    font-size: 2.5rem;
    color: var(--primary-accent, var(--primary-accent-light));
    margin-bottom: 15px;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color, var(--text-color-light));
}

.card-description {
    font-size: 0.95rem;
    margin-bottom: 20px;
    color: var(--text-color, var(--text-color-light));
    opacity: 0.85; /* Slightly more opaque */
    flex-grow: 1;
}

.card-link {
    display: inline-block;
    background-color: var(--primary-accent, var(--primary-accent-light));
    color: #FFFFFF; /* White text for better contrast */
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
    margin-bottom: 10px;
}

.card-link:hover {
    background-color: color-mix(in srgb, var(--primary-accent, var(--primary-accent-light)) 80%, black);
    transform: scale(1.05);
}

.copy-btn {
    background-color: var(--secondary-accent, var(--secondary-accent-light));
    color: var(--text-color, var(--text-color-light));
    border: none;
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease;
}

.copy-btn i {
    margin-right: 5px;
}

.copy-btn:hover {
    background-color: color-mix(in srgb, var(--secondary-accent, var(--secondary-accent-light)) 80%, black);
}

/* Single Card (Bio) */
.card-single {
    background-color: var(--card-bg-color, var(--card-bg-color-light));
    border-radius: var(--border-radius);
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 8px 25px var(--shadow-color, var(--shadow-color-light));
    border: 1px solid var(--border-color, var(--border-color-light));
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.section-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
    color: var(--primary-accent, var(--primary-accent-light));
}

.bio-section p {
    font-size: 1.05rem;
    line-height: 1.7;
    text-align: justify;
}

/* Projects Section */
.projects-section {
    margin-bottom: 40px;
}

.project-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.project-card {
    background-color: var(--card-bg-color, var(--card-bg-color-light));
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 8px 25px var(--shadow-color, var(--shadow-color-light));
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    border: 1px solid var(--border-color, var(--border-color-light));
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.project-card:hover {
    transform: translateY(-8px); /* Consistent hover with other cards */
    box-shadow: 0 12px 35px var(--shadow-color, var(--shadow-color-light));
}

.project-image {
    width: 100%;
    height: 180px;
    background-color: var(--secondary-accent, var(--secondary-accent-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color, var(--text-color-light));
}
.project-image.placeholder-img::before {
    content: "Project Image";
    font-style: italic;
    opacity: 0.7;
}

.project-card .project-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 15px 20px 10px;
    color: var(--text-color, var(--text-color-light));
}

.project-description {
    font-size: 0.9rem;
    padding: 0 20px 15px;
    opacity: 0.85;
    flex-grow: 1;
    line-height: 1.5;
}

.project-links {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color, var(--border-color-light));
    display: flex;
    gap: 15px;
    /* Slightly different background for link area to distinguish it */
    background-color: color-mix(in srgb, var(--card-bg-color, var(--card-bg-color-light)) 90%, var(--border-color, var(--border-color-light)) 10%);
}

.project-link {
    color: var(--primary-accent, var(--primary-accent-light));
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed) ease;
}

.project-link i {
    margin-right: 6px;
}

.project-link:hover {
    color: color-mix(in srgb, var(--primary-accent, var(--primary-accent-light)) 70%, black);
    text-decoration: underline;
}

/* CV Button Section */
.cv-section {
    text-align: center;
    margin-bottom: 40px;
}

.cv-button {
    display: inline-block;
    background-color: var(--primary-accent, var(--primary-accent-light));
    color: #FFFFFF; /* White text */
    padding: 15px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    box-shadow: 0 6px 15px var(--shadow-color, var(--shadow-color-light));
}

.cv-button i {
    margin-right: 8px;
}

.cv-button:hover {
    background-color: color-mix(in srgb, var(--primary-accent, var(--primary-accent-light)) 80%, black);
    transform: translateY(-4px) scale(1.03); /* Slightly more pop */
    box-shadow: 0 8px 20px var(--shadow-color, var(--shadow-color-light));
}

/* Footer */
footer {
    text-align: center;
    padding: 25px 0;
    border-top: 1px solid var(--border-color, var(--border-color-light));
    font-size: 0.9rem;
    opacity: 0.8; /* Slightly less opacity for better readability */
    background-color: rgba(255,255,255,0.1); /* Subtle bg for footer on complex background */
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}
body.dark-mode footer {
    background-color: rgba(0,0,0,0.1);
}
footer p {
    margin-bottom: 5px;
}

/* Custom Cursor */
.cursor-dot, .cursor-outline {
    pointer-events: none;
    position: fixed;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    opacity: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease-in-out, transform 0.2s ease-in-out, border-color 0.3s ease, background-color 0.3s ease; /* Added border/bg transition */
    z-index: 9999;
}
@media (hover: hover) and (pointer: fine) {
    body {
        cursor: none;
    }
    .cursor-dot {
        width: 8px;
        height: 8px;
        background-color: var(--primary-accent, var(--primary-accent-light));
    }
    .cursor-outline {
        width: 30px;
        height: 30px;
        border: 2px solid var(--primary-accent, var(--primary-accent-light));
        opacity: 0.5;
    }
    body:hover .cursor-dot, body:hover .cursor-outline {
        opacity: 1;
    }
}

/* Copy Notification */
.copy-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-color, var(--text-color-light));
    color: var(--bg-color-start, var(--bg-color-light-start)); /* Use a bg color for text */
    padding: 10px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease, bottom 0.3s ease;
    pointer-events: none;
}

.copy-notification.show {
    opacity: 1;
    bottom: 30px;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .brand-name {
        font-size: 2.5rem;
    }
    .tagline {
        font-size: 1rem;
    }
    .grid-cards, .project-cards-container {
        grid-template-columns: 1fr;
    }
    .theme-switcher {
        top: 15px;
        right: 15px;
    }
    #theme-toggle {
        font-size: 1rem;
        padding: 6px 8px;
    }
    .geometric-shape { /* Reduce size and blur for mobile */
        filter: blur(40px);
        opacity: 0.2;
    }
    .shape1 { width: 250px; height: 250px; }
    .shape2 { width: 200px; height: 200px; }
    .shape3 { width: 180px; height: 180px; }
    .shape4 { width: 220px; height: 220px; }

}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    .brand-name {
        font-size: 2.2rem;
    }
    .card, .card-single, .project-card {
        padding: 20px;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .cv-button {
        padding: 12px 25px;
        font-size: 1rem;
    }
     .geometric-shape {
        filter: blur(30px);
        opacity: 0.15;
    }
    .shape1 { width: 200px; height: 200px; }
    .shape2 { width: 150px; height: 150px; }
    .shape3 { display: none; } /* Hide one on very small screens */
    .shape4 { width: 180px; height: 180px; }
}