/* =========================================
   CSS VARIABLES & THEME SETUP
   ========================================= */

:root {
    /* --- LIGHT MODE COLORS --- */
    /* Background color of the entire page */
    --bg-color: #f8fafc;
    /* Background color of cards (slightly transparent white) */
    --card-bg: rgba(255, 255, 255, 0.9);
    /* Main text color (dark slate) */
    --text-main: #1e293b;
    /* Secondary text color (lighter grey for descriptions) */
    --text-secondary: #64748b;
    /* Primary accent color (Blue) */
    --accent-color: #3b82f6;
    /* Accent color when hovering over buttons/links */
    --accent-hover: #2563eb;
    /* Subtle border color for cards and inputs */
    --border-color: rgba(0, 0, 0, 0.08);
    
    /* --- SHADOWS --- */
    /* Small shadow for subtle depth */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    /* Medium shadow for cards */
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    /* Large shadow for floating elements (profile pic) */
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);

    /* --- COMPONENT COLORS --- */
    /* Background of individual link buttons */
    --link-bg: #ffffff;
    /* Background of link buttons when hovered */
    --link-hover: #f1f5f9;
    /* Background of the theme toggle button */
    --toggle-bg: #e2e8f0;
    /* Color of the sun/moon icon in the toggle */
    --toggle-icon: #f59e0b;
    /* Color of category headers */
    --category-color: #94a3b8;
}

/* Dark Mode Overrides */
/* These variables override the :root variables when the 'data-theme' attribute is set to 'dark' */
[data-theme="dark"] {
    --bg-color: #0f172a; /* Dark blue/slate background */
    --card-bg: rgba(30, 41, 59, 0.7); /* Semi-transparent dark card */
    --text-main: #f1f5f9; /* Off-white text */
    --text-secondary: #94a3b8; /* Light grey text */
    --accent-color: #60a5fa; /* Lighter blue accent */
    --accent-hover: #93c5fd;
    --border-color: rgba(255, 255, 255, 0.1); /* Subtle white border */
    
    /* Darker shadows for dark mode */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5);
    
    /* Dark component colors */
    --link-bg: rgba(255, 255, 255, 0.05); /* Very transparent white */
    --link-hover: rgba(255, 255, 255, 0.1);
    --toggle-bg: #334155;
    --toggle-icon: #fbbf24;
    --category-color: #cbd5e1;
}

/* =========================================
   RESET & BASE STYLES
   ========================================= */

/* Apply box-sizing: border-box to all elements for easier sizing calculations */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    /* Smooth transitions for theme switching and hover effects */
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}

body {
    /* Font stack prioritizing 'Inter', then system fonts */
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    /* Use dvh (Dynamic Viewport Height) for mobile browsers to handle address bars correctly */
    min-height: 100dvh; 
    
    /* Flexbox to center the main container horizontally */
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Align top to allow scrolling if content is long */
    overflow-x: hidden; /* Prevent horizontal scrollbar */
    position: relative;
    padding-top: 2rem;
    padding-bottom: 4rem;
}

/* =========================================
   BACKGROUND ANIMATION CANVAS
   ========================================= */

#bg-canvas {
    position: fixed; /* Fix to viewport so it stays still while scrolling */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; /* Place behind all content */
    pointer-events: none; /* Allow clicks to pass through to buttons */
}

/* =========================================
   MAIN CONTAINER
   ========================================= */

.container {
    width: 100%;
    max-width: 800px; /* Limit width on large screens */
    padding: 0 1.5rem; /* Side padding for breathing room */
    margin: 0 auto; /* Center horizontally */
    z-index: 1; /* Sit above background canvas */
    animation: fadeIn 0.8s ease-out; /* Entry animation */
}

/* Keyframes for the fade-in animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =========================================
   HEADER SECTION (Profile)
   ========================================= */

header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    background: var(--card-bg);
    backdrop-filter: blur(12px); /* Glassmorphism blur effect */
    -webkit-backdrop-filter: blur(12px); /* Safari support */
    padding: 2rem;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.profile-img-wrapper {
    display: inline-block;
    cursor: pointer;
    position: relative;
}

.profile-img {
    width: 110px;
    height: 110px;
    border-radius: 50%; /* Make image circular */
    object-fit: cover; /* Ensure image covers area without stretching */
    border: 4px solid var(--accent-color); /* Colored ring around avatar */
    padding: 4px;
    background-color: var(--card-bg);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

/* Hover effect for profile picture */
.profile-img:hover {
    transform: scale(1.05) rotate(3deg);
}

.profile-name {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    letter-spacing: -0.025em; /* Tighten letter spacing slightly */
}

.profile-bio {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 90%; /* Prevent bio from getting too wide */
    margin: 0 auto 1.5rem auto; /* Center bio block and add space below */
}

/* Share Button Styling */
.share-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.share-btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.share-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* =========================================
   LINKS GRID & CATEGORIES
   ========================================= */

.links-wrapper {
    display: flex;
    flex-direction: column; /* Stack categories vertically */
    gap: 2.5rem; /* Space between categories */
}

/* --- ENHANCED CATEGORY HEADER STYLING --- */
.category-header {
    /* --- LAYOUT & POSITIONING --- */
    position: relative; /* Needed for pseudo-element positioning */
    display: flex;
    justify-content: center; /* Center the pill horizontally */
    align-items: center;     /* Center content vertically */
    width: 100%;
    margin-bottom: 2rem; /* Increased space for a cleaner look */
    z-index: 1;
}

/* The Glassmorphism Pill Background (Pseudo-element) */
.category-header::before {
    content: '';
    position: absolute;
    inset: 0; /* Spans the full height/width of the header */
    background: var(--card-bg); /* Uses your theme's card background */
    backdrop-filter: blur(8px); /* The "Frosted Glass" effect */
    -webkit-backdrop-filter: blur(8px);
    border-radius: 50px; /* Fully rounded pill shape */
    border: 1px solid rgba(255, 255, 255, 0.1); /* Subtle highlight border */
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.05), /* Soft drop shadow */
        inset 0 1px 0 rgba(255, 255, 255, 0.1); /* Inner highlight for 3D feel */
    z-index: -1; /* Places background behind the text */
}

/* The Text Styling inside the header */
.category-header span {
    display: block;
    font-size: 0.75rem; /* Slightly smaller for elegance */
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em; /* Wide spacing looks more "luxury" */
    
    /* Text Gradient Effect (Makes text look metallic/vibrant) */
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    
    padding: 0.6rem 1.5rem; /* Generous padding inside the pill */
    
    /* Subtle entrance animation */
    animation: fadeInPill 1s ease-out forwards;
    opacity: 0;
    transform: translateY(-10px);
}

/* Animation Keyframes for the Header Text */
@keyframes fadeInPill {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dark Mode Specific Tweaks for the Glass Effect */
[data-theme="dark"] .category-header::before {
    background: rgba(30, 41, 59, 0.6); /* Darker glass for dark mode */
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.links-grid {
    display: grid;
    grid-template-columns: 1fr; /* Default: 1 column (Mobile) */
    gap: 1rem; /* Space between cards */
}

/* Tablet: 2 columns */
@media (min-width: 600px) {
    .links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Desktop: 3 columns */
@media (min-width: 900px) {
    .links-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* =========================================
   LINK CARD DESIGN
   ========================================= */

.link-card {
    display: flex; /* Use Flexbox to align icon, text, and arrow */
    align-items: center; /* Vertically center items */
    justify-content: flex-start; /* Align items to the left (Desktop default) */
    background-color: var(--link-bg);
    padding: 1.25rem;
    border-radius: 16px;
    text-decoration: none; /* Remove underline from links */
    color: var(--text-main);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); /* Smooth hover animation */
    height: 100%; /* Ensure cards in a row have equal height */
}

/* Hover state for cards */
.link-card:hover {
    transform: translateY(-4px); /* Lift card up slightly */
    background-color: var(--link-hover);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

/* Active/Click state for cards */
.link-card:active {
    transform: scale(0.98); /* Shrink slightly when clicked */
}

/* --- Icon Styling --- */
.link-icon {
    width: 28px;
    height: 28px;
    fill: var(--text-main); /* SVG fill color */
    flex-shrink: 0; /* Prevent icon from shrinking */
    margin-right: 1rem; /* Space between icon and text */
    transition: fill 0.3s ease;
}

/* Change icon color on card hover */
.link-card:hover .link-icon {
    fill: var(--accent-color);
}

/* --- Text Styling --- */
.link-text {
    flex-grow: 1; /* Allow text to take up remaining space */
    font-weight: 600;
    font-size: 0.95rem;
    text-align: left; /* Default text alignment */
}

/* --- Arrow Icon Styling --- */
.link-arrow {
    width: 18px;
    height: 18px;
    fill: var(--text-secondary);
    opacity: 0; /* Hidden by default */
    transform: translateX(-10px); /* Start slightly to the left */
    transition: all 0.3s ease;
}

/* Show arrow on hover */
.link-card:hover .link-arrow {
    opacity: 1;
    transform: translateX(0); /* Move to natural position */
}

/* =========================================
   MOBILE ADJUSTMENTS (FIX)
   ========================================= */

@media (max-width: 600px) {
    /* Center the content inside the card */
    .link-card {
        justify-content: center;
        flex-direction: column; /* Stack icon and text vertically */
        text-align: center;
        padding: 1rem 1.25rem; /* Adjust padding for vertical layout */
    }

    /* Adjust icon spacing for vertical stack */
    .link-icon {
        margin-right: 0; /* Remove right margin */
        margin-bottom: 0.5rem; /* Add bottom margin for spacing */
    }

    /* Center the text itself */
    .link-text {
        text-align: center;
    }

    /* Hide the arrow on mobile to keep it clean */
    .link-arrow {
        display: none;
    }
}

/* =========================================
   FOOTER & CONTROLS
   ========================================= */

footer {
    margin-top: 4rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column; /* Stack footer elements vertically */
    align-items: center;
    gap: 1.5rem;
    padding-bottom: 2rem;
}

/* Container for Theme and QR buttons to align them side-by-side */
.footer-controls {
    display: flex;
    gap: 1rem; /* Space between buttons */
    align-items: center;
    justify-content: center;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    padding: 0.75rem;
    border-radius: 50%; /* Make button circular */
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(15deg) scale(1.1); /* Rotate and grow on hover */
    background-color: var(--link-hover);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    fill: var(--toggle-icon);
}

/* QR Code Button */
.qr-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    padding: 0.75rem;
    border-radius: 50%; /* Make button circular */
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.qr-btn:hover {
    transform: scale(1.1); /* Grow on hover */
    background-color: var(--link-hover);
}

.qr-btn svg {
    width: 20px;
    height: 20px;
    fill: var(--text-main); /* Use main text color for QR icon */
}

/* Legal Links Styling */
.legal-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.legal-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    text-decoration: underline;
    transition: color 0.2s;
}

.legal-btn:hover {
    color: var(--accent-color);
}

.separator {
    opacity: 0.5;
}

/* =========================================
   CREDITS & DISCLOSURE
   ========================================= */

.credits-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem; /* Space between the copyright and AI disclosure */
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    width: 100%;
}

/* Update existing GitHub Credit to be part of the flex column */
.github-credit {
    opacity: 0.8;
    font-weight: 500;
    text-align: center;
}

.github-credit a {
    color: var(--text-main); /* Make the name stand out more */
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.github-credit a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* AI Disclosure Styling */
.ai-disclosure {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap; /* Allows wrapping on very small screens */
    gap: 0.3rem;
    opacity: 0.6;
    font-size: 0.75rem; /* Slightly smaller text for the disclosure */
}

.ai-disclosure a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px dotted var(--text-secondary); /* Dotted underline for a subtle technical look */
    transition: all 0.2s ease;
}

.ai-disclosure a:hover {
    color: var(--accent-color);
    border-bottom-style: solid;
}

/* =========================================
   MODALS (Legal & QR)
   ========================================= */

.modal {
    display: none; /* Hidden by default */
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.6); /* Black with opacity */
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

/* When active, display as flex to center content */
.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    margin: auto;
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.close-modal {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 1rem;
    right: 1.5rem;
}

.close-modal:hover {
    color: var(--text-main);
}

.modal-body h2 {
    margin-bottom: 1rem;
    color: var(--text-main);
}

.modal-body p {
    margin-bottom: 0.8rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

/* QR Code Specifics */
.qr-modal-content {
    text-align: center;
    max-width: 300px;
}

.qr-placeholder {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    display: inline-block;
}

.qr-placeholder img {
    display: block;
    width: 200px;
    height: 200px;
}

.qr-caption {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* =========================================
   TOAST NOTIFICATION
   ========================================= */

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background-color: var(--text-main);
    color: var(--bg-color);
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
    font-weight: 500;
}

.toast:not(.hidden) {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* =========================================
   CREDITS BACK TO TOP BUTTON
   ========================================= */

.credits-back-to-top {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none; /* No underline initially */
    transition: color 0.2s ease, text-decoration 0.2s ease;
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.credits-back-to-top:hover {
    color: var(--accent-color);
    text-decoration: underline; /* Underline on hover */
}

.credits-back-to-top svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}