:root {
    /* Color System */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #a855f7;
    --secondary-light: #c084fc;
    --secondary-dark: #9333ea;
    --accent: #ec4899;
    --accent-light: #f472b6;
    --accent-dark: #db2777;

    /* Theme TRANSITION VARIABLES */
    --theme-transition-duration: 3s;
    --theme-transition-easing: cubic-bezier(0.68, -0.55, 0.27, 1.55);

    /* Theme Variables */
    --light-bg-start: #f9fafb;
    --light-bg-end: #f3f4f6;
    --light-text: #1f2937;
    --light-text-secondary: #4b5563;
    --dark-bg-start: #111827;
    --dark-bg-end: #1f2937;
    --dark-text: #e5e7eb;
    --dark-text-secondary: #9ca3af;
    --contrast-bg-start: #000000;
    --contrast-bg-end: #1a1a1a;
    --contrast-text: #ffffff;
    --contrast-text-secondary: #d1d5db;

    /* Glassmorphism */
    --glass-light: rgba(255, 255, 255, 0.2);
    --glass-light-border: rgba(255, 255, 255, 0.3);
    --glass-dark: rgba(40, 48, 68, 0.25);
    --glass-dark-border: rgba(255, 255, 255, 0.1);
    --glass-contrast: rgba(50, 50, 50, 0.3);
    --glass-contrast-border: rgba(255, 255, 255, 0.15);

    /* Animation */
    --transition-fast: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in-out: cubic-bezier(0.87, 0, 0.13, 1);

    /* Typography */
    --text-base: 1rem;
    --text-scale: 1.25;
    --text-xs: calc(var(--text-base) / var(--text-scale));
    --text-sm: calc(var(--text-base));
    --text-md: calc(var(--text-base) * var(--text-scale));
    --text-lg: calc(var(--text-md) * var(--text-scale));
    --text-xl: calc(var(--text-lg) * var(--text-scale));
    --text-2xl: calc(var(--text-xl) * var(--text-scale));
    --text-3xl: calc(var(--text-2xl) * var(--text-scale));
    --text-4xl: calc(var(--text-3xl) * var(--text-scale));
    --text-5xl: calc(var(--text-4xl) * var(--text-scale));
}

/* Global Reset for Mobile Tap Highlight */
* {
    -webkit-tap-highlight-color: transparent;
}

html.theme-transitioning {
    --transition-fast: all 1s var(--ease-out) !important;
    --transition-base: all 1s var(--ease-out) !important;
    --transition-slow: all 1s var(--ease-out) !important;
}

html.theme-transitioning,
html.theme-transitioning body,
html.theme-transitioning .glass-card {
    transition:
        background-color 1s var(--ease-out),
        background-image 1s var(--ease-out),
        color 1s var(--ease-out),
        border-color 1s var(--ease-out),
        box-shadow 1s var(--ease-out) !important;
}

html.is-transitioning {
    pointer-events: none;
}

html.is-transitioning,
html.is-transitioning body,
html.is-transitioning .glass-card,
html.is-transitioning .glass-card * {
    transition:
        background-color var(--theme-transition-duration) var(--theme-transition-easing),
        background-image var(--theme-transition-duration) var(--theme-transition-easing),
        color var(--theme-transition-duration) var(--theme-transition-easing),
        border-color var(--theme-transition-duration) var(--theme-transition-easing),
        box-shadow var(--theme-transition-duration) var(--theme-transition-easing),
        fill var(--theme-transition-duration) var(--theme-transition-easing),
        stroke var(--theme-transition-duration) var(--theme-transition-easing),
        opacity var(--theme-transition-duration) var(--theme-transition-easing) !important;
}

html.is-transitioning h1,
html.is-transitioning h2,
html.is-transitioning h3,
html.is-transitioning p,
html.is-transitioning a {
    transition:
        color var(--theme-transition-duration) var(--theme-transition-easing),
        text-shadow var(--theme-transition-duration) var(--theme-transition-easing) !important;
}

::selection {
    background-color: var(--primary);
    color: white;
    transition: all var(--theme-transition-duration) var(--theme-transition-easing);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    transition:
        background-color var(--theme-transition-duration) var(--theme-transition-easing),
        color var(--theme-transition-duration) var(--theme-transition-easing);
}

body {
    font-family: 'Montserrat', sans-serif;
    overflow-x: hidden;
    background-image: linear-gradient(to bottom right, var(--bg-start, var(--light-bg-start)), var(--bg-end, var(--light-bg-end)));
    color: var(--text-color, var(--light-text));
    transition: background-image 0.5s ease, color 0.5s ease;
    font-size: var(--text-base);
    line-height: 1.6;
}

/* Theme Application */
html.light {
    --bg-start: var(--light-bg-start);
    --bg-end: var(--light-bg-end);
    --text-color: var(--light-text);
    --text-secondary: var(--light-text-secondary);
    --glass-bg: var(--glass-light);
    --glass-border: var(--glass-light-border);
}

html.dark {
    --bg-start: var(--dark-bg-start);
    --bg-end: var(--dark-bg-end);
    --text-color: var(--dark-text);
    --text-secondary: var(--dark-text-secondary);
    --glass-bg: var(--glass-dark);
    --glass-border: var(--glass-dark-border);
}

html.contrast {
    --bg-start: var(--contrast-bg-start);
    --bg-end: var(--contrast-bg-end);
    --text-color: var(--contrast-text);
    --text-secondary: var(--contrast-text-secondary);
    --glass-bg: var(--glass-contrast);
    --glass-border: var(--glass-contrast-border);
}

/* Typography System */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5em;
}

h1 {
    font-size: var(--text-5xl);
}

h2 {
    font-size: var(--text-4xl);
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

.heading-font {
    font-family: 'Playfair Display', serif;
    letter-spacing: -0.03em;
}

.mono-font {
    font-family: 'JetBrains Mono', monospace;
}

/* Glass Card - Enhanced */
.glass-card {
    background: linear-gradient(135deg,
            var(--glass-bg, var(--glass-light)),
            rgba(255, 255, 255, 0.05));
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border-radius: 24px;
    border: 1px solid var(--glass-border, var(--glass-light-border));
    box-shadow: 0 12px 32px -12px rgba(31, 38, 135, 0.1);
    transition: background 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
    overflow: hidden;
    color: inherit;
    position: relative;
    z-index: 1;
}

html.dark .glass-card {
    box-shadow: 0 12px 48px -16px rgba(0, 0, 0, 0.3);
}

html.contrast .glass-card {
    box-shadow: 0 8px 24px -8px rgba(200, 200, 200, 0.2);
    backdrop-filter: blur(10px) saturate(120%);
}

.theme-transition {
    --transition-fast: all 0.5s ease !important;
    --transition-base: all 0.5s ease !important;
    --transition-slow: all 0.5s ease !important;
}

.theme-transition * {
    transition: color 0.5s ease, background-color 0.5s ease, border-color 0.5s ease !important;
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(45deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 300% 300%;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

/* Advanced Hover Effects */
.hover-multi-effect {
    transition: var(--transition-base);
    transform-style: preserve-3d;
    position: relative;
    z-index: 1;
}


/* Only apply complex 3D hover effects on devices that support hover (Desktop) */
@media (hover: hover) and (pointer: fine) {
    .hover-multi-effect:hover {
        transform: perspective(1000px) rotateX(5deg) rotateY(5deg) scale(1.03);
        box-shadow: 0 25px 50px -12px rgba(99, 102, 241, 0.3);
    }
}


.hover-multi-effect::before {
    content: '';
    position: absolute;
    inset: -5px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    z-index: -1;
    filter: blur(20px);
    opacity: 0;
    transition: opacity var(--transition-base), filter var(--transition-base);
    border-radius: inherit;
}

.hover-multi-effect:hover::before {
    opacity: 0.4;
    filter: blur(30px);
}

/* Floating Animation */
@keyframes float {

    0%,
    100% {
        transform: translateY(0) rotate(-1deg);
    }

    50% {
        transform: translateY(-25px) rotate(1deg);
    }
}

.floating {
    animation: float 9s var(--ease-out) infinite;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

html.dark ::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--primary), var(--secondary));
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

/* Tab Navigation */
.tab-button {
    position: relative;
    overflow: hidden;
    padding: 0.75rem 1.5rem;
    transition: color var(--transition-fast);
    border-radius: 999px;
}

.tab-button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.4s var(--ease-out);
}

.tab-button.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.tab-button.active::after {
    width: 70%;
}

.tab-button:not(.active):hover {
    color: var(--secondary);
    background: rgba(168, 85, 247, 0.1);
}

/* Masonry Grid */
.masonry-grid {
    column-count: 3;
    column-gap: 2rem;
    perspective: 1000px;
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: 2rem;
    transition: transform var(--transition-slow), opacity 0.3s ease;
    opacity: 1;
    transform-style: preserve-3d;
    will-change: transform, opacity;
}

.masonry-item.filtered-out {
    display: none !important;
}

.masonry-item.hidden {
    opacity: 0;
    transform: translateY(20px);
    height: 0;
    margin-bottom: 0;
    pointer-events: none;
}

.masonry-item>.glass-card {
    height: 100%;
}

/* Timeline */
.timeline-item {
    position: relative;
    padding-left: 4.5rem;
    padding-bottom: 2rem;
    --timeline-line-scale: 0;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(1.25rem - 1.5px);
    top: 2.5rem;
    height: calc(100% - 1rem);
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    transform: scaleY(var(--timeline-line-scale));
    transform-origin: top;
    transition: transform 1s var(--ease-out);
    opacity: 0.6;
}

.timeline-item:last-child::before {
    display: none;
}

.timeline-dot {
    position: absolute;
    left: 0;
    top: 0;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 0 0 5px var(--glass-bg);
}

/* Horizontal Scrolling */
.horizontal-scroll-container {
    position: relative;
    overflow: hidden;
    padding-bottom: 2rem;
}

.horizontal-scroll {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 1rem;
    will-change: transform;
}

.horizontal-scroll::-webkit-scrollbar {
    display: none;
}

.scroll-item {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    font-size: 14px;
    z-index: 2;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0) translateX(-50%);
    }

    40% {
        transform: translateY(-20px) translateX(-50%);
    }

    60% {
        transform: translateY(-10px) translateX(-50%);
    }
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--text-secondary);
    border-radius: 15px;
    margin-bottom: 10px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--text-secondary);
    border-radius: 2px;
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        top: 5px;
        opacity: 1;
    }

    100% {
        top: 15px;
        opacity: 0;
    }
}

.scroll-item:last-child {
    margin-right: 0;
}

/* Particle Canvas */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    opacity: 0.3;
    pointer-events: none;
}

html.dark #particle-canvas {
    opacity: 0.2;
}

/* Theme Switcher */
.theme-toggle-button {
    position: relative;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--glass-border, var(--glass-light-border));
    background: var(--glass-bg, var(--glass-light));
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.theme-toggle-button i {
    position: absolute;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    font-size: 1.25rem;
}

.theme-toggle-button .fa-sun {
    color: #f59e0b;
}

.theme-toggle-button .fa-moon {
    color: var(--primary);
}

.theme-toggle-button .fa-adjust {
    color: var(--secondary);
}

/* Initially hide inactive icons */
html.light .theme-toggle-button .fa-moon,
html.light .theme-toggle-button .fa-adjust {
    opacity: 0;
    transform: scale(0.5) rotate(-90deg);
}

html.dark .theme-toggle-button .fa-sun,
html.dark .theme-toggle-button .fa-adjust {
    opacity: 0;
    transform: scale(0.5) rotate(-90deg);
}

html.contrast .theme-toggle-button .fa-sun,
html.contrast .theme-toggle-button .fa-moon {
    opacity: 0;
    transform: scale(0.5) rotate(-90deg);
}

/* Show active icon */
html.light .theme-toggle-button .fa-sun,
html.dark .theme-toggle-button .fa-moon,
html.contrast .theme-toggle-button .fa-adjust {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

/* Accordion */
.accordion-item {
    border-bottom: 1px solid var(--glass-border);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    padding: 1.5rem 0.5rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-header:hover {
    background-color: rgba(128, 128, 128, 0.05);
}

.accordion-header h5 {
    margin-right: 1rem;
}

.accordion-header i {
    transition: transform var(--transition-base);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s var(--ease-out), padding 0.6s var(--ease-out);
}

.accordion-content>div {
    padding: 0 0.5rem 1.5rem;
}

.accordion-item.active .accordion-header i {
    transform: rotate(180deg);
}

/* CTA Button */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-image: linear-gradient(to right, var(--primary) 0%, var(--secondary) 50%, var(--primary) 100%);
    background-size: 200% auto;
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 999px;
    transition: all var(--transition-base);
    box-shadow: 0 4px 15px 0 rgba(99, 102, 241, 0.4);
    transform: scale(1);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(to right, var(--primary-dark) 0%, var(--secondary-dark) 50%, var(--primary-dark) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.cta-button:hover {
    background-position: right center;
    box-shadow: 0 10px 20px rgba(168, 85, 247, 0.3);
    transform: scale(1.03);
}

.cta-button:hover::before {
    opacity: 1;
}

.cta-button i {
    margin-left: 0.75rem;
    transition: transform 0.3s ease;
}

.cta-button:hover i {
    transform: translateX(4px);
}

/* Form Elements */
.form-input {
    width: 100%;
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.9rem 1.25rem;
    transition: var(--transition-fast);
    color: inherit;
}

.form-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

html.dark .form-input::placeholder {
    opacity: 0.4;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
    background-color: rgba(255, 255, 255, 0.05);
}

html.dark .form-input:focus {
    background-color: rgba(0, 0, 0, 0.1);
}

/* Diagonal Section */
.diagonal-section {
    position: relative;
    overflow: hidden;
    z-index: 0;
}

.diagonal-section::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: 0;
    width: 100%;
    height: 200px;
    background: inherit;
    transform: skewY(-3deg);
    z-index: -1;
}

/* Zigzag Layout */
.zigzag-item {
    margin-bottom: 6rem;
    position: relative;
}

/* Decorative Shapes */
.decorative-shape {
    position: absolute;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    filter: blur(30px);
    opacity: 0.1;
    z-index: -1;
    animation: morph 15s ease infinite alternate;
}

.decorative-shape-1 {
    bottom: -2rem;
    right: -2rem;
    width: 10rem;
    height: 10rem;
    background-color: var(--primary);
}

.decorative-shape-2 {
    top: -2rem;
    left: -2rem;
    width: 8rem;
    height: 8rem;
    background-color: var(--secondary);
    animation-direction: alternate-reverse;
    animation-duration: 12s;
}

@keyframes morph {
    0% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
        transform: rotate(0deg) scale(1);
    }

    100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
        transform: rotate(15deg) scale(1.1);
    }
}

/* Social Icons */
.social-icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--glass-bg);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.social-icon-link:hover {
    transform: scale(1.15) translateY(-2px);
    background-color: rgba(99, 102, 241, 0.2);
}

/* Cursor */
.cursor-dot {
    position: fixed;
    width: 10px;
    height: 10px;
    background-color: currentColor;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: transform 0.15s ease, width 0.3s ease, height 0.3s ease, background-color 0.3s ease;
    mix-blend-mode: difference;
}

/* Success Message */
@keyframes fadeInUpNow {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUpNow {
    animation: fadeInUpNow 0.5s ease-out forwards;
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
    .masonry-grid {
        column-count: 3;
    }
}

@media (max-width: 768px) {
    .masonry-grid {
        column-count: 1;
    }

    /* Reduce padding on sections */
    section {
        padding-top: 4rem !important;
        padding-bottom: 4rem !important;
    }

    #home {
        padding-top: 10rem !important;
        align-items: flex-start !important;
    }

    .scroll-item {
        flex: 0 0 90%;
    }

    .zigzag-item {
        flex-direction: column !important;
    }

    .zigzag-item>div {
        width: 100%;
    }

    .zigzag-item>div:first-child {
        order: 1 !important;
        margin-bottom: 2rem;
    }

    .zigzag-item>div:last-child {
        order: 2 !important;
    }

    .decorative-shape-1,
    .decorative-shape-2 {
        width: 6rem;
        height: 6rem;
    }

    h1 {
        font-size: var(--text-3xl) !important;
    }

    h2 {
        font-size: var(--text-2xl) !important;
    }

    h3 {
        font-size: var(--text-xl) !important;
    }

    /* Optimized Mobile Timeline */
    .timeline-item {
        padding-left: 2.5rem;
    }

    .timeline-item::before {
        left: calc(0.75rem - 1.5px);
        top: 1.5rem;
        /* Start immediately after the smaller dot */
        height: 100%;
        /* Extend fully to the next item */
    }

    .timeline-dot {
        width: 1.5rem;
        height: 1.5rem;
        left: 0;
        box-shadow: 0 0 0 3px var(--glass-bg);
    }

    .timeline-dot i {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .tab-button {
        padding: 0.5rem 1rem;
        font-size: var(--text-xs);
        white-space: nowrap;
    }

    .glass-card {
        border-radius: 16px;
        padding: 1.5rem !important;
    }

    /* Horizontal Scroll for Filter Buttons */
    .flex.flex-wrap.mb-12.gap-2 {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 10px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .flex.flex-wrap.mb-12.gap-2::-webkit-scrollbar {
        display: none;
    }
}

/* Utility Classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
}

.stagger-item {
    opacity: 0;
    transform: translateY(20px);
}

.layered-section {
    position: relative;
    isolation: isolate;
}

.layer-1 {
    z-index: 1;
}

.layer-2 {
    z-index: 2;
    transform: translateY(-40px);
}

.layer-3 {
    z-index: 3;
    transform: translateY(-80px);
}

.text-secondary {
    color: var(--text-secondary);
}

/* Additional Styles for Part 4 */

/* Form Validation */
.form-input.border-red-500 {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Tooltip Styles */
.tooltip {
    transition: opacity 0.2s, transform 0.2s;
    transform-origin: left top;
}

.tooltip.hidden {
    opacity: 0;
    transform: scale(0.8);
}

/* Radial Progress Animation */
.radial-progress {
    --value: 0;
    --size: 6rem;
    --thickness: 8px;

    position: relative;
    width: var(--size);
    height: var(--size);
    border-radius: 50%;
    display: grid;
    place-items: center;
    background:
        radial-gradient(closest-side, var(--bg-start) 80%, transparent 81%),
        conic-gradient(currentColor calc(var(--value) * 1%), transparent 0);
    transition: --value 1s ease;
}

.radial-progress::before {
    content: attr(data-tooltip);
    position: absolute;
    opacity: 0;
    background: var(--bg-end);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    white-space: nowrap;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 10;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
}

.radial-progress:hover::before {
    opacity: 1;
}

/* Back to Top Button */
#backToTop {
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
}

#backToTop:hover {
    transform: translateY(-5px);
}

/* Social Icon Hover Effects */
.social-icon-link {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.social-icon-link:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .radial-progress {
        --size: 5rem;
        --thickness: 6px;
    }

    #contact .glass-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .radial-progress {
        --size: 4rem;
    }

    #backToTop {
        bottom: 1rem;
        right: 1rem;
        width: 3rem;
        height: 3rem;
    }
}