/* style.css
    This file contains all the styles for the portfolio.
    Moving CSS to an external file improves performance by allowing the browser to cache it.
*/

:root {
    /* Dark Mode ("Electric Night") */
    --primary-color: #00E5FF; /* Electric Cyan */
    --secondary-color: #9C27B0; /* Vibrant Purple */
    --accent-color: linear-gradient(45deg, #00E5FF, #9C27B0);
    --text-color: #E2E8F0; /* Cool Gray */
    --text-muted: #A0AEC0; /* Lighter Cool Gray */
    --bg-color: #0A0A1A; /* Near Black */
    --bg-sidebar: rgba(18, 18, 30, 0.8);
    --bg-card: rgba(22, 22, 40, 0.85);
    --border-color: rgba(0, 229, 255, 0.2); /* Faint Cyan Border */
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --sidebar-width: 280px;
    --error-color: #ef4444; /* Red 500 */
    --peel-size: 0px; /* New variable for page peel effect */
}

[data-theme="light"] {
    /* Light Mode ("Fresh & Vibrant") */
    --primary-color: #00BFFF; /* DeepSkyBlue */
    --secondary-color: #20C997; /* Teal */
    --accent-color: linear-gradient(45deg, #00BFFF, #20C997);
    --text-color: #1a202c; /* Dark Slate Gray */
    --text-muted: #4a5568; /* Lighter Slate Gray */
    --text-hover: #000000; /* Pure Black */
    --bg-color: #F7FAFC; /* Very Light Gray */
    --bg-sidebar: rgba(255, 255, 255, 0.85);
    --bg-card: rgba(255, 255, 255, 0.9);
    --border-color: rgba(0, 0, 0, 0.08); /* Soft Black Border */
    --box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.1);
    --error-color: #dc2626; /* Red 600 */
}

[data-theme="light"] .skill-category h3 {
    color: var(--text-color);
}
[data-theme="light"] .contact-info {
    background-color: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.05);
}
[data-theme="light"] .social-link {
    background-color: rgba(0, 0, 0, 0.03);
}
[data-theme="light"] .social-link:hover {
    color: #fff;
}
[data-theme="light"] .theme-toggle {
    background-color: rgba(0, 0, 0, 0.03);
}
[data-theme="light"] .theme-toggle:hover {
    color: #fff;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition), color var(--transition);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

/* Desktop background images */
body::before, body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    transition: opacity 0.8s ease-in-out;
    z-index: -1;
}

body::before {
    background-image: linear-gradient(rgba(247, 250, 252, 0.3), rgba(247, 250, 252, 0.3)), url('sun.webp');
    opacity: var(--sun-opacity, 1);
}

body::after {
    background-image: linear-gradient(rgba(10, 10, 26, 0.5), rgba(10, 10, 26, 0.5)), url('moon.webp');
    opacity: var(--moon-opacity, 0);
}


img {
    max-width: 100%;
    height: auto;
    display: block;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}
a:focus-visible, button:focus-visible, [tabindex]:not([tabindex="-1"]):focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 3px solid var(--secondary-color);
    outline-offset: 3px;
    border-radius: 4px;
    transition: outline 0.2s ease;
}
.form-control:focus-visible {
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.3);
}

.container {
    display: flex;
    position: relative;
    z-index: 1;
    flex-grow: 1;
}

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    background-color: transparent;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-right: none;
    padding: 2rem 1.5rem;
    overflow-y: auto;
    z-index: 10;
    transform: translateX(calc(-100% + 40px));
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), background-color 0.4s ease;
}

.sidebar:hover {
    transform: translateX(0);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
}

.sidebar > *:not(.sidebar-indicator) {
    transition: opacity 0.3s ease;
    opacity: 0;
}

.sidebar:hover > * {
    opacity: 1;
}

.sidebar-indicator {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    opacity: 1;
    transition: opacity 0.3s ease, right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.3s ease;
    z-index: 11;
    animation: subtle-slide 2s infinite ease-in-out;
}

.sidebar-indicator.interactive-hover {
    transform: translateY(-50%) scale(1.2);
}

.sidebar-indicator::before {
    content: '';
    border: solid var(--primary-color);
    border-width: 0 4px 4px 0;
    display: inline-block;
    padding: 8px;
    transform: rotate(-45deg);
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.sidebar:hover .sidebar-indicator {
    opacity: 0;
}

@keyframes subtle-slide {
    0%, 100% {
        transform: translateY(-50%) translateX(0);
    }
    50% {
        transform: translateY(-50%) translateX(4px);
    }
}

.content {
    margin-left: 40px;
    width: calc(100% - 40px);
    padding: 3rem 2rem;
    transition: margin-left 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    height: 100vh;
    overflow-y: auto;
}

.sidebar:hover ~ .content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-color);
    transition: var(--transition);
    text-decoration: none;
    cursor: pointer;
    border: none;
    overflow: hidden;
    position: relative;
    margin-bottom: 1rem;
}
.theme-toggle i {
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.3s ease;
}
.theme-toggle.rotating i {
    transform: rotate(360deg) scale(0);
    opacity: 0;
}

.theme-toggle:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.profile-pic {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
    flex-shrink: 0;
}

.logo {
    background: var(--accent-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 1.5rem;
    white-space: nowrap;
    font-weight: 700;
    margin: 0;
    position: relative;
    line-height: 1.2;
    flex-grow: 1;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.logo:hover::after {
    width: 100%;
}
.contact-info {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    animation: fadeSlideUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transition: background-color var(--transition);
}
.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}
.contact-item:last-child {
    margin-bottom: 0;
}
.contact-item i {
    width: 1.25rem;
    color: var(--text-muted);
    margin-right: 0.75rem;
    transition: var(--transition);
}
.contact-item:hover i {
    color: var(--text-hover);
    transform: scale(1.1);
}
.contact-item a,
.contact-item span {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
    word-break: break-word;
    overflow-wrap: break-word;
    flex: 1;
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.social-links {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}
.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-color);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), background-color 0.3s ease;
    text-decoration: none;
    position: relative;
}

.social-link i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease-in-out;
}
.social-link .icon-dark {
    opacity: 1;
    color: #E2E8F0;
}
.social-link .icon-light {
    opacity: 0;
    color: #4a5568;
}
[data-theme="light"] .social-link .icon-dark {
    opacity: 0;
}
[data-theme="light"] .social-link .icon-light {
    opacity: 1;
}

.social-link:hover {
    background: var(--accent-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}
.social-link:hover i {
    color: #fff !important;
}

[data-theme="light"] .social-link:hover {
    color: var(--text-hover);
}

.nav-list {
    list-style: none;
}
.nav-item {
    margin-bottom: 0.5rem;
}
.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.nav-link i {
    margin-right: 0.75rem;
    width: 1rem;
    text-align: center;
}
.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}
[data-theme="light"] .nav-link:hover {
    color: var(--text-hover);
    background: rgba(0, 0, 0, 0.05);
}
.nav-link:hover i {
    transform: translateX(3px);
}
[data-theme="light"] .nav-link:hover i {
    color: var(--text-hover);
}
.nav-link.active {
    background: var(--accent-color);
    color: #fff;
    font-weight: 500;
}
[data-theme="light"] .nav-link.active {
    color: var(--text-hover);
}
.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}
.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.section {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeIn 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}
.section-header {
    font-size: clamp(1.75rem, 5vw, 2.25rem);
    background: var(--accent-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    display: inline-block;
    position: relative;
}
.section-header::before {
    content: '';
    position: absolute;
    width: 30px;
    height: 2px;
    background: var(--accent-color);
    bottom: -2px;
    left: 0;
    transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.section-header:hover::before {
    width: 100%;
}
.content-box {
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--box-shadow);
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.content-box:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 20px -10px rgba(0, 0, 0, 0.6);
}

.interactive-card .interactive-card-heading {
    font-size: clamp(1.25rem, 4vw, 1.5rem);
    font-weight: 600;
    color: var(--text-color);
}

.summary-subtitle {
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: clamp(1rem, 2.5vw, 1.1rem);
}
.summary-description {
    font-size: clamp(0.95rem, 2.5vw, 1.1rem);
    line-height: 1.7;
    min-height: 150px; /* Prevents layout shift */
    max-width: 75ch; /* Improves readability */
}

.skills-intro {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1rem;
}

.skill-category-foldable {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.skill-category-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem 0;
}

.category-chevron {
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.5rem;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), margin-top 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    margin-top: 0;
}

/* Accessibility: Expand on focus-within for keyboard users */
.skill-category-foldable.expanded .skills-grid,
.skill-category-foldable:hover .skills-grid,
.skill-category-foldable:focus-within .skills-grid {
    max-height: 600px;
    opacity: 1;
    margin-top: 1.5rem;
}

.skill-category-foldable.expanded .category-chevron,
.skill-category-foldable:hover .category-chevron,
.skill-category-foldable:focus-within .category-chevron {
    transform: rotate(180deg);
}

.skill-card {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    min-height: 200px;
    transform-style: preserve-3d;
}
.skill-card:hover, .skill-card:focus {
    box-shadow: 0 12px 24px rgba(0,0,0,0.2);
}
.skill-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: var(--accent-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    animation: bounce-in 0.6s cubic-bezier(0.68, -0.55, 0.27, 1.55) both;
    animation-play-state: paused;
}
.skill-card.visible .skill-icon {
    animation-play-state: running;
}
@keyframes bounce-in {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.skill-card:hover .skill-icon, .skill-card:focus .skill-icon {
    transform: scale(1.1) translateZ(20px);
}
.skill-name {
    font-weight: 500;
    font-size: 1rem;
    color: var(--text-color);
}
.skill-details {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(to top, var(--primary-color) 0%, rgba(30, 65, 175, 0) 100%);
    color: #fff;
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 100%;
}
.skill-card:hover .skill-details, .skill-card:focus .skill-details {
    transform: translateY(0);
}

.page-peel-timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.page-peel-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: transform 0.4s ease;
}

.page-peel-card::before {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: var(--peel-size); /* Controlled by JS */
    height: var(--peel-size); /* Controlled by JS */
    background: linear-gradient(135deg, transparent 50%, var(--bg-color) 50.1%);
    box-shadow: -5px -5px 10px rgba(0,0,0,0.2);
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 2;
}

.page-peel-card:hover {
    transform: scale(1.02);
}

.card-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.page-peel-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.page-peel-card .company {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.page-peel-card .details {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.5s 0.1s cubic-bezier(0.25, 0.46, 0.45, 0.94), margin-top 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.page-peel-card.expanded .details,
.page-peel-card:hover .details,
.page-peel-card:focus-within .details {
    max-height: 500px;
    opacity: 1;
    margin-top: 1rem;
}

.details h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    background: var(--accent-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.details ul {
    list-style: none;
    padding-left: 0;
}

.details li {
    padding-left: 1.2rem;
    position: relative;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.details li.visible {
    opacity: 1;
    transform: translateX(0);
}

.details li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

@keyframes animated-border {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.interactive-card {
    --border-size: 2px;
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1;
}

.interactive-card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        from var(--angle),
        transparent 0%,
        var(--secondary-color) 10%,
        transparent 25%,
        var(--primary-color) 35%,
        transparent 50%,
        var(--secondary-color) 60%,
        transparent 75%,
        var(--primary-color) 85%,
        transparent 100%
    );
    transform: translate(-50%, -50%) rotate(0deg);
    transition: opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    animation: animated-border 8s linear infinite;
    opacity: 0;
    z-index: -2;
}

.interactive-card:hover::before {
    opacity: 1;
}

.interactive-card::after {
    content: '';
    position: absolute;
    inset: var(--border-size);
    background: var(--bg-card);
    border-radius: calc(12px - var(--border-size));
    z-index: -1;
}

.interactive-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .interactive-card .interactive-card-heading {
    color: var(--text-color);
}

.card-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.card-description {
    font-size: 0.95rem;
    color: var(--text-muted);
    flex-grow: 1;
}

.card-footer {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--accent-color);
    border-radius: 8px;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card-link:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.card-link:hover::before {
    left: 100%;
}

.contact-form {
    margin-top: 1.5rem;
}
.form-group {
    margin-bottom: 1.25rem;
    position: relative;
}
.form-group::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 100%;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0) translateX(-50%);
    transform-origin: center;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.form-group:focus-within::after {
    transform: scaleX(1) translateX(-50%);
}
.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), color 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.form-control:focus + .form-label,
.form-control:not(:placeholder-shown) + .form-label {
    transform: translateY(-5px);
    background: var(--accent-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.form-control {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
}
.form-control.invalid {
    border-color: var(--error-color);
}
.form-group.invalid .form-label {
    color: var(--error-color);
}
textarea.form-control {
    resize: vertical;
    min-height: 120px;
}
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
}
.btn:hover::before {
    left: 100%;
}
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.error-message {
    color: var(--error-color);
    font-size: 0.85rem;
    margin-top: 0.25rem;
    display: none;
    min-height: 1.2em; /* Reserve space to prevent layout shift */
}
.form-group.invalid .error-message {
    display: block;
}
.thank-you-message {
    text-align: center;
    padding: 2rem;
}
.thank-you-message h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: var(--accent-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.thank-you-message p {
    margin-bottom: 1.5rem;
    font-size: 1rem;
}
.lazy-load {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.lazy-load.visible {
    opacity: 1;
    transform: translateY(0);
}

.mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.mobile-header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-header .social-links {
    margin-bottom: 0;
}

.mobile-header .theme-toggle {
    margin-bottom: 0;
}

.mobile-contact-info {
    display: none;
}

.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-sidebar);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.bottom-nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 0.25rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.7rem;
    text-align: center;
    transition: color 0.3s ease, transform 0.3s ease;
    flex-grow: 1;
}

.bottom-nav-link i {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.bottom-nav-link span {
    white-space: nowrap;
}

.bottom-nav-link.active {
    color: var(--primary-color);
    transform: translateY(-3px);
}

[data-theme="light"] .bottom-nav-link.active {
     color: var(--secondary-color);
}
.footer {
    background-color: transparent;
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-muted);
    margin-top: auto;
}

/* Personalized Welcome Toast */
.welcome-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translate(-50%, 200%);
    background: var(--accent-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    z-index: 2000;
    font-weight: 500;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    opacity: 0;
}

.welcome-toast.show {
    transform: translate(-50%, 0);
    opacity: 1;
}

@keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@media (max-width: 992px) {
     .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }
    .skill-card {
        min-height: 180px;
    }
}

@media (max-width: 768px) {
    /* Hide the desktop background pseudo-elements */
    body::before, body::after {
        display: none;
    }

    /* --- PREMIUM DARK THEME (MOBILE) --- */
    [data-theme="dark"] body {
        background-color: #02040a; /* Premium Midnight Blue */
        background-image:
            radial-gradient(circle at 15% 20%, hsla(190, 80%, 50%, 0.1), transparent 40%),
            radial-gradient(circle at 85% 70%, hsla(280, 50%, 50%, 0.1), transparent 40%);
        background-attachment: fixed;
    }

    /* Matched Glass UI for dark theme elements */
    [data-theme="dark"] .mobile-header,
    [data-theme="dark"] .mobile-contact-info,
    [data-theme="dark"] .content-box,
    [data-theme="dark"] .bottom-nav {
        background-color: rgba(22, 27, 34, 0.6);
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 16px;
        box-shadow: inset 0 0 1px 1px rgba(255, 255, 255, 0.05);
    }
    
    /* Clean, professional interactions */
    [data-theme="dark"] .mobile-header .social-link:hover,
    [data-theme="dark"] .mobile-header .theme-toggle:hover {
        background-color: rgba(255, 255, 255, 0.1);
        transform: scale(1.1);
        box-shadow: none;
    }
    
    /* Elegant active state for Bottom Nav */
    .bottom-nav-link.active {
        color: var(--primary-color);
        transform: translateY(-3px);
        text-shadow: none;
    }
    .bottom-nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 5px;
        width: 5px;
        height: 5px;
        background-color: var(--primary-color);
        border-radius: 50%;
    }

    /* --- LIGHT THEME STYLES (Unchanged) --- */
    [data-theme="light"] body {
        background-color: #eef2f9;
        background-image:
            radial-gradient(circle at 100% 0%, hsla(180, 70%, 80%, 0.5), transparent 40%),
            radial-gradient(circle at 0% 100%, hsla(200, 80%, 80%, 0.5), transparent 40%);
        animation: none;
    }

    [data-theme="light"] .mobile-header,
    [data-theme="light"] .mobile-contact-info,
    [data-theme="light"] .content-box,
    [data-theme="light"] .bottom-nav {
        background-color: rgba(255, 255, 255, 0.6);
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(0, 0, 0, 0.08);
        border-radius: 16px;
        box-shadow: inset 0 0 1px 1px rgba(255, 255, 255, 0.2);
    }
    
    /* --- GENERAL MOBILE LAYOUT (Unchanged) --- */
    .mobile-header .social-link, .mobile-header .theme-toggle {
        border-radius: 50%;
    }
    .sidebar {
        display: none;
    }
    .content {
        margin-left: 0;
        width: 100%;
        padding: 1rem 1rem 90px 1rem;
        height: auto; /* Revert for mobile to allow natural scroll */
        overflow-y: visible;
    }
    .bottom-nav {
        display: flex;
        justify-content: space-around;
    }
    .section-header, .interactive-card .interactive-card-heading {
        font-size: 1.75rem;
    }
    .summary-description {
        font-size: 1rem;
    }
    .content-box {
        padding: 1.25rem;
    }
    .card-grid {
        grid-template-columns: 1fr;
    }
    .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 1rem;
    }
    .skill-card {
        padding: 1rem 0.5rem;
        min-height: 140px;
    }
    .skill-icon {
        font-size: 2.8rem;
    }
    .skill-name {
        font-size: 0.9rem;
    }
    .footer {
        padding-bottom: 80px;
    }
    .mobile-header {
        display: flex;
        padding: 1rem;
        margin-bottom: 1rem;
    }
    .mobile-header .profile-header {
        margin-bottom: 0;
        flex-grow: 1;
    }
    .mobile-header .logo {
        display: none;
    }
    .mobile-header .social-links {
        justify-content: flex-end;
        margin-bottom: 0;
        gap: 0.75rem;
    }
    .mobile-header-actions {
        gap: 0.75rem;
    }
    .mobile-contact-info {
        display: block;
        padding: 1rem;
    }
}
::-webkit-scrollbar {
    display: none;
}
body {
    scrollbar-width: none;
    -ms-overflow-style: none;
}