* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #000;
    --secondary-color: #666;
    --accent-color: #007aff;
    --background-color: #fff;
    --surface-color: #f8f9fa;
    --border-color: #e1e5e9;
    --text-primary: #000;
    --text-secondary: #666;
    --font-primary: 'Cal Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Space Mono', monospace;
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary-color: #fff;
    --secondary-color: #b3b3b3;
    --accent-color: #0a84ff;
    --background-color: #1a1a1a;
    --surface-color: #2a2a2a;
    --border-color: #404040;
    --text-primary: #fff;
    --text-secondary: #b3b3b3;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    overflow-x: hidden;
}

/* Custom Cursor */
.cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: difference;
    transition: transform 0.1s ease;
    opacity: 0;
}

@media (hover: hover) {
    .cursor {
        opacity: 1;
    }
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

[data-theme="dark"] .nav {
    background: rgba(26, 26, 26, 0.95);
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 400;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    width: 60px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    border-color: var(--accent-color);
    transform: scale(1.05);
}

.sun-icon,
.moon-icon {
    position: absolute;
    transition: var(--transition);
    font-size: 1rem;
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.moon-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0.5);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0.5);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-greeting {
    display: block;
    font-size: 0.6em;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.hero-name {
    display: block;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 1s ease forwards;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 500px;
    animation: fadeInUp 1s ease 0.2s forwards;
    opacity: 0;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1s ease 0.4s forwards;
    opacity: 0;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background: transparent;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

[data-theme="dark"] .btn-primary {
    background: var(--accent-color);
    color: white;
    border: 2px solid var(--accent-color);
}

[data-theme="dark"] .btn-primary:hover {
    background: transparent;
    color: var(--accent-color);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

[data-theme="dark"] .btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
}

[data-theme="dark"] .btn-secondary:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
    position: relative;
}

.floating-elements {
    position: relative;
    width: 300px;
    height: 300px;
}

.element {
    position: absolute;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.element-1 {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-color), #00c896);
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.element-2 {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #ff6b6b, #ffa726);
    top: 50%;
    right: 20%;
    animation-delay: 2s;
}

.element-3 {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #9c27b0, #e91e63);
    bottom: 20%;
    left: 40%;
    animation-delay: 4s;
}

.element-4 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #00c896, #007aff);
    top: 10%;
    right: 10%;
    animation-delay: 1s;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.scroll-line {
    width: 2px;
    height: 40px;
    background: var(--text-secondary);
    margin: 0.5rem auto;
    animation: scrollPulse 2s ease-in-out infinite;
}

/* Section Styles */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    background: var(--surface-color);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-category li:hover {
    color: var(--primary-color);
    padding-left: 1rem;
}

.membership {
    background: var(--background-color);
}

.membership-plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2.5rem;
    align-items: stretch;
}

/* Plan cards */
.plan-card {
    position: relative;
    background: var(--surface-color);
    border-radius: 16px;
    padding: 2.25rem 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: var(--transition);
}

.plan-card .plan-header h3 {
    font-size: 1.5rem;
    margin-bottom: 0.35rem;
}

.plan-tagline {
    font-size: 0.98rem;
    color: var(--text-secondary);
}

.plan-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.plan-level {
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    display: inline-block;
    background: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .plan-level {
    background: rgba(255, 255, 255, 0.03);
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.6rem;
}

.plan-features li {
    font-size: 0.98rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.25rem;
}

.plan-features li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-color);
}

.plan-cta {
    margin-top: auto;
}

.plan-card.featured {
    border: 1px solid var(--accent-color);
    transform: translateY(-6px);
}

.plan-card.featured .plan-header h3 {
    color: var(--accent-color);
}

.plan-badge {
    position: absolute;
    top: -0.9rem;
    right: 1.75rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent-color), #00c896);
    color: #fff;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Membership responsive tweaks */
@media (max-width: 768px) {
    .membership-plans {
        grid-template-columns: 1fr;
        gap: 1.75rem;
    }

    .plan-card {
        padding: 1.75rem 1.5rem;
    }

    .plan-card.featured {
        transform: translateY(0);
    }
}

@media (min-width: 1024px) {
    .membership-plans {
        gap: 3rem;
    }

    .plan-card.featured {
        transform: translateY(-10px);
    }
}

/* Work Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--surface-color), #e3f2fd);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-placeholder {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.project-info p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tags span {
    padding: 0.25rem 0.75rem;
    background: var(--surface-color);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Contact Section */
.contact {
    background: var(--surface-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-text h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: white;
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.contact-link:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow);
}

.contact-link span:first-child {
    font-weight: 500;
}

.contact-link span:last-child {
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* Form */
.contact-form {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.contact-form select {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background: white;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
}

.contact-form select:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Footer */
.footer {
    background: #000;
    color: #fff;
    text-align: center;
    padding: 2rem 0;
}

/* Ensure footer stays readable in dark mode */
[data-theme="dark"] .footer {
    background: #000;
    color: #fff;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

@keyframes scrollPulse {
    0%, 100% {
        opacity: 0.4;
        transform: scaleY(1);
    }
    50% {
        opacity: 1;
        transform: scaleY(1.5);
    }
}

/* removed modal styles to modal.css {} */

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: white;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 3rem;
        transition: var(--transition);
        z-index: 999;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .hero-visual {
        order: -1;
        height: 250px;
    }

    .floating-elements {
        width: 200px;
        height: 200px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .skills {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-link {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .cursor {
        display: none;
    }

    .nav-controls {
        gap: 0.5rem;
    }

    .theme-toggle {
        width: 50px;
        height: 28px;
        padding: 0.25rem 0.5rem;
    }

    .sun-icon,
    .moon-icon {
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .nav {
        padding: 1rem;
    }

    section {
        padding: 4rem 0;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .service-icon,
    .resource-icon {
        font-size: 2.5rem;
    }

    .plan-card {
        padding: 2rem 1.5rem;
    }

    .webinar-cta h3 {
        font-size: 1.5rem;
    }
}

/* Mobile phones (≤768px) */
@media (max-width: 768px) {
    .nav {
        padding: 0.75rem;
    }

    .hero {
        padding-top: 72px;
    }

    .hero-text h1 {
        font-size: 2.1rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .hero-visual {
        height: 200px;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .section-header p {
        font-size: 1rem;
    }

    .contact-form {
        padding: 1.25rem;
    }

    .scroll-indicator {
        display: none;
    }
}

/* Tablets (portrait & landscape, ~7"–12") */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }

    .hero-content {
        grid-template-columns: 1.2fr 1fr;
        gap: 3rem;
    }

    .hero-text h1 {
        font-size: 3rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .contact-content {
        grid-template-columns: 1.1fr 1fr;
        gap: 3rem;
    }

    .membership-plans {
        gap: 2.5rem;
    }
}

/* Large desktop & TVs (≥1440px) */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }

    .hero-text h1 {
        font-size: 4.25rem;
    }

    .hero-description {
        font-size: 1.35rem;
        max-width: 640px;
    }

    .section-header h2 {
        font-size: 2.75rem;
    }

    .section-header p {
        font-size: 1.2rem;
    }

    .contact-text h2 {
        font-size: 2.25rem;
    }
}

/* Ultra-large screens & TVs (≥1920px) */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
    }

    .hero {
        padding-top: 100px;
    }

    .hero-content {
        gap: 5rem;
    }

    .hero-text h1 {
        font-size: 4.5rem;
    }

    section {
        padding: 7rem 0;
    }

    .membership-plans {
        gap: 4rem;
    }

    .contact-content {
        gap: 5rem;
    }
}

/* Accordion styles */
.accordion-header {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.accordion-header-text {
    flex: 1;
}

.accordion-header::after {
    content: '−';
    font-size: 1.25rem;
    line-height: 1;
    margin-left: 0.5rem;
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0.8;
}

.accordion-header.is-collapsed::after {
    content: '+';
    transform: rotate(0deg);
}

.accordion-body {
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 1;
}

.accordion-body.collapsed {
    max-height: 0 !important;
    opacity: 0;
}

/* Mobile glass cards for key sections */
@media (max-width: 768px) {
    /* Space around each glass box */
    .achievements,
    .hobbies,
    .services,
    .webinar,
    .resources {
        margin: 1.5rem 0;
    }

    /* Glass container for each requested section */
    .achievements,
    .hobbies,
    .services .container,
    .webinar .container,
    .resources .container {
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
        border-radius: 16px;
        border: 1px solid rgba(255, 255, 255, 0.35);
        box-shadow: 0 18px 35px rgba(0, 0, 0, 0.25);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        padding: 1.5rem 1.25rem;
        position: relative;
        overflow: hidden;
    }

    /* Reflection highlight */
    .achievements::before,
    .hobbies::before,
    .services .container::before,
    .webinar .container::before,
    .resources .container::before {
        content: '';
        position: absolute;
        top: -40%;
        left: -30%;
        width: 60%;
        height: 140%;
        background: linear-gradient(120deg, rgba(255, 255, 255, 0.45), transparent);
        opacity: 0.7;
        transform: skewX(-20deg);
        pointer-events: none;
    }

    /* Keep inner content clear of edges */
    .achievements h3,
    .hobbies h3,
    .services .section-header,
    .webinar .section-header,
    .resources .section-header {
        position: relative;
        z-index: 1;
    }

    .expertise-grid,
    .hobbies-grid,
    .services-grid,
    .webinar-content,
    .resources-grid {
        position: relative;
        z-index: 1;
    }
}

/* Unified box sizing on mobile (~6.3" default) */
@media (max-width: 768px) {
    .service-card,
    .resource-card,
    .plan-card,
    .topic-card,
    .achievement-item,
    .hobby-item,
    .expertise-card,
    .contact-link,
    .contact-form,
    .plan-card .plan-cta .btn-primary,
    .plan-card .plan-cta .btn-secondary {
        width: 100%;
        max-width: 420px;
        margin-left: auto;
        margin-right: auto;
    }

    /* Ensure membership cards stack uniformly */
    .membership-plans {
        grid-template-columns: 1fr;
        align-items: stretch;
    }
}