/* Base & Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --navy: #0F172A; /* Slate-900 for a more modern tech feel */
    --navy-light: #1E293B; /* Slate-800 */
    --accent: #00B4D8; /* Electric Blue */
    --accent-light: rgba(0, 180, 216, 0.1);
    --bg-main: #FFFFFF;
    --bg-light: #F8FAFC; /* Slate-50 */
    --text-main: #334155; /* Slate-700 */
    --text-heading: #0F172A; /* Slate-900 */
    --text-white: #F8FAFC;
    --border-color: #E2E8F0; /* Slate-200 */
    --glass-bg: rgba(255, 255, 255, 0.9);
    
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 3rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-heading);
    font-weight: 600;
    line-height: 1.3;
}

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

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

/* Utility Classes */
.bg-light { background-color: var(--bg-light); }
.bg-dark { background-color: var(--navy); color: var(--text-white); }
.opacity-50 { opacity: 0.5; }

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.section-heading {
    display: flex;
    align-items: center;
    margin-bottom: 4rem;
}

.section-num {
    font-family: var(--font-heading);
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 600;
    margin-right: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    white-space: normal;
}

.line {
    height: 1px;
    background-color: rgba(15, 23, 42, 0.15); /* More visible horizontal line */
    flex-grow: 1;
    margin-left: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent);
}

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

.btn-outline:hover {
    background-color: var(--navy);
    color: #fff;
}

/* 1. Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    height: 70px;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo a {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--navy);
}

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--navy);
    cursor: pointer;
}

.mobile-menu {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    transition: transform 0.4s ease;
    z-index: 999;
}

.mobile-menu.active {
    transform: translateY(0);
}

/* 3. Hero Section */
.hero-section {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
}

.hero-container {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    /* removed max-width to allow grid to control the width */
}

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-inner {
    position: relative;
    width: 100%;
    max-width: 400px;
    aspect-ratio: 4/5;
    border-radius: 8px;
    background-color: var(--navy);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-inner::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent);
    border-radius: 8px;
    z-index: -1;
    transition: var(--transition);
}

.hero-image-wrapper:hover .hero-image-inner::before {
    top: 10px;
    left: 10px;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 8px;
}

.greeting {
    font-family: var(--font-heading);
    color: var(--accent);
    font-weight: 600;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    letter-spacing: -1.5px;
    margin-bottom: 1.5rem;
    color: var(--text-heading);
}

.hero-subtitle {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
    min-height: 2.5rem;
}

.typing-cursor {
    display: inline-block;
    width: 2.5px;
    height: 1em;
    background-color: var(--accent);
    vertical-align: text-bottom;
    margin-left: 5px;
    animation: blink 0.8s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-desc {
    display: block;
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    max-width: 540px;
    margin-bottom: 2.5rem;
    font-weight: 500;
    color: var(--text-main);
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

/* Identity Statement */
.identity-section {
    padding: 5rem 0;
}

.identity-container {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    max-width: 900px;
}

.quote-icon {
    font-size: 3rem;
    color: var(--accent);
    opacity: 0.5;
}

.identity-text {
    font-size: 1.2rem;
    color: var(--text-white);
    font-weight: 300;
    line-height: 1.8;
}

/* Core Areas */
.card {
    background: var(--bg-main);
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.card h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

/* Custom List */
.custom-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin: 1.5rem 0;
}

.custom-list li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.custom-list li i {
    color: var(--accent);
}

.custom-list.light li {
    color: var(--border-color);
}

/* 4. About */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.about-block {
    margin-bottom: 3rem;
}

.about-block h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--navy);
    position: relative;
    display: inline-block;
}

.about-block h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

/* Digital Skills Subsection */
.digital-skills-wrapper {
    margin-top: 5rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(15, 23, 42, 0.1);
}

.sub-section-heading h3 {
    font-size: 1.5rem;
    color: var(--navy);
    position: relative;
    display: inline-block;
    margin-bottom: 1rem;
}

.sub-section-heading h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

.digital-skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin-top: 2rem;
}

.skill-category h4 {
    color: var(--navy);
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.skill-category h4 i {
    color: var(--accent);
}

.digital-skill-desc {
    color: var(--text-main);
    line-height: 1.7;
    font-size: 0.95rem;
    background: var(--bg-white);
    padding: 1.2rem;
    border-radius: 8px;
    border-left: 3px solid var(--accent);
    box-shadow: var(--shadow-sm);
    margin-top: 0.5rem;
}

/* 5. Expertise */
.section-intro {
    font-size: 1.1rem;
    max-width: 700px;
    margin-bottom: 3rem;
}

.expertise-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.expertise-header {
    background: var(--navy);
    color: var(--text-white);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.expertise-header h3 {
    color: var(--text-white);
    margin: 0;
    font-size: 1.2rem;
}

.expertise-header i {
    font-size: 1.5rem;
    color: var(--accent);
}

.expertise-body {
    padding: 2rem;
    flex-grow: 1;
}

.skill-list {
    margin-bottom: 2rem;
}

.skill-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
}

.skill-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.training-box {
    background: var(--bg-light);
    padding: 1.2rem;
    border-left: 4px solid var(--accent);
    border-radius: 0 4px 4px 0;
}

.training-box h4 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--navy);
}

.training-box p {
    font-size: 0.9rem;
    margin: 0;
}

.expertise-footer {
    padding: 1.5rem 2rem;
    background: var(--accent-light);
    border-top: 1px solid var(--border-color);
}

.expertise-footer p {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--navy);
}

.positioning-statement {
    margin-top: 4rem;
    padding: 2rem;
    background: var(--navy);
    border-radius: 8px;
    text-align: center;
}

.positioning-statement p {
    color: var(--text-white);
    font-size: 1.1rem;
    margin: 0;
    font-family: var(--font-heading);
    font-weight: 500;
}

/* 6. Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--accent);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.3s ease;
}

.project-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.project-card:hover::before {
    transform: scaleY(1);
}

.project-title {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: var(--navy);
    position: relative;
    display: inline-block;
}

.project-title::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

.project-details p {
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
}

.project-details strong {
    color: var(--navy);
}

/* 6.2 Ventures */
.ventures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.venture-card {
    background-color: var(--bg-white);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.venture-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.venture-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--navy);
    position: relative;
    display: inline-block;
}

.venture-card h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

.venture-card p {
    flex-grow: 1;
    font-size: 1rem;
    color: var(--text-main);
}

.venture-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--accent);
    margin-top: 1.5rem;
}

.venture-link:hover {
    gap: 0.8rem;
}

.venture-card.upcoming {
    opacity: 0.9;
}

.badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--navy);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
}

/* 7. Research */
.research-block {
    background: var(--navy-light);
    padding: 2.5rem;
    border-radius: 8px;
    color: var(--border-color);
}

.research-block h3 {
    color: var(--text-white);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    position: relative;
    display: inline-block;
}

.research-block h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

.research-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

/* 8. Experience Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15px;
    height: 100%;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    left: 0;
    top: 5px;
    width: 32px;
    height: 32px;
    background: var(--bg-main);
    border: 2px solid var(--accent);
    border-radius: 50%;
    z-index: 1;
}

.timeline-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
}

.timeline-content {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.timeline-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
    padding-bottom: 8px; /* space for underline */
}

.timeline-content h3::after {
    content: '';
    position: absolute;
    bottom: 0px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

/* 9. Contact */
.contact-section {
    background: var(--navy);
    padding: 6rem 0 2rem;
    color: var(--text-white);
    text-align: center;
}

.contact-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    color: var(--text-white);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-desc {
    color: var(--border-color);
    margin-bottom: 3rem;
    line-height: 1.6;
}

.contact-methods.circle-style {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

/* Minimal Contact Form */
.minimal-contact-form {
    background: rgba(255, 255, 255, 0.03);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.minimal-contact-form input,
.minimal-contact-form textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    color: var(--text-white);
    padding: 0.8rem 0;
    font-size: 1rem;
    transition: var(--transition);
    font-family: var(--font-main);
}

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

.minimal-contact-form input::placeholder,
.minimal-contact-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-submit {
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin-top: 1rem;
}

.circle-style .contact-card {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--navy-light);
    border-radius: 50%;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--accent);
}

.circle-style .contact-card i {
    font-size: 1.5rem;
}

.circle-style .contact-card:hover {
    background: var(--accent);
    transform: translateY(-5px);
    color: var(--bg-main);
}

.circle-style .contact-card:hover i {
    color: var(--bg-main);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
}

.footer-bottom p {
    color: var(--border-color);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .container { padding: 0 2rem; }
}

@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    
    /* Force 2 columns and center last item */
    .grid-2, .grid-3, .projects-grid, .ventures-grid, .digital-skills-grid {
        display: flex !important;
        flex-wrap: wrap !important;
        justify-content: center !important;
        gap: 1rem !important;
    }

    .card, .project-card, .venture-card, .skill-category, .research-block {
        width: calc(50% - 0.5rem) !important;
        min-width: unset !important;
        padding: 1.5rem !important;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-content {
        margin: 0 auto;
    }
    
    .hero-image-wrapper {
        order: -1;
    }
    
    .hero-cta {
        justify-content: center;
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }

    .identity-container {
        flex-direction: column;
    }

    .contact-methods.circle-style {
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 13px;
    }
    
    .card, .project-card, .venture-card, .skill-category, .research-block {
        width: calc(50% - 0.5rem) !important; /* Still keep 2 per row as requested */
        padding: 1.2rem 1rem !important;
    }
    
    .section-heading {
        margin-bottom: 2.5rem;
    }
}