/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    --bg-primary: #0a0f1c;
    --bg-secondary: #111827;
    --bg-card: #1a2234;
    --bg-card-hover: #1f2a40;
    --text-primary: #f0f4f8;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --border: #1e293b;
    --border-light: #2d3a4f;
    --tag-pm: #10b981;
    --tag-bd: #f59e0b;
    --tag-investment: #8b5cf6;
    --tag-strategy: #ef4444;
    --radius: 10px;
    --radius-lg: 16px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--accent-hover);
}

/* ===========================
   Layout
   =========================== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin-top: 10px;
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

/* ===========================
   Navigation
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 28, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-logo:hover {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

.nav-resume-btn {
    background: var(--accent);
    color: white !important;
    padding: 8px 18px;
    border-radius: 6px;
    font-weight: 600;
}

.nav-resume-btn:hover {
    background: var(--accent-hover);
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        var(--bg-primary);
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 8px;
}

.hero-name {
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: -1.5px;
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero-title {
    font-size: 1.4rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.5;
    margin-bottom: 8px;
    min-height: 2.1rem;
    transition: opacity 0.2s ease;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 48px;
}

/* ===========================
   Role Filter
   =========================== */
.role-filter {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    max-width: 700px;
}

.filter-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.filter-label-second {
    margin-top: 20px;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: var(--accent-glow);
}

.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

/* ===========================
   About Section
   =========================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    align-items: start;
    margin-top: 32px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.highlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 20px 24px;
    text-align: center;
}

.highlight-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

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

/* ===========================
   Education Cards
   =========================== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 24px 28px;
}

.education-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.education-degree {
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.education-detail {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.6;
}

@media (max-width: 640px) {
    .education-grid {
        grid-template-columns: 1fr;
    }
}

/* ===========================
   Timeline / Experience
   =========================== */
.timeline {
    margin-top: 40px;
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-light);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    transition: opacity var(--transition), transform var(--transition);
}

.timeline-item.filtered-out {
    opacity: 0.1;
    transform: scale(0.97);
}

.timeline-marker {
    position: absolute;
    left: -32px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-secondary);
    z-index: 1;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 28px;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 4px;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

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

.timeline-content h4 {
    color: var(--accent);
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-pm { background: rgba(16, 185, 129, 0.15); color: var(--tag-pm); }
.tag-bd { background: rgba(245, 158, 11, 0.15); color: var(--tag-bd); }
.tag-investment { background: rgba(139, 92, 246, 0.15); color: var(--tag-investment); }
.tag-strategy { background: rgba(239, 68, 68, 0.15); color: var(--tag-strategy); }
.tag-partnership { background: rgba(249, 115, 22, 0.15); color: #f97316; }
.tag-sales { background: rgba(249, 115, 22, 0.15); color: #f97316; }

/* Industry tags */
.industry-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

.ind-climate { }
.ind-energy { }
.ind-tech { }
.ind-telecom { }
.ind-finance { }
.ind-consumer { }
.ind-datacenter { }
.ind-ai { }
.ind-infrastructure { }
.ind-supplychain { }

.timeline-bullets {
    list-style: none;
    padding: 0;
}

.timeline-bullets li {
    color: var(--text-secondary);
    padding: 6px 0 6px 20px;
    position: relative;
    font-size: 0.95rem;
    transition: opacity var(--transition);
}

.timeline-bullets li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.timeline-bullets li.filtered-out {
    opacity: 0.15;
    height: 0;
    padding: 0;
    overflow: hidden;
}

/* ===========================
   Projects Grid
   =========================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition);
}

.project-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.project-card.filtered-out {
    opacity: 0.1;
    transform: scale(0.97);
}

.project-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.project-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.project-result {
    background: var(--accent-glow);
    border-left: 3px solid var(--accent);
    padding: 10px 14px;
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 500;
    border-radius: 0 6px 6px 0;
    margin-bottom: 16px;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* ===========================
   Skills Grid
   =========================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 28px;
    transition: all var(--transition);
}

.skill-category.filtered-out {
    opacity: 0.1;
    transform: scale(0.97);
}

.skill-category:hover {
    background: var(--bg-card-hover);
}

.skill-category h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--accent);
}

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

.skill-category li {
    color: var(--text-secondary);
    padding: 5px 0;
    font-size: 0.9rem;
    position: relative;
    padding-left: 16px;
}

.skill-category li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

/* ===========================
   Insights Section
   =========================== */
.insights-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.insight-filter-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
}

.insight-filter-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.insight-filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.insight-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 28px;
    transition: all var(--transition);
}

.insight-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.insight-card.filtered-out {
    opacity: 0.1;
    transform: scale(0.97);
}

.insight-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.insight-card h3 {
    font-size: 1.05rem;
    margin: 8px 0 12px;
    line-height: 1.4;
}

.insight-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.insight-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.insight-tag {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.insight-link {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===========================
   Testimonials
   =========================== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 28px;
}

.testimonial-quote {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-style: italic;
    margin-bottom: 20px;
    line-height: 1.7;
}

.testimonial-author strong {
    display: block;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.testimonial-author span {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===========================
   Contact Section
   =========================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
    justify-content: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 2px;
}

.contact-item a,
.contact-item span {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-form input,
.contact-form textarea {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 14px 18px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition);
    outline: none;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-muted);
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    background: var(--accent);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
    font-family: inherit;
}

.btn-submit:hover {
    background: var(--accent-hover);
}

/* ===========================
   Footer
   =========================== */
.footer {
    text-align: center;
    padding: 32px 0;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 900px) {
    .hero-name {
        font-size: 2.8rem;
    }

    .hero-title {
        font-size: 1.15rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-highlights {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .highlight-card {
        flex: 1;
        min-width: 140px;
    }

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

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 640px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10, 15, 28, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-name {
        font-size: 2.2rem;
    }

    .hero-title {
        font-size: 1.05rem;
    }

    .section {
        padding: 64px 0;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .filter-buttons {
        flex-direction: column;
    }

    .filter-btn {
        text-align: center;
    }

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

    .about-highlights {
        flex-direction: column;
    }

    .timeline {
        padding-left: 24px;
    }
}