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

:root {
    --bg-dark: #0a0a0a;
    --bg-card: #141414;
    --bg-hover: #1a1a1a;
    --accent: #10b981;
    --accent-glow: rgba(16, 185, 129, 0.15);
    --accent-bright: #34d399;
    --text: #f5f5f5;
    --text-muted: #a3a3a3;
    --text-dim: #737373;
    --border: #262626;
    --border-light: #333333;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'Space Grotesk', sans-serif;
    --radius: 12px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--sans);
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 40px 32px;
    z-index: 100;
}

.sidebar-header {
    margin-bottom: 48px;
}

.logo-mark {
    display: inline-flex;
    gap: 2px;
    margin-bottom: 16px;
}

.logo-letter {
    width: 40px;
    height: 40px;
    background: var(--accent);
    color: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 8px;
}

.sidebar-name {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.3px;
    margin-bottom: 4px;
}

.sidebar-role {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
}

.sidebar-nav {
    flex: 1;
}

.sidebar-nav ul {
    list-style: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: var(--radius);
    transition: all 0.2s var(--ease);
    margin-bottom: 4px;
    position: relative;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    border-radius: 2px;
    transform: scaleY(0);
    transition: transform 0.2s var(--ease);
}

.nav-item:hover,
.nav-item.active {
    color: var(--text);
    background: var(--bg-hover);
}

.nav-item:hover::before,
.nav-item.active::before {
    transform: scaleY(1);
}

.nav-num {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    min-width: 20px;
}

.sidebar-footer {
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.sidebar-email,
.sidebar-phone {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.75rem;
    padding: 6px 0;
    transition: color 0.2s;
    font-family: var(--mono);
}

.sidebar-email:hover,
.sidebar-phone:hover {
    color: var(--accent);
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 200;
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0;
}

.menu-line {
    width: 20px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s var(--ease);
    transform-origin: center;
}

.menu-toggle.open .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.open .menu-line:nth-child(2) {
    opacity: 0;
}

.menu-toggle.open .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Main content */
.main-content {
    margin-left: 280px;
    min-height: 100vh;
}

.content-section {
    padding: 80px 64px;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s var(--ease);
}

.content-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-inner {
    max-width: 900px;
}

.section-header {
    margin-bottom: 48px;
}

.section-label {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 8px;
}

.section-heading {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.2;
}

/* About section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 240px;
    gap: 48px;
}

.about-main p {
    color: var(--text-muted);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.lead {
    font-size: 1.1rem !important;
    color: var(--text) !important;
    line-height: 1.8;
}

.accent {
    color: var(--accent-bright);
    font-weight: 500;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.stat-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Education section */
.edu-cards {
    display: grid;
    gap: 24px;
}

.edu-card {
    background: var(--bg-card);
    padding: 32px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s var(--ease);
}

.edu-card:hover {
    border-color: var(--border-light);
}

.edu-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.edu-card:hover::after {
    opacity: 1;
}

.edu-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--accent-glow);
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.edu-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.edu-spec {
    color: var(--accent-bright);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.edu-detail {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.edu-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.edu-tags span {
    padding: 6px 14px;
    background: var(--bg-hover);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Achievements section */
.achieve-list {
    position: relative;
}

.achieve-item {
    display: flex;
    gap: 32px;
    margin-bottom: 48px;
}

.achieve-item:last-child {
    margin-bottom: 0;
}

.achieve-marker {
    position: relative;
    flex-shrink: 0;
    width: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.marker-ring {
    width: 16px;
    height: 16px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    background: var(--bg-dark);
    position: relative;
    z-index: 1;
}

.marker-line {
    flex: 1;
    width: 2px;
    background: var(--border);
    margin-top: 8px;
}

.achieve-item:last-child .marker-line {
    display: none;
}

.achieve-body {
    flex: 1;
    padding-bottom: 48px;
}

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

.achieve-year {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--accent);
    display: block;
    margin-bottom: 8px;
}

.achieve-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.achieve-body p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

/* Goals section */
.goals-mosaic {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.goal-tile {
    background: var(--bg-card);
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: all 0.3s var(--ease);
}

.goal-tile:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
}

.tile-primary {
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(145deg, var(--bg-card), var(--bg-hover));
    border-color: var(--accent-glow);
}

.tile-wide {
    grid-column: span 2;
}

.tile-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 20px;
    color: var(--accent);
}

.tile-icon svg {
    width: 100%;
    height: 100%;
}

.goal-tile h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.goal-tile p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.7;
}

/* Contact section */
.contact-block {
    max-width: 600px;
}

.contact-message {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-methods {
    display: flex;
    gap: 20px;
}

.method-card {
    flex: 1;
    background: var(--bg-card);
    padding: 28px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: all 0.3s var(--ease);
}

.method-card:hover {
    border-color: var(--accent-glow);
}

.method-icon {
    width: 36px;
    height: 36px;
    color: var(--accent);
    margin-bottom: 16px;
}

.method-icon svg {
    width: 100%;
    height: 100%;
}

.method-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.method-value {
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
    word-break: break-all;
}

.method-value:hover {
    color: var(--accent);
}

/* Footer */
.content-footer {
    padding: 40px 64px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.content-footer p {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Responsive */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: row;
        justify-content: space-between;
    }

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

    .tile-primary {
        grid-row: auto;
    }

    .tile-wide {
        grid-column: auto;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s var(--ease);
        width: 260px;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .menu-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
    }

    .content-section {
        padding: 80px 24px;
    }

    .content-footer {
        padding: 32px 24px;
    }

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

    .contact-methods {
        flex-direction: column;
    }

    .goals-mosaic {
        grid-template-columns: 1fr;
    }

    .achieve-item {
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .section-heading {
        font-size: 1.75rem;
    }

    .edu-card {
        padding: 24px;
    }

    .goal-tile {
        padding: 24px;
    }
}