/* =========================================
   Jupyter Lab inspired portfolio dashboard
   Cleaner, content-first, human-made feel
   ========================================= */

:root {
    --bg: #0d1117;
    --notebook-bg: #161b22;
    --cell-bg: #1c2128;
    --cell-border: #30363d;
    --gutter: #21262d;
    --text: #c9d1d9;
    --text-muted: #8b949e;
    --accent: #f37626;           /* Jupyter orange */
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-purple: #a371f7;
    --accent-yellow: #d29922;
    --accent-red: #f85149;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    line-height: 1.65;
    min-height: 100vh;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 10000;
    padding: 10px 14px;
    border-radius: 6px;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    transform: translateY(-160%);
    transition: transform 0.2s;
}

.skip-link:focus { transform: translateY(0); }

.notice {
    padding: 12px 18px;
    background: var(--accent-yellow);
    color: #0d1117;
    text-align: center;
    font-weight: 600;
}

:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 3px;
}

/* Notebook layout */
.notebook {
    display: flex;
    max-width: 1180px;
    margin: 0 auto;
    min-height: 100vh;
    background: var(--notebook-bg);
}

.gutter {
    width: 72px;
    flex-shrink: 0;
    background: var(--gutter);
    border-right: 1px solid var(--cell-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 32px;
    position: sticky;
    top: 0;
    height: 100vh;
}

.gutter-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    margin-bottom: 16px;
}

.gutter-line {
    width: 2px;
    flex: 1;
    background: linear-gradient(180deg, var(--cell-border) 0%, transparent 100%);
}

.content {
    flex: 1;
    padding: 36px 28px 64px;
}

/* Cells */
.cell {
    background: var(--cell-bg);
    border: 1px solid var(--cell-border);
    border-radius: var(--radius);
    margin-bottom: 22px;
    overflow: hidden;
    opacity: 0;
    transform: translateY(12px);
    animation: fadeIn 0.5s ease forwards;
}

.cell:nth-child(1) { animation-delay: 0.04s; }
.cell:nth-child(2) { animation-delay: 0.08s; }
.cell:nth-child(3) { animation-delay: 0.12s; }
.cell:nth-child(4) { animation-delay: 0.16s; }
.cell:nth-child(5) { animation-delay: 0.20s; }
.cell:nth-child(6) { animation-delay: 0.24s; }

@keyframes fadeIn {
    to { opacity: 1; transform: translateY(0); }
}

.cell-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    background: rgba(48, 54, 61, 0.35);
    border-bottom: 1px solid var(--cell-border);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.prompt {
    color: var(--accent);
    font-weight: 700;
    user-select: none;
}

.cell-title {
    color: var(--text-muted);
    font-weight: 500;
}

.cell-body {
    padding: 26px;
}

/* Hero */
.hero-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 34px;
    align-items: center;
}

.avatar-wrap {
    position: relative;
}

.avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--cell-border);
    object-fit: cover;
    background: var(--gutter);
}

.status-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 20px;
    height: 20px;
    background: var(--accent-green);
    border: 3px solid var(--cell-bg);
    border-radius: 50%;
}

.hero-text h1 {
    margin: 0 0 6px;
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.role {
    margin: 0 0 6px;
    font-size: 1.1rem;
    color: var(--accent-blue);
    font-weight: 600;
    font-family: var(--font-mono);
}

.education {
    margin: 0 0 14px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.hero-about {
    margin: 0 0 16px;
    max-width: 560px;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 18px;
    font-size: 0.9rem;
}

.hero-meta a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px dashed var(--text-muted);
    transition: color 0.2s, border-color 0.2s;
}

.hero-meta a:hover {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
}

.hero-actions {
    display: flex;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 9px 18px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: transform 0.15s, filter 0.15s;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--cell-border);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
}

/* Subsection titles */
.subsection-title {
    margin: 0 0 14px;
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.about-card {
    padding: 22px;
    border-radius: var(--radius);
    background: rgba(13, 17, 23, 0.45);
    border: 1px solid var(--cell-border);
    transition: border-color 0.2s;
}

.about-card:hover {
    border-color: #484f58;
}

.about-card h3 {
    margin: 0 0 8px;
    font-size: 1rem;
    color: var(--text);
}

.about-card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* Skills */
.skills-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.skill-bars {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.skill-row {
    display: grid;
    grid-template-columns: 120px 1fr 44px;
    align-items: center;
    gap: 12px;
    font-size: 0.88rem;
}

.skill-name {
    color: var(--text-muted);
}

.skill-track {
    height: 7px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    overflow: hidden;
}

.skill-fill {
    height: 100%;
    border-radius: 999px;
    background: var(--accent-blue);
    transition: width 1s ease;
}

.skill-value {
    text-align: right;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 22px;
}

.skill-tag {
    padding: 5px 11px;
    border-radius: 999px;
    background: rgba(88, 166, 255, 0.1);
    color: var(--accent-blue);
    font-size: 0.78rem;
    font-weight: 500;
    border: 1px solid rgba(88, 166, 255, 0.18);
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
}

.tool-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--cell-border);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: border-color 0.2s, color 0.2s;
}

.tool-item:hover {
    color: var(--text);
    border-color: var(--accent);
}

/* KPI */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
    margin-bottom: 26px;
}

.kpi-card {
    background: rgba(13, 17, 23, 0.45);
    border: 1px solid var(--cell-border);
    border-radius: var(--radius);
    padding: 18px;
    text-align: center;
    transition: border-color 0.2s;
}

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

.kpi-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent);
    font-family: var(--font-mono);
}

.kpi-label {
    margin-top: 5px;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.chart-card {
    background: rgba(13, 17, 23, 0.35);
    border: 1px solid var(--cell-border);
    border-radius: var(--radius);
    padding: 20px;
}

.chart-card.wide {
    grid-column: span 2;
}

.chart-title {
    margin: 0 0 14px;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
}

.chart-wrap {
    position: relative;
    height: 260px;
}

/* Projects */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.filter-btn {
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid var(--cell-border);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.filter-btn:hover {
    border-color: var(--text-muted);
    color: var(--text);
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.project-card {
    background: rgba(13, 17, 23, 0.35);
    border: 1px solid var(--cell-border);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-blue);
}

.project-card.hidden {
    display: none;
}

.project-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.project-name {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.project-name a {
    color: var(--text);
    text-decoration: none;
}

.project-name a:hover {
    color: var(--accent-blue);
}

.project-lang {
    font-size: 0.72rem;
    padding: 3px 7px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.project-desc {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin: 0 0 14px;
    flex: 1;
    line-height: 1.55;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 14px;
}

.project-tag {
    font-size: 0.7rem;
    padding: 3px 7px;
    border-radius: 4px;
    background: rgba(88, 166, 255, 0.1);
    color: var(--accent-blue);
    border: 1px solid rgba(88, 166, 255, 0.12);
}

.project-footer {
    display: flex;
    gap: 14px;
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    padding-top: 12px;
    border-top: 1px solid var(--cell-border);
}

.project-footer span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* Contact */
.contact-box {
    padding: 20px 24px;
    background: rgba(13, 17, 23, 0.35);
    border: 1px solid var(--cell-border);
    border-radius: var(--radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-box p {
    margin: 0;
    color: var(--text-muted);
    max-width: 520px;
}

.contact-actions {
    display: flex;
    gap: 10px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px 0 0;
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* Responsive */
@media (max-width: 900px) {
    .gutter { display: none; }
    .content { padding: 22px 18px 48px; }

    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-about, .hero-meta, .hero-actions {
        justify-content: center;
    }

    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .skills-layout { grid-template-columns: 1fr; }
    .charts-grid, .chart-card.wide { grid-template-columns: 1fr; grid-column: span 1; }
    .projects-grid { grid-template-columns: 1fr; }
    .contact-box { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr; }
    .hero-text h1 { font-size: 1.7rem; }
    .skill-row { grid-template-columns: 100px 1fr 36px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}