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

/* Dark theme (default) */
:root,
[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2128;
    --bg-card-hover: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #a0aab5;
    --text-muted: #6b7685;
    --accent: #9b72cf;
    --accent-light: #c9a0ff;
    --accent-green: #3fb950;
    --accent-green-muted: #2ea04370;
    --border: #30363d;
    --hover-bg: #21262d;
}

/* Light theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-card: #ffffff;
    --bg-card-hover: #f6f8fa;
    --text-primary: #1f2328;
    --text-secondary: #656d76;
    --text-muted: #8b949e;
    --accent: #7c3aed;
    --accent-light: #6d28d9;
    --accent-green: #1a7f37;
    --accent-green-muted: #1a7f3720;
    --border: #d0d7de;
    --hover-bg: #f3f4f6;
}

/* WCAG accessible - light */
[data-a11y="true"],
[data-a11y="true"][data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f0f0;
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-muted: #555555;
    --accent: #0000cc;
    --accent-light: #0000cc;
    --accent-green: #006600;
    --accent-green-muted: #00660020;
    --border: #666666;
    --hover-bg: #e8e8e8;
}

    /* WCAG accessible - dark */
    [data-a11y="true"][data-theme="dark"] {
        --bg-primary: #000000;
        --bg-secondary: #0a0a0a;
        --bg-card: #111111;
        --bg-card-hover: #1a1a1a;
        --text-primary: #ffffff;
        --text-secondary: #e0e0e0;
        --text-muted: #bbbbbb;
        --accent: #6fa3ff;
        --accent-light: #6fa3ff;
        --accent-green: #5cff5c;
        --accent-green-muted: #5cff5c20;
        --border: #888888;
        --hover-bg: #1a1a1a;
    }

/* Light theme overrides */
[data-theme="light"] .about-title,
[data-theme="light"] .contact-title {
    background: linear-gradient(135deg, var(--accent), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .project-card {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

    [data-theme="light"] .project-card.featured {
        background: rgba(124, 58, 237, 0.03);
    }

[data-theme="light"] .skill-tag.primary {
    background: rgba(124, 58, 237, 0.08);
}

[data-theme="light"] .skill-tag.cert {
    background: rgba(26, 127, 55, 0.08);
}

/* WCAG overrides */
[data-a11y="true"] body {
    font-size: 16px;
    line-height: 1.8;
}

[data-a11y="true"] .about-title,
[data-a11y="true"] .contact-title {
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: var(--text-primary);
    background-clip: unset;
}

[data-a11y="true"] .about-text,
[data-a11y="true"] .project-description,
[data-a11y="true"] .timeline-text,
[data-a11y="true"] .experience-points li,
[data-a11y="true"] .deep-dive-summary {
    font-size: 16px;
    line-height: 1.8;
}

[data-a11y="true"] .nav-tab {
    font-size: 15px;
    padding: 12px 24px;
}

@media (max-width: 768px) {
    [data-a11y="true"] .nav-tab {
        font-size: 13px;
        padding: 10px 8px;
    }
}

[data-a11y="true"] .skill-tag,
[data-a11y="true"] .tech-tag {
    font-size: 14px;
    padding: 6px 12px;
}

[data-a11y="true"] .project-card,
[data-a11y="true"] .certification-card,
[data-a11y="true"] .contact-card {
    border-width: 2px;
}

[data-a11y="true"] .project-name,
[data-a11y="true"] .experience-role,
[data-a11y="true"] .timeline-title {
    font-size: 18px;
}

[data-a11y="true"] .project-link {
    text-decoration: underline;
    font-size: 15px;
}

[data-a11y="true"] *:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

[data-a11y="true"] .nav-tab.active {
    border-bottom-width: 3px;
}

[data-a11y="true"] .timeline-marker {
    width: 16px;
    height: 16px;
}

[data-a11y="true"] .experience-icon {
    width: 44px;
    height: 44px;
}

[data-a11y="true"] a {
    text-decoration: underline;
}

[data-a11y="true"] .certification-card,
[data-a11y="true"] .contact-card {
    text-decoration: none;
}

    [data-a11y="true"] .certification-card:hover,
    [data-a11y="true"] .contact-card:hover {
        text-decoration: underline;
    }

/* Base styles */
body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.app {
    max-width: 900px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    z-index: 100;
    border-bottom: 1px solid var(--border);
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px 12px;
}

.logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Theme toggle */
.theme-toggle,
.a11y-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

    .theme-toggle:hover,
    .a11y-toggle:hover {
        background: var(--hover-bg);
        border-color: var(--accent);
    }

.theme-icon,
.a11y-icon {
    width: 16px;
    height: 16px;
    fill: var(--text-secondary);
    transition: fill 0.15s ease;
}

.theme-toggle:hover .theme-icon,
.a11y-toggle:hover .a11y-icon {
    fill: var(--text-primary);
}

.theme-icon.moon {
    display: block;
}

.theme-icon.sun {
    display: none;
}

[data-theme="light"] .theme-icon.moon {
    display: none;
}

[data-theme="light"] .theme-icon.sun {
    display: block;
}

.a11y-toggle.active {
    border-color: var(--accent-green);
    background: var(--accent-green-muted);
}

    .a11y-toggle.active .a11y-icon {
        fill: var(--accent-green);
    }

/* Navigation */
.nav-bar {
    display: flex;
    padding: 0 24px;
    border-top: 1px solid var(--border);
}

.nav-tab {
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

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

    .nav-tab.active {
        color: var(--accent-light);
        border-bottom-color: var(--accent-light);
    }

/* Main */
.main {
    flex: 1;
    padding: 32px 24px;
}

/* Tab content */
.tab-content {
    display: none;
    animation: fadeIn 0.2s ease;
}

    .tab-content.active {
        display: block;
    }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

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

/* About section */
.about-hero {
    margin-bottom: 32px;
}

.about-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.about-body {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.about-heading {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.about-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 8px;
}

/* Skills */
.skills-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.skill-category-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

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

.skill-tag {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

    .skill-tag.primary {
        border-color: var(--accent);
        color: var(--accent-light);
        background: rgba(155, 114, 207, 0.1);
    }

    .skill-tag.cert {
        border-color: var(--accent-green);
        color: var(--accent-green);
        background: var(--accent-green-muted);
    }

/* Page title */
.page-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

/* Projects */
.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-card {
    padding: 24px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: border-color 0.15s ease;
}

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

    .project-card.featured {
        border-color: var(--accent);
        background: rgba(155, 114, 207, 0.03);
    }

    .project-card.clickable {
        cursor: pointer;
        transition: border-color 0.15s ease, transform 0.15s ease;
    }

        .project-card.clickable:hover {
            transform: translateY(-2px);
        }

.project-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.project-icon {
    font-size: 24px;
}

.project-name {
    font-size: 18px;
    font-weight: 600;
}

.project-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.tech-tag {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--accent-green);
}

.project-links {
    display: flex;
    gap: 12px;
}

.project-link {
    font-size: 13px;
    color: var(--accent-light);
    text-decoration: none;
    transition: opacity 0.15s ease;
}

    .project-link:hover {
        opacity: 0.8;
    }

.project-dive-hint {
    display: block;
    margin-top: 12px;
    font-size: 11px;
    color: var(--text-muted);
    font-style: italic;
    transition: color 0.15s ease;
}

.project-card.clickable:hover .project-dive-hint {
    color: var(--accent-light);
}

/* Back button */
.back-button {
    background: none;
    border: none;
    color: var(--accent-light);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    padding: 8px 0;
    margin-bottom: 24px;
    transition: opacity 0.15s ease;
}

    .back-button:hover {
        opacity: 0.8;
    }

/* Deep dive */
.deep-dive-hero {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 32px;
}

.deep-dive-hero-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.deep-dive-icon {
    font-size: 28px;
}

.deep-dive-title {
    font-size: 22px;
    font-weight: 700;
}

.deep-dive-summary {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
}

.timeline-entry {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    padding-left: 8px;
}

.timeline-marker {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    margin-top: 6px;
    position: relative;
}

    .timeline-marker::after {
        content: "";
        position: absolute;
        left: 5px;
        top: 12px;
        width: 2px;
        height: calc(100% + 12px);
        background: var(--border);
    }

.timeline-entry:last-child .timeline-marker::after {
    display: none;
}

.timeline-marker.challenge {
    background: var(--accent-green);
}

.timeline-content {
    flex: 1;
    padding-bottom: 8px;
}

.timeline-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-text {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Experience */
.experience-section {
    margin-bottom: 40px;
}

.experience-heading {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.experience-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.experience-item {
    display: flex;
    gap: 16px;
    padding: 16px 0;
}

.experience-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    flex-shrink: 0;
    margin-top: 2px;
    object-fit: contain;
    background: var(--bg-secondary);
    padding: 4px;
}

.experience-icon-placeholder {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    flex-shrink: 0;
    margin-top: 2px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
}

.experience-content {
    flex: 1;
}

.experience-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 4px;
}

.experience-role {
    font-size: 15px;
    font-weight: 600;
}

.experience-date {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}

.experience-company {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.experience-points {
    list-style: none;
    padding: 0;
    margin-bottom: 12px;
}

    .experience-points li {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.6;
        padding-left: 16px;
        position: relative;
        margin-bottom: 4px;
    }

        .experience-points li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 9px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--border);
        }

.experience-tech-used {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

/* Certifications */
.certifications-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.certification-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, transform 0.15s ease;
}

    .certification-card:hover {
        border-color: var(--accent);
        transform: translateY(-2px);
    }

        .certification-card:hover .certification-name {
            color: var(--accent-light);
        }

.certification-badge-icon {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.certification-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.certification-name {
    font-size: 13px;
    font-weight: 600;
}

.certification-date {
    font-size: 11px;
    color: var(--text-muted);
}

/* Contact page */
.contact-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 20px;
}

.contact-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-links-centered {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 400px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

    .contact-card:hover {
        border-color: var(--accent);
        transform: translateY(-2px);
        background: var(--hover-bg);
    }

.contact-card-icon {
    width: 24px;
    height: 24px;
    fill: var(--accent-light);
    flex-shrink: 0;
}

.contact-card-label {
    font-size: 14px;
    font-weight: 600;
    min-width: 60px;
}

.contact-card-value {
    font-size: 13px;
    color: var(--text-secondary);
}

.copy-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    margin-left: auto;
    transition: background 0.15s ease, border-color 0.15s ease;
}

    .copy-button:hover {
        background: var(--hover-bg);
        border-color: var(--accent);
    }

    .copy-button.copied {
        border-color: var(--accent-green);
    }

.copy-icon {
    width: 16px;
    height: 16px;
    fill: var(--text-secondary);
    transition: fill 0.15s ease;
}

.copy-button:hover .copy-icon {
    fill: var(--text-primary);
}

.copy-button.copied .copy-icon {
    fill: var(--accent-green);
}

/* Footer */
.footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
    transition: background 0.15s ease, color 0.15s ease;
}

    .footer-link:hover {
        background: var(--hover-bg);
        color: var(--accent-light);
    }

.footer-icon {
    width: 20px;
    height: 20px;
    fill: var(--text-secondary);
    transition: fill 0.15s ease;
}

.footer-link:hover .footer-icon {
    fill: var(--accent-light);
}

.footer p {
    font-size: 12px;
    color: var(--text-muted);
}

/* Utility */
.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .header-top {
        flex-wrap: wrap;
        gap: 8px;
    }

    .nav-bar {
        padding: 0 16px;
        overflow-x: hidden;
    }

    .nav-tab {
        flex: 1;
        text-align: center;
        padding: 8px 4px;
        font-size: 12px;
        min-width: 0;
    }

    .about-title {
        font-size: 24px;
    }

    .contact-page {
        padding: 40px 16px;
    }

    .contact-title {
        font-size: 22px;
    }

    .contact-card {
        padding: 14px 16px;
    }

    .contact-card-value {
        font-size: 11px;
    }

    .experience-header {
        flex-direction: column;
        gap: 2px;
    }

    .contact-card-label {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}

@media print {
    .header,
    .footer,
    .back-button,
    .theme-toggle,
    .a11y-toggle,
    .project-dive-hint,
    .copy-button {
        display: none !important;
    }

    .app {
        max-width: 100%;
    }

    /* Only show the active tab when printing */
    .tab-content {
        display: none !important;
    }

        .tab-content.active {
            display: block !important;
        }

    .project-card,
    .contact-card,
    .certification-card,
    .experience-item,
    .timeline-entry {
        break-inside: avoid;
    }

    body {
        background: white;
        color: black;
        font-size: 12pt;
    }

    .main {
        padding: 0;
    }

    .about-title,
    .contact-title {
        background: none;
        -webkit-text-fill-color: black;
    }

    .skill-tag,
    .tech-tag {
        border-color: #ccc;
        color: black;
    }

        .skill-tag.primary {
            border-color: #666;
        }

    .project-card,
    .contact-card,
    .certification-card,
    .deep-dive-hero {
        border-color: #ccc;
        box-shadow: none;
    }

    .timeline-marker {
        background: #666;
        print-color-adjust: exact;
        -webkit-print-color-adjust: exact;
    }

        .timeline-marker.challenge {
            background: #333;
            print-color-adjust: exact;
            -webkit-print-color-adjust: exact;
        }

    .contact-card-icon,
    .footer-icon {
        fill: black;
    }

    /* Print header */
    .app::before {
        content: "portfolio.edgoran.co.uk";
        display: block;
        text-align: right;
        font-size: 9pt;
        color: #0000cc;
        text-decoration: underline;
        padding-bottom: 8px;
        margin-bottom: 16px;
        border-bottom: 1px solid #eee;
    }
}