:root,
[data-theme="dark"] {
    --bg: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --border: #3c3c3c;
    --text: #cccccc;
    --text-muted: #858585;
    --accent: #007acc;
    --accent-hover: #1a8ad4;
    --success: #4ec9b0;
    --shadow: rgba(0, 0, 0, 0.35);
    --header-bg: rgba(37, 37, 38, 0.95);
    --card-bg: #252526;
    --code-bg: #1e1e1e;
    --focus-ring: #007fd4;
}

[data-theme="light"] {
    --bg: #f3f3f3;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8e8;
    --border: #d4d4d4;
    --text: #333333;
    --text-muted: #6e6e6e;
    --accent: #0078d4;
    --accent-hover: #106ebe;
    --success: #107c10;
    --shadow: rgba(0, 0, 0, 0.12);
    --header-bg: rgba(255, 255, 255, 0.95);
    --card-bg: #ffffff;
    --code-bg: #f6f8fa;
    --focus-ring: #0078d4;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: min(1120px, calc(100% - 2rem));
    margin-inline: auto;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1rem;
    z-index: 1000;
}

.skip-link:focus {
    left: 1rem;
    top: 1rem;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--header-bg);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 64px;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text);
    font-weight: 600;
}

.site-logo__mark {
    color: var(--accent);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.site-nav {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.site-nav a {
    color: var(--text-muted);
    font-size: 0.95rem;
}

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

.site-header__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.lang-switcher {
    display: inline-flex;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.4rem;
}

.lang-switcher__link {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem;
    border-radius: 4px;
    text-decoration: none;
    line-height: 0;
    opacity: 0.75;
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.lang-switcher__flag {
    display: block;
    width: 24px;
    height: 18px;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.2);
    flex-shrink: 0;
}

.lang-switcher__link:hover {
    opacity: 1;
}

.lang-switcher__link.is-active {
    opacity: 1;
}

.lang-switcher__link.is-active .lang-switcher__flag {
    box-shadow: 0 0 0 2px var(--accent);
}

/* Buttons */
.btn,
.btn-icon {
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1rem;
    font-size: 0.95rem;
    font-weight: 500;
}

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

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

.btn-secondary:hover,
.btn-ghost:hover {
    background: var(--bg-tertiary);
}

.btn-ghost {
    background: transparent;
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.btn-icon:hover {
    background: var(--bg-tertiary);
}

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

/* Hero */
.hero {
    padding: 4rem 0 3rem;
}

.hero__inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
    align-items: center;
}

.hero__eyebrow {
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.85rem;
    margin: 0 0 0.75rem;
}

.hero__title {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    margin: 0 0 1rem;
}

.hero__subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 52ch;
    margin: 0 0 1rem;
}

.hero__geo-summary {
    color: var(--text-muted);
    font-size: 0.98rem;
    max-width: 58ch;
    margin: 0 0 1.5rem;
    line-height: 1.7;
}

.hero__geo-summary strong,
.hero__subtitle strong {
    color: var(--text);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero__card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 12px 40px var(--shadow);
}

.hero__card-header {
    display: flex;
    gap: 0.4rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.hero__code {
    margin: 0;
    padding: 1.25rem;
    overflow-x: auto;
    background: var(--code-bg);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9rem;
    line-height: 1.7;
}

.code-key { color: #569cd6; }
.code-prop { color: #9cdcfe; }
.code-str { color: #ce9178; }

/* Sections */
.section {
    padding: 4rem 0;
}

.section-alt {
    background: var(--bg-secondary);
    border-block: 1px solid var(--border);
}

.section__header {
    margin-bottom: 2rem;
}

.section__header h2 {
    margin: 0 0 0.5rem;
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.section__header p {
    margin: 0;
    color: var(--text-muted);
    max-width: 60ch;
}

/* Tools */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.tool-card__image-link {
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.tool-card__image-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.2s ease;
}

.tool-card:hover .tool-card__image-link img {
    transform: scale(1.02);
}

.tool-card__body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
}

.tool-card__body h3 {
    margin: 0;
    font-size: 1.25rem;
}

.tool-card__headline {
    margin: 0;
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: 600;
}

.tool-card__features {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.tool-card__features li + li {
    margin-top: 0.35rem;
}

.tool-card__audience {
    margin: 0;
    font-size: 0.92rem;
    color: var(--text-muted);
}

.tool-card__body p {
    margin: 0;
    color: var(--text-muted);
    flex: 1;
}

.tool-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 999px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-muted);
}

.tool-card__actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 0.25rem;
}

.tool-card__actions-main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
    gap: 0.5rem;
}

.tool-card__actions-main .btn,
.tool-card__actions-github {
    width: 100%;
    justify-content: center;
}

/* Stack */
.stack-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.stack-badge {
    padding: 0.5rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    font-size: 0.9rem;
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.service-card {
    padding: 1.25rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--card-bg);
}

.service-card h3 {
    margin: 0 0 0.75rem;
    font-size: 1.1rem;
}

.service-card p {
    margin: 0;
    color: var(--text-muted);
}

.hire-cta {
    margin-top: 0.25rem;
    padding: 1.75rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
}

.hire-cta__title {
    margin: 0;
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 52ch;
}

.hire-cta__tags {
    justify-content: center;
}

.hire-cta__button {
    margin-top: 0.25rem;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: 0.75rem;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card-bg);
    padding: 0 1rem;
}

.faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 1rem 0;
    font-weight: 600;
    color: var(--text);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    float: right;
    color: var(--accent);
    font-size: 1.2rem;
    line-height: 1;
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-item p {
    margin: 0 0 1rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.project-card {
    padding: 1.25rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--card-bg);
}

.project-card h3 {
    margin: 0 0 0.5rem;
}

.project-card p {
    margin: 0 0 0.75rem;
    color: var(--text-muted);
}

.project-card__stack {
    font-size: 0.85rem;
    color: var(--accent);
}

/* Contact */
.contact-card {
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--card-bg);
}

.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.contact-link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
}

.contact-link:hover {
    border-color: var(--accent);
}

.contact-link__label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.contact-link__value {
    font-weight: 600;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0 2rem;
}

.site-footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.site-footer__links {
    display: flex;
    gap: 1rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero__inner {
        grid-template-columns: 1fr;
    }

    .site-nav {
        display: none;
    }
}

@media (max-width: 600px) {
    .hero {
        padding-top: 2.5rem;
    }

    .section {
        padding: 3rem 0;
    }

    .hero__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }
}

:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}