:root {
    color-scheme: light;
    --bg: #f5f1e8;
    --bg-accent: rgba(18, 18, 16, 0.04);
    --surface: rgba(255, 251, 245, 0.82);
    --surface-strong: #fffdf9;
    --surface-muted: #ede7dc;
    --panel: rgba(255, 252, 247, 0.92);
    --text: #141412;
    --text-muted: #666155;
    --text-soft: #8f897b;
    --border: rgba(20, 20, 18, 0.12);
    --border-strong: rgba(20, 20, 18, 0.2);
    --shadow: 0 22px 60px rgba(25, 20, 9, 0.08);
    --shadow-soft: 0 12px 30px rgba(25, 20, 9, 0.06);
    --accent: #141412;
    --accent-contrast: #fffdf8;
    --success-bg: #e7f6ea;
    --success-border: rgba(39, 110, 64, 0.25);
    --success-text: #1f6b3b;
    --danger-bg: #fae8e7;
    --danger-border: rgba(153, 51, 45, 0.22);
    --danger-text: #922b21;
    --focus: rgba(24, 24, 20, 0.16);
    --page-width: 1240px;
    --radius-xs: 10px;
    --radius-sm: 16px;
    --radius-md: 24px;
    --radius-lg: 32px;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #090908;
    --bg-accent: rgba(255, 255, 255, 0.045);
    --surface: rgba(16, 16, 14, 0.82);
    --surface-strong: #11110f;
    --surface-muted: #181815;
    --panel: rgba(11, 11, 10, 0.94);
    --text: #f2efe8;
    --text-muted: #afaa9c;
    --text-soft: #878173;
    --border: rgba(255, 255, 255, 0.11);
    --border-strong: rgba(255, 255, 255, 0.18);
    --shadow: 0 22px 60px rgba(0, 0, 0, 0.38);
    --shadow-soft: 0 12px 30px rgba(0, 0, 0, 0.28);
    --accent: #f3f0e9;
    --accent-contrast: #121210;
    --success-bg: rgba(28, 72, 41, 0.28);
    --success-border: rgba(67, 148, 91, 0.28);
    --success-text: #98d8ad;
    --danger-bg: rgba(101, 36, 32, 0.34);
    --danger-border: rgba(179, 87, 81, 0.3);
    --danger-text: #f2a8a1;
    --focus: rgba(243, 240, 233, 0.16);
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Space Grotesk", sans-serif;
    line-height: 1.6;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(187, 176, 148, 0.14), transparent 28%),
        radial-gradient(circle at top right, rgba(108, 102, 88, 0.12), transparent 24%),
        linear-gradient(180deg, var(--bg), color-mix(in srgb, var(--bg) 78%, black 4%));
    transition: background-color 0.25s ease, color 0.25s ease;
}

a {
    color: inherit;
}

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

button,
input,
select,
textarea {
    font: inherit;
}

.site-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.shell-inner {
    width: min(calc(100% - 2rem), var(--page-width));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: color-mix(in srgb, var(--panel) 92%, transparent);
    border-bottom: 1px solid var(--border);
}

.site-header .shell-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 1.5rem;
    padding: 1rem 0;
    flex-wrap: wrap;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    text-decoration: none;
    min-width: 0;
}

.brand-symbol {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.7rem;
    height: 2.7rem;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--surface-strong);
    box-shadow: var(--shadow-soft);
    font-size: 0.95rem;
}

.brand-symbol-image {
    overflow: hidden;
    padding: 0;
}

.brand-symbol-image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.brand-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.brand-name {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.brand-tagline {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.72rem;
    color: var(--text-soft);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    flex: 1 1 540px;
    flex-wrap: wrap;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.75rem 1rem;
    border-radius: 999px;
    text-decoration: none;
    color: var(--text-muted);
    border: 1px solid transparent;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--text);
    background: var(--surface-muted);
    border-color: var(--border);
    transform: translateY(-1px);
    outline: none;
}

.nav-link i {
    font-size: 0.88rem;
}

.nav-link-strong {
    color: var(--accent-contrast);
    background: var(--accent);
}

.nav-link-strong:hover,
.nav-link-strong:focus-visible {
    color: var(--accent-contrast);
    background: color-mix(in srgb, var(--accent) 86%, transparent);
    border-color: transparent;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-strong);
    color: var(--text);
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
    transform: translateY(-1px);
    border-color: var(--border-strong);
    outline: none;
}

.theme-toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.6rem;
    height: 1.6rem;
}

.theme-toggle-label {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.site-main {
    flex: 1;
    width: min(calc(100% - 2rem), var(--page-width));
    margin: 0 auto;
    padding: 2rem 0 4rem;
}

.flash-stack {
    max-width: 860px;
    margin: 0 auto 1.5rem;
    display: grid;
    gap: 0.85rem;
}

.alert {
    padding: 1rem 1.1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface-strong);
    box-shadow: var(--shadow-soft);
}

.alert-success {
    background: var(--success-bg);
    border-color: var(--success-border);
    color: var(--success-text);
}

.alert-error,
.alert-danger {
    background: var(--danger-bg);
    border-color: var(--danger-border);
    color: var(--danger-text);
}

.page-header,
.contact-container,
.auth-container,
.profile-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.page-header {
    text-align: center;
    padding: 1.2rem;
}

.contact-container {
    max-width: 760px;
    margin: 1.5rem auto 0;
    padding: clamp(1.4rem, 3vw, 2.4rem);
}

.success-message-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 10vh;
    text-align: center;
}

.ai-heading {
    margin: 0 0 1.5rem;
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.05;
    letter-spacing: -0.04em;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.55rem;
    color: var(--text-muted);
    font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-control {
    width: 100%;
    padding: 0.9rem 1rem;
    color: var(--text);
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-control:focus {
    outline: none;
    border-color: var(--border-strong);
    box-shadow: 0 0 0 4px var(--focus);
}

button[type="submit"],
.submit-btn,
.google-btn,
.logout-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.95rem 1.2rem;
    border: 1px solid transparent;
    border-radius: 999px;
    background: var(--accent);
    color: var(--accent-contrast);
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-soft);
}

button[type="submit"]:hover,
.submit-btn:hover,
.google-btn:hover,
.logout-btn:hover {
    transform: translateY(-1px);
    opacity: 0.96;
}

.site-footer {
    border-top: 1px solid var(--border);
    background: color-mix(in srgb, var(--panel) 94%, transparent);
    backdrop-filter: blur(18px);
}

.site-footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    gap: 2rem;
    padding: 2.4rem 0;
}

.brand-mark-footer {
    margin-bottom: 1rem;
}

.footer-copy {
    max-width: 42rem;
    margin: 0;
    color: var(--text-muted);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem 1.2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: var(--text);
    outline: none;
}

.post-columns-wrapper {
    position: relative;
    padding: 0.75rem 0 1rem;
    display: flex;
    justify-content: flex-start;
    width: 100%;
    overflow-x: auto;
    font-size: 0.8rem;
}

.post-columns-wrapper::after {
    content: "Scroll";
    position: absolute;
    right: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--accent);
    color: var(--accent-contrast);
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    pointer-events: none;
    opacity: 0.8;
}

.post-columns {
    display: flex;
    gap: 1.5rem;
    width: max-content;
    flex-wrap: nowrap;
    overflow-x: auto;
    margin: 1.5rem auto;
    padding-inline: clamp(1rem, 8vw, 14rem);
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--text-soft) transparent;
}

.column {
    flex: 0 0 320px;
    min-width: 320px;
    max-width: 320px;
}

.panel-heading,
.map-container,
.post,
.post .summary {
    background: var(--surface);
    border: 1px solid var(--border);
}

.panel-heading {
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.panel-body {
    padding: 1rem;
    max-height: 80vh;
    overflow-y: auto;
    overflow-x: auto;
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-top: 0;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.post {
    border-radius: var(--radius-sm);
    padding: 1.2rem;
    margin: 0.9rem 0;
    box-shadow: var(--shadow-soft);
}

.post .title,
.post .repo_full_name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
}

.post .author,
.post .owner,
.post .description,
.post .stars,
.post .summary,
.post .label,
.twittersrc .title a,
.twittersrc .author,
.twittersrc .author a {
    color: var(--text-muted);
}

.hrline {
    margin: 1.25rem 0;
    border-bottom: 1px solid var(--border);
}

@media (max-width: 1024px) {
    .site-header .shell-inner {
        justify-content: center;
    }

    .site-nav {
        order: 3;
        flex-basis: 100%;
    }

    .theme-toggle {
        margin-left: auto;
    }
}

@media (max-width: 768px) {
    .shell-inner,
    .site-main {
        width: min(calc(100% - 1rem), var(--page-width));
    }

    .site-main {
        padding: 1.25rem 0 3rem;
    }

    .brand-tagline,
    .theme-toggle-label {
        display: none;
    }

    .site-footer-grid,
    .footer-links {
        grid-template-columns: 1fr;
    }

    .post-columns {
        padding-inline: 0.25rem;
        gap: 0.9rem;
    }

    .column {
        flex: 0 0 85vw;
        min-width: 85vw;
        max-width: 85vw;
    }
}