:root {
    --bg: #fff;
    --fg: #1a1a1a;
    --subtle: #666;
    --border: #e0e0e0;
    --link: #1a5fb4;
    --danger: #c01c28;
    --accent-bg: #f5f5f5;
    --input-bg: #fff;
    --input-border: #ccc;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1a1a1a;
        --fg: #e0e0e0;
        --subtle: #999;
        --border: #333;
        --link: #78aeed;
        --danger: #e01b24;
        --accent-bg: #252525;
        --input-bg: #252525;
        --input-border: #444;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--fg);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

main { max-width: 720px; margin: 0 auto; padding: 2rem 1.5rem; }

h1, h2, h3, h4 { line-height: 1.3; margin: 1.5rem 0 0.5rem; }
h1 { font-size: 1.8rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }

p { margin: 0.75rem 0; }

a { color: var(--link); text-decoration: underline; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

pre, code {
    font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
    font-size: 0.9em;
}
code { background: var(--accent-bg); padding: 0.15em 0.4em; border-radius: 3px; }
pre { background: var(--accent-bg); padding: 1rem; border-radius: 5px; overflow-x: auto; margin: 0.75rem 0; }
pre code { background: none; padding: 0; }

blockquote {
    border-left: 3px solid var(--link);
    padding-left: 1rem;
    margin: 0.75rem 0;
    color: var(--subtle);
}

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

img { max-width: 100%; border-radius: 4px; }

input, textarea, select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--fg);
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 5px;
    margin: 0.25rem 0 0.75rem;
}
input:focus, textarea:focus { outline: 2px solid var(--link); outline-offset: 1px; }
textarea { resize: vertical; min-height: 300px; }

button, .btn {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: #fff;
    background: var(--link);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
}
button:hover, .btn:hover { opacity: 0.9; text-decoration: none; }
.btn-danger { background: var(--danger); }
.btn-secondary {
    color: var(--fg);
    background: var(--accent-bg);
    border: 1px solid var(--border);
}

.flash { padding: 0.6rem 1rem; background: var(--accent-bg); border: 1px solid var(--border); border-radius: 5px; margin-bottom: 1rem; }
.error { padding: 0.6rem 1rem; background: #fce4e4; border: 1px solid var(--danger); border-radius: 5px; margin-bottom: 1rem; color: #1a1a1a; }
@media (prefers-color-scheme: dark) { .error { background: #3d1519; color: #e0e0e0; } }

nav { display: flex; gap: 1.5rem; margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
nav a { text-decoration: none; font-weight: 500; }
nav a.active { text-decoration: underline; }

.post-item { margin-bottom: 1.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.post-item:last-child { border-bottom: none; }
.post-item h2 { margin-top: 0; }
.post-item h2 a { text-decoration: none; }
.post-item h2 a:hover { text-decoration: underline; }

.post-meta { color: var(--subtle); font-size: 0.9rem; margin: 0.25rem 0; }

.blog-header { margin-bottom: 2rem; }
.blog-header h1 { margin-top: 0; }
.blog-header p { color: var(--subtle); }

.dashboard-layout { display: flex; gap: 2rem; }
.dashboard-sidebar { flex: 0 0 160px; }
.dashboard-sidebar a { display: block; padding: 0.4rem 0; text-decoration: none; }
.dashboard-sidebar a:hover { text-decoration: underline; }
.dashboard-content { flex: 1; min-width: 0; }

.analytics-table { width: 100%; border-collapse: collapse; }
.analytics-table th, .analytics-table td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); }

.footer { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--border); color: var(--subtle); font-size: 0.85rem; }

.landing-hero { text-align: center; padding: 3rem 0; }
.landing-hero h1 { font-size: 2.2rem; }
.landing-hero p { font-size: 1.1rem; color: var(--subtle); max-width: 500px; margin: 0.75rem auto; }
.landing-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; margin: 2rem 0; }

.auth-form { max-width: 400px; margin: 2rem auto; }
.auth-form h1 { text-align: center; }
.auth-form p { text-align: center; color: var(--subtle); margin-bottom: 1.5rem; }

label { display: block; font-weight: 500; margin-top: 0.75rem; }