/* =========================================================
   Glided Grounding Page – clean, modern, readable
   ========================================================= */

/* --------- CSS Reset (lightweight) --------- */
*,
*::before,
*::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    line-height: 1.6;
    color: #0f172a;             /* slate-900 */
    background: #f8fafc;        /* slate-50 */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

:root{
    --container: 1040px;

    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-muted: #475569;         /* slate-600 */
    --color-muted-2: #64748b;       /* slate-500 */

    --color-border: rgba(15, 23, 42, 0.10);
    --color-border-strong: rgba(15, 23, 42, 0.16);

    --color-primary: #0f172a;       /* neutral primary (safe) */
    --color-accent: #2563eb;        /* blue-600 */

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);

    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 22px;

    --pad-1: 10px;
    --pad-2: 14px;
    --pad-3: 18px;
    --pad-4: 26px;

    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* --------- Layout --------- */
.container{
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 18px;
}

main.container{
    padding-top: 26px;
    padding-bottom: 54px;
}

/* --------- Header --------- */
.site-header{
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(248, 250, 252, 0.86);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner{
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    gap: 16px;
}

.logo-area{
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 220px;
}

.logo{
    width: 38px;
    height: 38px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.project-name{
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.main-nav{
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.main-nav a{
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--color-muted);
    text-decoration: none;
    border: 1px solid transparent;
}

.main-nav a:hover{
    color: var(--color-text);
    background: var(--color-surface);
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-subbar{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 0 12px;
}

.badge{
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-muted);
    font-size: 13px;
    box-shadow: var(--shadow-sm);
}

.language-switch{
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--color-muted);
}

.language-switch a{
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.language-switch a:hover{
    border-color: var(--color-border-strong);
    color: var(--color-text);
}

/* --------- Typography --------- */
h1{
    margin: 8px 0 10px;
    font-size: clamp(28px, 3vw, 40px);
    line-height: 1.15;
    letter-spacing: -0.03em;
}

h3{
    margin: 26px 0 10px;
    font-size: 18px;
    letter-spacing: -0.01em;
}

p{
    margin: 10px 0;
    color: var(--color-text);
}

.lead-definition{
    margin-top: 14px;
    padding: 16px 18px;
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, #ffffff, #ffffff);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    font-size: 16px;
}

.meta-block{
    color: var(--color-muted);
    font-size: 14px;
}

.meta-spaced{
    margin-top: 14px;
}

/* --------- Notice box --------- */
.human-notice{
    margin-top: 14px;
    padding: 16px 18px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(37, 99, 235, 0.18);
    background: rgba(37, 99, 235, 0.06);
    color: var(--color-text);
}

.human-notice a{
    color: var(--color-accent);
    font-weight: 600;
}

/* --------- Example box / Card --------- */
.example-box{
    margin-top: 18px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--pad-4);
}

.example-meta{
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.example-meta span{
    font-family: var(--mono);
    font-size: 12px;
    color: var(--color-muted-2);
    padding: 6px 10px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: #f9fafb;
}

/* --------- Data grid (dl) --------- */
.data-grid{
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 10px 16px;
    margin: 12px 0 4px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: #fbfdff;
}

.data-grid dt{
    margin: 0;
    font-weight: 650;
    color: var(--color-text);
}

.data-grid dd{
    margin: 0;
    color: var(--color-muted);
}

.data-grid a{
    color: var(--color-accent);
    font-weight: 600;
}

/* --------- Lists --------- */
ul{
    margin: 10px 0 0;
    padding-left: 18px;
    color: var(--color-muted);
}

li{ margin: 6px 0; }

.distinction-list{
    list-style: none;
    padding-left: 0;
    margin: 12px 0 0;
}

.distinction-list li{
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: #fff;
}

.distinction-list li::before{
    content: "—";
    color: var(--color-muted-2);
    margin-top: 1px;
}

/* --------- Note --------- */
.example-note{
    margin-top: 18px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px dashed var(--color-border-strong);
    background: #f8fafc;
    color: var(--color-muted);
}

/* --------- Compliance badge --------- */
.compliance-badge{
    margin-top: 22px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    color: var(--color-muted);
}

.compliance-badge img{
    width: 30px;
    height: 30px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: #fff;
}

.compliance-badge .check{
    margin-left: auto;
    width: 30px;
    height: 30px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(16, 185, 129, 0.25);
    background: rgba(16, 185, 129, 0.10);
    color: #047857;
    font-weight: 800;
}

/* --------- Footer --------- */
.site-footer{
    border-top: 1px solid var(--color-border);
    background: #f1f5f9;
}

.site-footer .container{
    padding-top: 22px;
    padding-bottom: 28px;
}

.footer-nav{
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 14px;
}

.footer-nav a{
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.8);
    color: var(--color-muted);
    box-shadow: var(--shadow-sm);
}

.footer-nav a:hover{
    color: var(--color-text);
    border-color: var(--color-border-strong);
    background: var(--color-surface);
}

.footer-meta{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    color: var(--color-muted-2);
    font-size: 13px;
}

.footer-badge{
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

/* --------- Small screens --------- */
@media (max-width: 820px){
    .header-inner{
        flex-direction: column;
        align-items: stretch;
    }

    .logo-area{
        justify-content: space-between;
        width: 100%;
    }

    .main-nav{
        justify-content: flex-start;
    }

    .data-grid{
        grid-template-columns: 1fr;
    }

    .data-grid dt{
        color: var(--color-text);
    }

    .data-grid dd{
        padding-bottom: 8px;
        border-bottom: 1px solid var(--color-border);
    }

    .data-grid dd:last-of-type{
        border-bottom: none;
        padding-bottom: 0;
    }
}

/* --------- Dark mode (optional but nice) --------- */
@media (prefers-color-scheme: dark){
    body{
        background: #0b1220;
        color: #e5e7eb;
    }

    :root{
        --color-surface: rgba(17, 24, 39, 0.85);
        --color-text: #e5e7eb;
        --color-muted: #a1a1aa;
        --color-muted-2: #94a3b8;
        --color-border: rgba(148, 163, 184, 0.18);
        --color-border-strong: rgba(148, 163, 184, 0.28);
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.35);
        --shadow-md: 0 18px 60px rgba(0,0,0,0.35);
    }

    .site-header{
        background: rgba(11, 18, 32, 0.72);
        border-bottom: 1px solid var(--color-border);
    }

    .main-nav a:hover,
    .language-switch a:hover{
        background: rgba(17, 24, 39, 0.95);
    }

    .lead-definition{
        background: rgba(17, 24, 39, 0.85);
    }

    .human-notice{
        border-color: rgba(37, 99, 235, 0.25);
        background: rgba(37, 99, 235, 0.10);
    }

    .example-meta span{
        background: rgba(17, 24, 39, 0.65);
    }

    .data-grid{
        background: rgba(17, 24, 39, 0.55);
    }

    .distinction-list li{
        background: rgba(17, 24, 39, 0.65);
    }

    .example-note{
        background: rgba(17, 24, 39, 0.40);
    }

    .site-footer{
        background: rgba(15, 23, 42, 0.65);
    }

    .footer-nav a{
        background: rgba(17, 24, 39, 0.65);
    }
}