/* ZeroIPTunel — paleta sobria, sin colores saturados. */

:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --surface-2: #f0f2f5;
    --border: #dfe3e8;
    --border-strong: #c8cdd4;
    --text: #1f2429;
    --text-muted: #6b7480;
    --accent: #3f6b93;
    --accent-soft: #eaf0f6;
    --ok: #2f7a55;
    --ok-soft: #e8f2ec;
    --warn: #8a6d2f;
    --warn-soft: #f6f0e2;
    --danger: #9b4a45;
    --danger-soft: #f6eae9;
    --radius: 8px;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.04);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #16191d;
        --surface: #1e2227;
        --surface-2: #23282e;
        --border: #2e343b;
        --border-strong: #3d454e;
        --text: #dde1e6;
        --text-muted: #8d959f;
        --accent: #7ba3c8;
        --accent-soft: #22303c;
        --ok: #6fb391;
        --ok-soft: #1f2c26;
        --warn: #c2a468;
        --warn-soft: #2b271d;
        --danger: #cc8a85;
        --danger-soft: #2d2120;
        --shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    background: var(--bg);
    color: var(--text);
}

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

code, pre, .mono {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 13px;
}

/* --- Layout ------------------------------------------------------------ */

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 220px;
    flex-shrink: 0;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 20px 14px;
    display: flex;
    flex-direction: column;
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 6px;
    padding: 0 8px 20px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.01em;
}
.brand span { color: var(--text-muted); font-weight: 400; font-size: 11px; }

.nav { display: flex; flex-direction: column; gap: 2px; }
.nav a {
    padding: 8px 10px;
    border-radius: 6px;
    color: var(--text);
    font-weight: 500;
}
.nav a:hover { background: var(--surface-2); text-decoration: none; }
.nav a.active { background: var(--accent-soft); color: var(--accent); }
.nav .num { float: right; color: var(--text-muted); font-weight: 400; }

.sidebar-foot {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-muted);
}

.content { flex: 1; min-width: 0; padding: 28px 32px 64px; }

.page-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 20px;
}
.page-head h1 { margin: 0 0 4px; font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.page-head p { margin: 0; color: var(--text-muted); max-width: 62ch; }

/* --- Tarjetas ---------------------------------------------------------- */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 18px;
}
.card > h2 {
    margin: 0;
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}
.card-body { padding: 16px; }

.grid { display: grid; gap: 18px; }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 14px;
}
.stat .k { font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
.stat .v { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; }

/* --- Tablas ------------------------------------------------------------ */

table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 16px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    font-weight: 600;
    background: var(--surface-2);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
td.actions { text-align: right; white-space: nowrap; }
.table-wrap { overflow-x: auto; }

.empty { padding: 28px 16px; text-align: center; color: var(--text-muted); }

/* --- Etiquetas --------------------------------------------------------- */

.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.02em;
    border: 1px solid transparent;
}
.tag.ok { background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }
.tag.off { background: var(--surface-2); color: var(--text-muted); border-color: var(--border-strong); }
.tag.warn { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }
.tag.danger { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }
.tag.info { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

/* --- Formularios ------------------------------------------------------- */

label { display: block; font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; }

input[type="text"], input[type="password"], input[type="number"], select, textarea {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { resize: vertical; min-height: 90px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }

.field { margin-bottom: 12px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > .field { flex: 1; min-width: 130px; }
.hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; font-weight: 400; }

.btn {
    display: inline-block;
    padding: 7px 14px;
    border-radius: 6px;
    border: 1px solid var(--border-strong);
    background: var(--surface);
    color: var(--text);
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(0.94); }
.btn.subtle { border-color: transparent; background: transparent; color: var(--text-muted); padding: 4px 8px; }
.btn.subtle:hover { background: var(--surface-2); color: var(--text); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); }
.btn.small { padding: 4px 9px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

form.inline { display: inline; }
form.inline-row { display: flex; gap: 8px; align-items: flex-end; flex-wrap: wrap; }

/* --- Avisos ------------------------------------------------------------ */

.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    border: 1px solid;
    margin-bottom: 16px;
    font-size: 13px;
}
.alert.ok { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.alert.err { background: var(--danger-soft); border-color: var(--danger); color: var(--danger); }
.alert.warn { background: var(--warn-soft); border-color: var(--warn); color: var(--warn); }

pre.block {
    margin: 0;
    padding: 12px 14px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow-x: auto;
    white-space: pre;
    color: var(--text);
}

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; }
.kv dt { color: var(--text-muted); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.kv dd { margin: 0; }

details summary { cursor: pointer; color: var(--text-muted); font-size: 13px; }
details[open] summary { margin-bottom: 10px; }

.muted { color: var(--text-muted); }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.mt { margin-top: 16px; }

/* --- Pasos ------------------------------------------------------------- */

.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; }
.steps li {
    counter-increment: step;
    position: relative;
    padding: 0 0 14px 30px;
    border-left: 1px solid var(--border);
    margin-left: 10px;
}
.steps li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps li::before {
    content: counter(step);
    position: absolute;
    left: -10px;
    top: 0;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    display: flex; align-items: center; justify-content: center;
}

@media (max-width: 820px) {
    .layout { flex-direction: column; }
    .sidebar { width: auto; border-right: none; border-bottom: 1px solid var(--border); }
    .nav { flex-direction: row; flex-wrap: wrap; }
    .content { padding: 20px 16px 48px; }
    .sidebar-foot { display: none; }
}

/* --- Login ------------------------------------------------------------- */

.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { width: 100%; max-width: 340px; }
.login-card .brand { justify-content: center; padding-bottom: 24px; }