:root {
    --bg: #f3f5f4;
    --surface: #ffffff;
    --surface-2: #f7f9f8;
    --border: #e1e6e3;
    --text: #17201b;
    --muted: #66726b;
    --accent: #128c4a;
    --accent-ink: #ffffff;
    --accent-soft: #e3f4ea;
    --warn: #b26a00;
    --warn-soft: #fff3df;
    --danger: #c0392b;
    --danger-soft: #fdecea;
    --info: #2563a8;
    --info-soft: #e8f0fb;
    --chat-bg: #efeae2;
    --bubble: #d9fdd3;
    --radius: 12px;
    --shadow: 0 1px 2px rgba(16, 24, 20, .06), 0 2px 8px rgba(16, 24, 20, .04);
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f1412;
        --surface: #171d1a;
        --surface-2: #1d2421;
        --border: #2a3430;
        --text: #e6ece9;
        --muted: #93a19a;
        --accent: #25b866;
        --accent-ink: #06200f;
        --accent-soft: #163626;
        --warn: #f0a540;
        --warn-soft: #3a2c14;
        --danger: #ef6b5e;
        --danger-soft: #3d1d1a;
        --info: #6aa5ea;
        --info-soft: #172a40;
        --chat-bg: #0b141a;
        --bubble: #005c4b;
        --shadow: none;
        color-scheme: dark;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

/* ---------- header ---------- */
.topbar {
    position: sticky; top: 0; z-index: 10;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.topbar-inner {
    max-width: 1180px; margin: 0 auto; padding: 10px 16px;
    display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; }
.brand-mark {
    width: 32px; height: 32px; border-radius: 9px; background: var(--accent); color: var(--accent-ink);
    display: grid; place-items: center;
}
.tabs { display: flex; gap: 4px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
@media (max-width: 720px) { .tabs { order: 3; flex-basis: 100%; } .brand { flex: 1; } }
.tab {
    border: 0; background: none; padding: 8px 12px; border-radius: 8px; cursor: pointer;
    color: var(--muted); font-weight: 550; white-space: nowrap;
}
.tab:hover { background: var(--surface-2); color: var(--text); }
.tab.active { background: var(--accent-soft); color: var(--accent); }

/* ---------- layout ---------- */
main { max-width: 1180px; margin: 0 auto; padding: 20px 16px 60px; }
.view { display: none; }
.view.active { display: block; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-main { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); }
@media (max-width: 860px) { .grid-2, .grid-main { grid-template-columns: 1fr; } }

.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 18px; box-shadow: var(--shadow); min-width: 0;
}
.card h2 { font-size: 15px; margin: 0 0 14px; font-weight: 650; display: flex; align-items: center; gap: 8px; }
.card h2 .spacer { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.stack > * + * { margin-top: 12px; }

/* ---------- buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    border: 1px solid var(--border); background: var(--surface); padding: 8px 14px; border-radius: 9px;
    cursor: pointer; font-weight: 550; text-decoration: none; color: var(--text); line-height: 1.3;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); }
.btn.big { padding: 11px 20px; font-size: 16px; }
.btn.sm { padding: 4px 9px; font-size: 13px; }
.btn.ghost { border-color: transparent; background: none; }

/* ---------- forms ---------- */
label.field { display: block; }
label.field > span { display: block; font-size: 13px; font-weight: 550; margin-bottom: 4px; }
input[type=text], input[type=number], input[type=password], input[type=search], input[type=tel], select, textarea {
    width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
textarea { resize: vertical; min-height: 220px; line-height: 1.45; }
.hint { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.days { display: flex; gap: 6px; flex-wrap: wrap; }
.days label {
    border: 1px solid var(--border); border-radius: 8px; padding: 5px 10px; cursor: pointer; user-select: none;
}
.days input { display: none; }
.days label:has(input:checked) { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.check { display: flex; gap: 8px; align-items: flex-start; cursor: pointer; }
.check input { margin-top: 4px; accent-color: var(--accent); }

/* ---------- status ---------- */
.pill {
    display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px;
    font-size: 13px; font-weight: 600; background: var(--surface-2); color: var(--muted); white-space: nowrap;
}
.pill::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.pill.ok { background: var(--accent-soft); color: var(--accent); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.err { background: var(--danger-soft); color: var(--danger); }
.pill.info { background: var(--info-soft); color: var(--info); }

.stats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-bottom: 16px; }
@media (max-width: 600px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { background: var(--surface-2); border-radius: 10px; padding: 10px 12px; }
.stat b { display: block; font-size: 22px; font-variant-numeric: tabular-nums; line-height: 1.2; }
.stat span { font-size: 12.5px; color: var(--muted); }
.stat.sent b { color: var(--accent); }
.stat.failed b { color: var(--danger); }

.progress { height: 10px; background: var(--surface-2); border-radius: 99px; overflow: hidden; display: flex; }
.progress > div { height: 100%; transition: width .4s; }
.progress .p-sent { background: var(--accent); }
.progress .p-nowa { background: var(--muted); opacity: .5; }
.progress .p-failed { background: var(--danger); }

.phase {
    display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 10px;
    background: var(--surface-2); margin: 16px 0;
}
.phase .icon { font-size: 22px; }
.phase b { display: block; }
.countdown { font-variant-numeric: tabular-nums; font-weight: 650; margin-left: auto; font-size: 18px; }

/* ---------- QR ---------- */
.qr-box { display: grid; place-items: center; gap: 10px; padding: 8px 0; text-align: center; }
.qr-box img { width: 240px; height: 240px; border-radius: 10px; background: #fff; padding: 8px; }
.qr-steps { text-align: left; font-size: 13.5px; color: var(--muted); padding-left: 18px; margin: 0; }
.pair-form { margin-top: 14px; }
.pair-sep { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; margin-bottom: 12px; }
.pair-sep::before, .pair-sep::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.pair-code {
    font: 700 34px/1.2 ui-monospace, "Cascadia Mono", Consolas, monospace; letter-spacing: 4px;
    background: var(--accent-soft); color: var(--accent); padding: 12px 18px; border-radius: 12px; user-select: all;
}

/* ---------- log ---------- */
.log {
    font: 12.5px/1.55 ui-monospace, "Cascadia Mono", Consolas, monospace;
    max-height: 380px; overflow: auto; background: var(--surface-2); border-radius: 10px; padding: 10px 12px;
}
.log div { white-space: pre-wrap; word-break: break-word; }
.log time { color: var(--muted); margin-right: 8px; }
.log .ok { color: var(--accent); }
.log .error { color: var(--danger); }
.log .warn { color: var(--warn); }
.log .muted { color: var(--muted); }

/* ---------- message editor ---------- */
.toolbar { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 6px; }
.dropzone {
    border: 2px dashed var(--border); border-radius: 10px; padding: 18px; text-align: center; cursor: pointer;
    color: var(--muted); transition: border-color .15s, background .15s;
}
.dropzone.drag, .dropzone:hover { border-color: var(--accent); background: var(--accent-soft); }
.img-preview { display: flex; gap: 12px; align-items: center; }
.img-preview img { width: 84px; height: 84px; object-fit: cover; border-radius: 8px; }

.phone {
    background: var(--chat-bg); border-radius: 14px; padding: 18px 14px; min-height: 300px;
    background-image: radial-gradient(rgba(0,0,0,.035) 1px, transparent 1px); background-size: 14px 14px;
}
.bubble {
    background: var(--bubble); border-radius: 10px 10px 2px 10px; padding: 4px; max-width: 330px; margin-left: auto;
    box-shadow: 0 1px .5px rgba(0,0,0,.13); color: var(--text);
}
@media (prefers-color-scheme: dark) { .bubble { color: #e9edef; } }
.bubble img { display: block; width: 100%; border-radius: 8px; }
.bubble .txt { padding: 6px 8px 2px; white-space: pre-wrap; word-break: break-word; font-size: 14.2px; }
.bubble .meta { text-align: right; font-size: 11px; opacity: .6; padding: 0 8px 4px; }
.save-state { font-size: 13px; color: var(--muted); }

/* ---------- table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-size: 12.5px; color: var(--muted); font-weight: 600; background: var(--surface-2); }
tr:last-child td { border-bottom: 0; }
td.err { color: var(--danger); font-size: 12.5px; white-space: normal; max-width: 280px; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.chip {
    border: 1px solid var(--border); border-radius: 99px; padding: 4px 12px; background: var(--surface);
    cursor: pointer; font-size: 13px;
}
.chip.active { background: var(--text); color: var(--surface); border-color: var(--text); }
.pager { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; gap: 10px; flex-wrap: wrap; }

/* ---------- modal ---------- */
dialog {
    border: 0; border-radius: 14px; padding: 0; width: min(720px, calc(100vw - 32px));
    background: var(--surface); color: var(--text); box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
dialog::backdrop { background: rgba(0,0,0,.45); }
.modal-body { padding: 20px; }
.modal-body h3 { margin: 0 0 4px; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.result-line { display: flex; gap: 14px; flex-wrap: wrap; font-size: 14px; margin: 12px 0; }
.result-line b { font-variant-numeric: tabular-nums; }

/* ---------- toast ---------- */
#toasts { position: fixed; bottom: 16px; right: 16px; left: 16px; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; z-index: 100; pointer-events: none; }
.toast {
    background: var(--text); color: var(--surface); padding: 10px 14px; border-radius: 10px; max-width: 420px;
    box-shadow: 0 6px 20px rgba(0,0,0,.2); animation: pop .2s ease-out; pointer-events: auto;
}
.toast.err { background: var(--danger); color: #fff; }
@keyframes pop { from { transform: translateY(8px); opacity: 0; } }

/* ---------- login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 360px; }
.login-card .brand { justify-content: center; margin-bottom: 18px; font-size: 18px; }
.error-text { color: var(--danger); font-size: 14px; min-height: 20px; }

/* ======================= mejoras de usabilidad ======================= */

.tab { display: inline-flex; align-items: center; gap: 6px; }
.tab-ico { font-size: 15px; line-height: 1; }

/* ayuda (?) */
.help { position: relative; font-weight: 400; }
.help > summary {
    list-style: none; cursor: pointer; width: 22px; height: 22px; border-radius: 50%;
    display: grid; place-items: center; font-size: 13px; font-weight: 700;
    background: var(--surface-2); color: var(--muted); border: 1px solid var(--border);
}
.help > summary::-webkit-details-marker { display: none; }
.help[open] > summary { background: var(--info-soft); color: var(--info); border-color: var(--info); }
.help > div {
    position: absolute; right: 0; top: 30px; z-index: 30; width: min(320px, 80vw);
    background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,.18); font-size: 13.5px; line-height: 1.5; color: var(--text);
}

/* guía de pasos */
.guide { margin-bottom: 16px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.step {
    display: flex; align-items: center; gap: 14px; padding: 12px 14px; border-radius: 10px;
    background: var(--surface-2); border: 1px solid transparent; transition: border-color .2s, background .2s;
}
.step-num {
    width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; flex: none;
    font-weight: 700; background: var(--surface); border: 2px solid var(--border); color: var(--muted);
}
.step-body { flex: 1; min-width: 0; }
.step-body b { display: block; }
.step-desc { display: block; font-size: 13px; color: var(--muted); }
.step.current { border-color: var(--warn); background: var(--warn-soft); }
.step.current .step-num { border-color: var(--warn); color: var(--warn); }
.step.done .step-num { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-size: 0; }
.step.done .step-num::after { content: "✓"; font-size: 16px; }
.step.done .btn { opacity: .7; }
@media (max-width: 520px) { .step { flex-wrap: wrap; } .step .btn { margin-left: 44px; } }

.flash { animation: flash 1.4s ease-out; }
@keyframes flash { 0%, 40% { box-shadow: 0 0 0 3px var(--warn); } 100% { box-shadow: var(--shadow); } }

/* registro plegable */
.log-card > summary { list-style: none; cursor: pointer; }
.log-card > summary::-webkit-details-marker { display: none; }
.log-card > summary h2 { margin: 0; }
.log-card[open] > summary h2 { margin-bottom: 12px; }

/* mensaje */
.tips { margin-top: 8px; display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.tips b { color: var(--text); font-weight: 600; }

/* perfiles de ritmo */
.profiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.profile {
    display: flex; flex-direction: column; gap: 4px; padding: 14px; border-radius: 12px; cursor: pointer;
    border: 2px solid var(--border); background: var(--surface); transition: border-color .15s, background .15s;
}
.profile:hover { border-color: var(--muted); }
.profile input { display: none; }
.profile:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.p-title { font-weight: 650; }
.p-desc { font-size: 13px; color: var(--muted); }
.p-meta { font-size: 12.5px; font-weight: 600; color: var(--accent); margin-top: 2px; }
.badge {
    font-style: normal; font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 99px;
    background: var(--accent); color: var(--accent-ink); margin-left: 4px; vertical-align: 1px;
}
.warn-box { padding: 10px 12px; border-radius: 10px; background: var(--warn-soft); color: var(--warn); font-size: 13.5px; }
.hours { gap: 10px; }
.hours select { padding: 7px 10px; }
.estimate { padding: 12px 14px; border-radius: 10px; background: var(--info-soft); font-size: 14px; margin-top: 16px; }
.advanced { margin-top: 18px; border-top: 1px solid var(--border); padding-top: 12px; }
.advanced > summary { cursor: pointer; color: var(--muted); font-size: 14px; font-weight: 550; }

/* importación */
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 3px; vertical-align: 0; margin-right: 2px; }
.dot-green { background: var(--accent-soft); outline: 1px solid var(--accent); }
.dot-blue { background: var(--info-soft); outline: 1px solid var(--info); }
td.empty { text-align: center; padding: 34px 12px !important; font-size: 15px; }

/* confirmación al iniciar */
.sd-grid { display: grid; grid-template-columns: 1fr 260px; gap: 18px; align-items: start; }
@media (max-width: 640px) { .sd-grid { grid-template-columns: 1fr; } }
.sd-row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.sd-row span { color: var(--muted); }
.sd-row b { text-align: right; }
.small-phone { min-height: 0; padding: 12px 10px; max-height: 360px; overflow: auto; }
.small-phone .bubble { max-width: 100%; }
dialog[open] { display: flex; flex-direction: column; max-height: calc(100dvh - 32px); }
dialog .modal-body { overflow: auto; }
dialog .modal-foot { flex: none; }
.small-phone { max-height: 240px; }
[hidden] { display: none !important; }