:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-text: #1b1f26;
    --color-muted: #6b7280;
    --color-border: #e2e5ea;
    --color-primary: #3457ff;
    --color-primary-dark: #2942cc;
    --color-danger: #d92d20;
    --color-danger-bg: #fef3f2;
    --color-success: #067647;
    --color-success-bg: #ecfdf3;
    --color-warn: #b54708;
    --color-warn-bg: #fffaeb;
    --radius: 10px;
    --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
}

* { box-sizing: border-box; }

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

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4 { line-height: 1.25; margin-top: 0; }

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

code {
    background: #eef0f3;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: .9em;
}

/* Topbar */
.topbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}
.topbar-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 14px 20px;
}
.brand { font-weight: 700; color: var(--color-text); font-size: 1.1rem; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 16px; flex: 1; }
.nav a { color: var(--color-muted); font-weight: 500; }
.nav a.is-active { color: var(--color-primary); }
.topbar-user { display: flex; align-items: center; gap: 12px; font-size: .9rem; color: var(--color-muted); }
main.container { padding-top: 28px; padding-bottom: 60px; }

/* Cards */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
}

/* Forms */
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .92rem; }
.form-row small { display: block; color: var(--color-muted); margin-top: 4px; font-size: .82rem; }
input[type="text"], input[type="email"], input[type="password"], textarea, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(52, 87, 255, .15);
}
textarea { resize: vertical; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 10px 18px;
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover { background: #f0f1f4; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* Alerts */
.alert { border-radius: 8px; padding: 12px 16px; margin-bottom: 16px; font-size: .92rem; }
.alert-error { background: var(--color-danger-bg); color: var(--color-danger); }
.alert-success { background: var(--color-success-bg); color: var(--color-success); }

/* Badges */
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: .78rem; font-weight: 600; }
.badge-ok { background: var(--color-success-bg); color: var(--color-success); }
.badge-fail { background: var(--color-danger-bg); color: var(--color-danger); }
.badge-warn { background: var(--color-warn-bg); color: var(--color-warn); }

/* Table (wizard requisitos) */
.table { width: 100%; border-collapse: collapse; margin-bottom: 20px; }
.table td { padding: 8px 4px; border-bottom: 1px solid var(--color-border); }
.table td:last-child { text-align: right; }

/* Install / login shell */
.install-body { background: var(--color-bg); }
.install-container { max-width: 560px; padding-top: 60px; }
.app-title { text-align: center; margin-bottom: 24px; font-size: 1.4rem; }

.stepper { display: flex; list-style: none; padding: 0; margin: 0 0 20px; gap: 6px; font-size: .82rem; }
.stepper li {
    flex: 1;
    text-align: center;
    color: var(--color-muted);
    padding-bottom: 8px;
    border-bottom: 3px solid var(--color-border);
}
.stepper li.is-active { color: var(--color-primary); border-color: var(--color-primary); font-weight: 600; }
.stepper li.is-done { color: var(--color-success); border-color: var(--color-success); }
.stepper-num { display: inline-block; }

/* Generar */
.generate-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
}
@media (max-width: 800px) {
    .generate-layout { grid-template-columns: 1fr; }
}

.dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 28px 16px;
    text-align: center;
    color: var(--color-muted);
    cursor: pointer;
    transition: border-color .15s, background .15s;
}
.dropzone.is-dragover { border-color: var(--color-primary); background: rgba(52, 87, 255, .05); }
.dropzone p { margin: 0; }

.reference-previews { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.reference-thumb { position: relative; width: 72px; height: 72px; border-radius: 8px; overflow: hidden; border: 1px solid var(--color-border); }
.reference-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.reference-thumb-remove {
    position: absolute; top: 2px; right: 2px;
    width: 20px; height: 20px; border-radius: 50%;
    background: rgba(0,0,0,.6); color: #fff; border: none;
    cursor: pointer; line-height: 1; font-size: 14px;
}

.generate-status { display: block; margin-top: 12px; color: var(--color-muted); font-size: .9rem; }

.result-image { width: 100%; border-radius: 8px; border: 1px solid var(--color-border); display: block; }
.result-prompt { color: var(--color-muted); font-size: .88rem; }
.variant-actions { display: flex; gap: 10px; margin: 16px 0; }
.variant-results { display: flex; flex-wrap: wrap; gap: 16px; }
.variant-item { width: 160px; }
.variant-item img { width: 100%; border-radius: 8px; border: 1px solid var(--color-border); display: block; }
.variant-item h4 { margin: 0 0 6px; font-size: .85rem; color: var(--color-muted); }

/* Historial / acordeón */
.accordion-day {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
}
.accordion-day summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    cursor: pointer;
    font-weight: 600;
    list-style: none;
}
.accordion-day summary::-webkit-details-marker { display: none; }
.accordion-count { color: var(--color-muted); font-weight: 400; font-size: .85rem; }
.accordion-body { padding: 0 20px 16px; display: flex; flex-direction: column; gap: 16px; }

.history-item { display: flex; gap: 14px; padding-top: 16px; border-top: 1px solid var(--color-border); }
.history-item:first-child { border-top: none; padding-top: 0; }
.history-thumb { width: 140px; height: 74px; object-fit: cover; border-radius: 6px; border: 1px solid var(--color-border); flex-shrink: 0; }
.history-thumb-failed {
    display: flex; align-items: center; justify-content: center;
    background: var(--color-danger-bg); color: var(--color-danger); font-size: .8rem; text-align: center;
}
.history-meta { min-width: 0; }
.history-prompt { margin: 0 0 6px; }
.history-time { margin: 0; color: var(--color-muted); font-size: .82rem; display: flex; align-items: center; gap: 8px; }
.history-variants { display: flex; gap: 8px; margin-top: 10px; }
.history-variant-thumb { display: block; text-align: center; font-size: .72rem; color: var(--color-muted); }
.history-variant-thumb img { width: 46px; height: 60px; object-fit: cover; border-radius: 4px; border: 1px solid var(--color-border); display: block; margin-bottom: 2px; }

.pagination { display: flex; justify-content: center; align-items: center; gap: 16px; margin-top: 24px; font-size: .9rem; }

.empty-state { color: var(--color-muted); }

/* Ajustes */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
@media (max-width: 800px) {
    .settings-grid { grid-template-columns: 1fr; }
}