/* ── Reset & tokens ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:       #0f1117;
    --surface:  #1a1d27;
    --border:   #2c2f3e;
    --accent:   #6c63ff;
    --accent2:  #ff6584;
    --text:     #e2e4ed;
    --muted:    #7b7f96;
    --success:  #4caf7d;
    --radius:   10px;
    --font:     'Inter', system-ui, sans-serif;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    font-size: 15px;
    line-height: 1.6;
}

/* ── Login ────────────────────────────────────────────────────────────────── */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 3rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-box h1  { font-size: 2rem; margin-bottom: .25rem; }
.login-box .subtitle { color: var(--muted); margin-bottom: 2rem; }

.login-box label {
    display: block;
    text-align: left;
    font-size: .85rem;
    color: var(--muted);
    margin-bottom: .4rem;
}

.login-box input {
    width: 100%;
    padding: .65rem 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 1rem;
    margin-bottom: 1rem;
    outline: none;
}

.login-box input:focus { border-color: var(--accent); }

.login-box button {
    width: 100%;
    padding: .7rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity .2s;
}

.login-box button:hover { opacity: .85; }
.error { color: var(--accent2); font-size: .85rem; margin: -.5rem 0 .8rem; }

/* ── Navbar ───────────────────────────────────────────────────────────────── */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: .9rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand { font-weight: 700; font-size: 1.1rem; text-decoration: none; color: var(--text); }
.navbar ul { list-style: none; display: flex; gap: 1.5rem; }
.navbar a  { color: var(--muted); text-decoration: none; font-size: .9rem; }
.navbar a:hover { color: var(--text); }

/* ── Container ────────────────────────────────────────────────────────────── */
.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.container h2 { font-size: 1.5rem; margin-bottom: 1.25rem; }

/* ── Botones ──────────────────────────────────────────────────────────────── */
.btn-primary {
    display: inline-block;
    padding: .55rem 1.25rem;
    background: var(--accent);
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-size: .9rem;
    margin-bottom: 1.5rem;
    transition: opacity .2s;
}
.btn-primary:hover { opacity: .85; }

/* ── Tabla de reportes ────────────────────────────────────────────────────── */
.reports-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .9rem;
}

.reports-table th,
.reports-table td {
    padding: .7rem 1rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.reports-table th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; }
.reports-table tr:hover td { background: var(--surface); }
.reports-table a { color: var(--accent); text-decoration: none; margin-right: .75rem; }
.reports-table a.muted { color: var(--muted); }

.empty-state { color: var(--muted); padding: 2rem 0; }

/* ── Cards de métricas ────────────────────────────────────────────────────── */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
}

.metric-card .label { font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.metric-card .value { font-size: 1.75rem; font-weight: 700; margin: .25rem 0; }
.metric-card .delta { font-size: .82rem; color: var(--muted); }
.metric-card .delta.up   { color: var(--success); }
.metric-card .delta.down { color: var(--accent2); }

/* ── Secciones del reporte ────────────────────────────────────────────────── */
.report-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
}

.report-section h3 { font-size: 1.15rem; margin-bottom: 1rem; color: var(--accent); }
.narrative { line-height: 1.8; color: var(--text); margin-bottom: 1.5rem; }
.chart-wrap { position: relative; height: 320px; }

/* ── Upload form ──────────────────────────────────────────────────────────── */
.upload-form { max-width: 620px; }
.upload-form .field { margin-bottom: 1.25rem; }
.upload-form label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .35rem; }
.upload-form input[type="month"],
.upload-form input[type="file"] {
    width: 100%;
    padding: .6rem .9rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: .95rem;
}
.upload-form .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.upload-form .hint { font-size: .78rem; color: var(--muted); margin-top: .25rem; }

/* ── Alertas ──────────────────────────────────────────────────────────────── */
.alert-error {
    background: rgba(255, 101, 132, .12);
    border: 1px solid var(--accent2);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    font-size: .9rem;
}
.alert-error ul { margin: .4rem 0 0 1.2rem; }
.alert-error li { margin-bottom: .2rem; }

/* ── Grid de zonas CSV ────────────────────────────────────────────────────── */
.csv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0 2rem;
}

.csv-zone {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.25rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: .6rem;
    transition: border-color .2s;
}

.csv-zone.required-zone {
    border-left: 3px solid var(--accent);
}

.csv-zone.has-file {
    border-color: var(--success);
    background: rgba(76, 175, 125, .05);
}

.csv-zone-header {
    display: flex;
    align-items: center;
    gap: .75rem;
}

.csv-number {
    background: var(--border);
    color: var(--muted);
    font-size: .72rem;
    font-weight: 700;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.csv-zone.required-zone .csv-number {
    background: var(--accent);
    color: #fff;
}

.csv-label {
    font-weight: 600;
    font-size: .92rem;
    display: block;
    line-height: 1.2;
}

.csv-filename {
    font-size: .78rem;
    color: var(--muted);
    font-family: 'SFMono-Regular', Consolas, monospace;
    padding: .2rem .5rem;
    background: var(--bg);
    border-radius: 4px;
    border: 1px solid var(--border);
}

.badge-required,
.badge-optional {
    font-size: .68rem;
    font-weight: 600;
    padding: .1rem .4rem;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.badge-required {
    background: rgba(108, 99, 255, .2);
    color: var(--accent);
}

.badge-optional {
    background: var(--border);
    color: var(--muted);
}

/* ── Zona de drop / label de archivo ─────────────────────────────────────── */
.file-drop-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    border: 2px dashed var(--border);
    border-radius: 7px;
    padding: 1rem;
    cursor: pointer;
    text-align: center;
    transition: border-color .2s, background .2s;
    min-height: 80px;
    margin-top: auto;
}

.file-drop-label:hover {
    border-color: var(--accent);
    background: rgba(108, 99, 255, .05);
}

.csv-zone.has-file .file-drop-label {
    border-color: var(--success);
    background: rgba(76, 175, 125, .06);
}

.file-drop-icon {
    font-size: 1.4rem;
    line-height: 1;
}

.file-drop-text {
    font-size: .8rem;
    color: var(--muted);
    word-break: break-all;
}

.csv-zone.has-file .file-drop-text {
    color: var(--success);
    font-weight: 500;
}

/* Ocultar el input nativo pero mantenerlo accesible */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
}

/* ── Footer del formulario ────────────────────────────────────────────────── */
.form-footer {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: .5rem;
}

.btn-lg { padding: .75rem 2rem; font-size: 1rem; }

.btn-secondary {
    color: var(--muted);
    text-decoration: none;
    font-size: .9rem;
    padding: .55rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: none;
    cursor: pointer;
    transition: color .2s, border-color .2s;
}
.btn-secondary:hover { color: var(--text); border-color: var(--muted); }

.btn-danger {
    padding: .7rem 1.5rem;
    background: var(--accent2);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity .2s;
}
.btn-danger:hover { opacity: .85; }

/* ── Pantalla de confirmación ─────────────────────────────────────────────── */
.confirm-box {
    max-width: 520px;
    margin: 4rem auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent2);
    border-radius: var(--radius);
    padding: 2.5rem;
    text-align: center;
}

.confirm-icon { font-size: 3rem; margin-bottom: 1rem; line-height: 1; }
.confirm-box h2 { font-size: 1.3rem; margin-bottom: 1rem; }
.confirm-box p { color: var(--muted); line-height: 1.7; margin-bottom: .75rem; }
.confirm-note { font-size: .82rem; }
.confirm-note code { background: var(--bg); padding: .1rem .4rem; border-radius: 3px; }

.confirm-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* ── Mensaje de éxito en dashboard ───────────────────────────────────────── */
.alert-success {
    background: rgba(76, 175, 125, .12);
    border: 1px solid var(--success);
    border-radius: var(--radius);
    padding: .85rem 1.25rem;
    margin-bottom: 1.5rem;
    font-size: .9rem;
    color: var(--success);
}

/* ── Campos del form principal ────────────────────────────────────────────── */
.field { margin-bottom: 1.25rem; }
.field label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .35rem; }
.field input[type="month"] {
    padding: .6rem .9rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: .95rem;
    min-width: 200px;
}
.field input[type="month"]:focus { outline: none; border-color: var(--accent); }
.field .hint { font-size: .78rem; color: var(--muted); margin-top: .3rem; }
.required { color: var(--accent2); }