/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --warning-bg: #fef3c7;
    --warning-border: #f59e0b;
    --success: #16a34a;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --nav-height: 64px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.5;
}

/* ===== LOGIN ===== */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.login-container {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px 32px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    text-align: center;
}

.login-logo { font-size: 48px; margin-bottom: 12px; }
.login-title { font-size: 24px; font-weight: 700; margin-bottom: 4px; }
.login-subtitle { color: var(--text-muted); font-size: 13px; margin-bottom: 28px; }

/* ===== FORMS ===== */
.form-group { text-align: left; margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.05em; }
.form-group input,
.form-group select,
select { width: 100%; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 10px; font-size: 15px; color: var(--text); background: #fff; transition: border-color 0.2s; }
.form-group input:focus,
select:focus { outline: none; border-color: var(--primary); }

/* ===== BUTTONS ===== */
.btn-primary {
    display: block;
    width: 100%;
    padding: 13px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-primary:hover { background: var(--primary-dark); }

/* ===== ALERTS ===== */
.alert-error {
    background: #fee2e2;
    color: var(--danger);
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 16px;
    font-size: 14px;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: #fff;
    border-top: 1px solid var(--border);
    display: flex;
    z-index: 100;
    box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-muted);
    gap: 2px;
    transition: color 0.2s;
}
.nav-item.active { color: var(--primary); }
.nav-icon { font-size: 22px; line-height: 1; }
.nav-label { font-size: 11px; font-weight: 500; }

/* ===== MAIN CONTENT ===== */
.main-content {
    padding: 16px 16px calc(var(--nav-height) + 16px);
    max-width: 600px;
    margin: 0 auto;
}

.page-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 20px 0 8px;
}

/* ===== SEARCH ===== */
.search-form { margin-bottom: 12px; }
.search-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 80px;
    gap: 8px;
    margin-bottom: 10px;
}
.search-grid .form-group { margin-bottom: 0; }

.filter-form { margin-bottom: 16px; }
.filter-row { display: flex; gap: 8px; align-items: flex-end; }
.filter-row select { flex: 1; }
.filter-row .btn-primary { width: auto; padding: 12px 16px; white-space: nowrap; }

.result-count { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }

/* ===== CARDS ===== */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 10px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    border: 1px solid var(--border);
}
.card-danger { border-color: #fca5a5; background: #fff5f5; }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px 8px;
    border-bottom: 1px solid var(--border);
}
.card-title { font-weight: 600; font-size: 15px; }

.badge {
    font-size: 11px;
    background: #e0e7ff;
    color: #3730a3;
    padding: 2px 8px;
    border-radius: 20px;
    font-weight: 500;
}

.card-body { padding: 10px 14px; }

.card-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 4px 0;
    gap: 8px;
    font-size: 14px;
}
.card-row span:first-child { color: var(--text-muted); flex-shrink: 0; }
.card-row span:last-child { text-align: right; }

.card-footer {
    display: flex;
    gap: 12px;
    padding-top: 8px;
    margin-top: 4px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.fecha { }
.cobrado { font-weight: 700; color: var(--success); }
.forma-pago { }

.card-compact .card-body { padding: 8px 14px; }

/* ===== STOCK BADGES ===== */
.stock-badge {
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
}
.stock-ok { background: #dcfce7; color: #166534; }
.stock-low { background: #fee2e2; color: #991b1b; }

/* ===== SUMMARY CARDS ===== */
.summary-cards {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}
.summary-card {
    flex: 1;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 14px 10px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.summary-card.highlight { background: var(--primary); color: #fff; border-color: var(--primary); }
.summary-card.highlight .summary-label { color: rgba(255,255,255,0.8); }
.summary-label { font-size: 11px; font-weight: 600; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.05em; margin-bottom: 4px; }
.summary-value { font-size: 18px; font-weight: 700; }

/* ===== MISC ===== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 15px;
}

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

/* ===== DESKTOP ===== */
@media (min-width: 600px) {
    .main-content { padding-top: 24px; }
    .summary-value { font-size: 22px; }
}