/* =========================================================================
   CGFI — Centro de Gestión de Facturación Inteligente
   Global Design Tokens & Shared Styles
   ========================================================================= */

/* --- Color Palette ------------------------------------------------------- */
:root {
    --primary:        #f26522;
    --primary-hover:  #d9551a;
    --primary-light:  #fef3ec;
    --primary-glow:   rgba(242, 101, 34, 0.15);

    --bg:             #f1f5f9;
    --card-bg:        #ffffff;
    --sidebar-bg:     #1e293b;
    --sidebar-text:   #cbd5e1;
    --sidebar-hover:  #334155;
    --sidebar-active: #f26522;

    --text:           #1e293b;
    --text-muted:     #64748b;
    --text-light:     #94a3b8;

    --border:         #e2e8f0;
    --border-light:   #f1f5f9;

    --shadow-sm:      0 1px 3px rgba(0,0,0,0.06);
    --shadow:         0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg:      0 8px 32px rgba(0,0,0,0.12);

    --success:        #16a34a;
    --success-light:  #f0fdf4;
    --warning:        #f59e0b;
    --warning-light:  #fffbeb;
    --danger:         #dc2626;
    --danger-light:   #fef2f2;
    --danger-hover:   #b91c1c;

    --error-bg:       #fef2f2;
    --error-border:   #fca5a5;
    --error-text:     #991b1b;

    --radius-sm:      6px;
    --radius:         8px;
    --radius-lg:      12px;
    --radius-xl:      16px;

    --font-family:    'Segoe UI', system-ui, -apple-system, sans-serif;
    --transition:     0.15s ease;
}

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

body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

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

/* --- Sidebar ------------------------------------------------------------- */
.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 260px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 1.5rem 1.25rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand h2 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #ffffff;
    line-height: 1.4;
    letter-spacing: 0.01em;
}

.sidebar-brand .company-name {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.sidebar-nav {
    flex: 1;
    padding: 0.75rem 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
    background: var(--sidebar-hover);
    color: #ffffff;
}

.sidebar-nav a.active {
    background: var(--sidebar-hover);
    color: #ffffff;
    border-left-color: var(--sidebar-active);
}

.sidebar-nav a .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    opacity: 0.7;
}

.sidebar-nav a.active .icon,
.sidebar-nav a:hover .icon {
    opacity: 1;
}

.sidebar-divider {
    height: 1px;
    background: rgba(255,255,255,0.08);
    margin: 0.5rem 1.25rem;
}

.sidebar-footer {
    padding: 0.75rem 0 1rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1.25rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
}

.sidebar-footer a:hover {
    background: var(--sidebar-hover);
    color: #ffffff;
}

.sidebar-footer .user-info {
    padding: 0.625rem 1.25rem;
    font-size: 0.75rem;
    color: var(--text-light);
}

.sidebar-footer .user-info strong {
    color: #ffffff;
    font-weight: 600;
}

/* --- Main Content -------------------------------------------------------- */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    padding: 2rem 2.5rem;
}

.page-header {
    margin-bottom: 1.75rem;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.page-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* --- Cards --------------------------------------------------------------- */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.card-body {
    padding: 1.5rem;
}

/* --- Metric Cards -------------------------------------------------------- */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.metric-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    padding: 1.25rem 1.5rem;
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}

.metric-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
}

.metric-card.rechazada::before  { background: var(--danger); }
.metric-card.pendiente::before  { background: var(--warning); }
.metric-card.aceptada::before   { background: var(--success); }

.metric-card .metric-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.metric-card.rechazada .metric-label  { color: var(--danger); }
.metric-card.pendiente .metric-label  { color: var(--warning); }
.metric-card.aceptada .metric-label   { color: var(--success); }

.metric-card .metric-value {
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
    white-space: nowrap;
}

.metric-card .metric-count {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* --- Period Selector ----------------------------------------------------- */
.period-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
}

.period-selector label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
}

.period-selector select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    color: var(--text);
    background: var(--card-bg);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition);
}

.period-selector select:focus {
    border-color: var(--primary);
}

.period-selector .btn-primary {
    padding: 0.5rem 1.25rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
}

.period-selector .btn-primary:hover {
    background: var(--primary-hover);
}

/* --- Dashboard Grid ------------------------------------------------------ */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 1.25rem;
}

.chart-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.chart-card h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1rem;
    text-align: center;
}

/* --- Tables -------------------------------------------------------------- */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

table thead th {
    background: var(--bg);
    padding: 0.625rem 0.75rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

table tbody td {
    padding: 0.625rem 0.75rem;
    border-bottom: 1px solid var(--border-light);
    color: var(--text);
    vertical-align: middle;
}

table tbody tr:hover {
    background: var(--primary-light);
}

table tbody tr:last-child td {
    border-bottom: none;
}

/* --- Status Badges ------------------------------------------------------- */
.badge {
    display: inline-block;
    padding: 0.2rem 0.625rem;
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.badge-pendiente  { background: var(--warning-light); color: #92400e; }
.badge-rechazada  { background: var(--danger-light);  color: var(--danger); }
.badge-aceptada   { background: var(--success-light); color: var(--success); }
.badge-rechazada_manualmente { background: var(--danger-light); color: var(--danger); }
.badge-terminada_manualmente { background: #e2e8f0; color: #475569; }
.badge-vencida    { background: #fef2f2; color: #991b1b; }

/* --- NV Status Badges --- */
.badge-nv-pendiente { background: #f1f5f9; color: #475569; }
.badge-nv-rechazada { background: var(--danger-light); color: var(--danger); }
.badge-nv-aceptada  { background: #e0f2fe; color: #0284c7; }
.badge-nv-pagada    { background: var(--success-light); color: var(--success); }
.badge-nv-parcialmente_pagada { background: #ffedd5; color: #c2410c; }
.badge-nv-terminada_manualmente { background: #e2e8f0; color: #475569; }
.badge-nv-vencida { background: #fef2f2; color: #991b1b; }

/* --- Filters ------------------------------------------------------------- */
.filters-bar {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.filter-group label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.filter-group input,
.filter-group select {
    padding: 0.4375rem 0.625rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.8125rem;
    color: var(--text);
    background: var(--card-bg);
    outline: none;
    transition: border-color var(--transition);
    min-width: 140px;
}

.filter-group input:focus,
.filter-group select:focus {
    border-color: var(--primary);
}

.btn {
    padding: 0.4375rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--bg);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
    color: var(--text);
}

/* -- Pagination / table info ---------------------------------------------- */
.table-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0 0;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* --- Empty State --------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.empty-state .empty-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    opacity: 0.4;
}

.empty-state p {
    font-size: 0.9375rem;
}

/* --- Utility ------------------------------------------------------------- */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mb-1 { margin-bottom: 0.5rem; }

/* --- Modal --------------------------------------------------------------- */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: #ffffff;
    margin: 5% auto;
    padding: 0;
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    width: 90%;
    max-width: 600px;
    animation: modalFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-main);
}

.close-btn {
    color: var(--text-muted);
    font-size: 1.5rem;
    font-weight: bold;
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    transition: color var(--transition);
}

.close-btn:hover,
.close-btn:focus {
    color: var(--danger);
    text-decoration: none;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border-light);
    background-color: var(--bg-subtle, #f8f9fa);
    border-bottom-left-radius: 0.5rem;
    border-bottom-right-radius: 0.5rem;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* --- Responsive ---------------------------------------------------------- */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 220px;
    }
    .main-content {
        margin-left: 220px;
        padding: 1.5rem 1rem;
    }
}