/* =========================================
   SISTEMA DE COBROS - Design System
   ========================================= */

/* ---- Google Font ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---- CSS Variables ---- */
:root {
    /* Colors - Tema Claro */
    --bg-primary: #f5f6fa;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-glass: rgba(0, 0, 0, 0.03);
    --bg-input: #f1f5f9;

    --text-primary: #111111;
    --text-secondary: #555555;
    --text-muted: #888888;

    --accent-primary: #000000;
    --accent-secondary: #222222;
    --accent-gradient: linear-gradient(135deg, #333333, #000000);
    --accent-glow: rgba(0, 0, 0, 0.15);

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);

    --border: #e2e8f0;
    --border-hover: #cbd5e1;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px var(--accent-glow);

    --sidebar-width: 260px;
    --topbar-height: 0px;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ---- Background Pattern ---- */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 0, 0, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 0, 0, 0.02) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(0, 0, 0, 0.03) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
}

/* ---- Layout ---- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal);
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.sidebar-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    box-shadow: var(--shadow-glow);
}

.sidebar-logo .logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-logo .logo-sub {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    padding: 12px 12px 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    margin-bottom: 2px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--accent-gradient);
    border-radius: 0 4px 4px 0;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.nav-item:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(0, 0, 0, 0.08);
    color: var(--accent-secondary);
}

.nav-item.active::before {
    opacity: 1;
}

.nav-item .nav-icon {
    font-size: 1.15rem;
    width: 24px;
    text-align: center;
}

.nav-item .nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: 0.65rem;
    padding: 2px 7px;
    border-radius: 20px;
    font-weight: 600;
}

/* ---- Main Content ---- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 32px;
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* ---- Page Header ---- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-title {
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--text-primary);
}

.page-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ---- Cards ---- */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--border-hover);
}

.card-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.card-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.card-value.success { color: var(--success); }
.card-value.warning { color: var(--warning); }
.card-value.danger { color: var(--danger); }
.card-value.info { color: var(--info); }

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 16px;
}

.card-icon.purple { background: rgba(0, 0, 0, 0.08); color: var(--accent-secondary); }
.card-icon.green { background: var(--success-bg); color: var(--success); }
.card-icon.orange { background: var(--warning-bg); color: var(--warning); }
.card-icon.red { background: var(--danger-bg); color: var(--danger); }
.card-icon.blue { background: var(--info-bg); color: var(--info); }

/* ---- Stats Grid ---- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

/* ---- Grid Layouts ---- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
}

/* ---- Tables ---- */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-primary);
    vertical-align: middle;
}

tbody tr {
    transition: background var(--transition-fast);
}

tbody tr:hover {
    background: var(--bg-glass);
}

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

/* ---- Badges ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.badge.success {
    background: var(--success-bg);
    color: var(--success);
}

.badge.warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge.danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge.info {
    background: var(--info-bg);
    color: var(--info);
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover::after {
    opacity: 1;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-success {
    background: var(--success);
    color: #0a2a1f;
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid rgba(255, 82, 82, 0.3);
}

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

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

.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.78rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.btn-icon:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-icon.danger:hover {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: rgba(255, 82, 82, 0.3);
}

/* ---- Action buttons in table ---- */
.action-btns {
    display: flex;
    gap: 6px;
}

/* ---- Forms ---- */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(255, 255, 255, 0.08);
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238888a8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 36px;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

/* ---- Search Box ---- */
.search-box {
    position: relative;
    max-width: 320px;
}

.search-box .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
    pointer-events: none;
}

.search-box .form-control {
    padding-left: 40px;
}

/* ---- Modal ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 520px;
    max-height: 85vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px 16px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 1.1rem;
}

.modal-close:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

.modal-body {
    padding: 20px 28px;
}

.modal-footer {
    padding: 16px 28px 24px;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    border-top: 1px solid var(--border);
}

/* ---- Toast / Alerts ---- */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-md);
    animation: slideInRight 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
    min-width: 280px;
    max-width: 420px;
}

.toast.success {
    background: linear-gradient(135deg, rgba(0, 210, 160, 0.2), rgba(0, 210, 160, 0.08));
    border: 1px solid rgba(0, 210, 160, 0.3);
    color: var(--success);
}

.toast.error {
    background: linear-gradient(135deg, rgba(255, 82, 82, 0.2), rgba(255, 82, 82, 0.08));
    border: 1px solid rgba(255, 82, 82, 0.3);
    color: var(--danger);
}

.toast.info {
    background: linear-gradient(135deg, rgba(66, 165, 245, 0.2), rgba(66, 165, 245, 0.08));
    border: 1px solid rgba(66, 165, 245, 0.3);
    color: var(--info);
}

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.9rem;
    margin-bottom: 16px;
}

/* ---- Venta Cart ---- */
.cart-items {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 16px 0;
}

.cart-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.cart-item:hover {
    border-color: var(--border-hover);
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.cart-item-price {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.cart-item-qty {
    display: flex;
    align-items: center;
    gap: 10px;
}

.cart-item-qty input {
    width: 60px;
    text-align: center;
    padding: 6px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
}

.cart-item-subtotal {
    font-weight: 700;
    color: var(--accent-secondary);
    min-width: 100px;
    text-align: right;
}

.cart-total {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.2);
    border-radius: var(--radius-md);
    margin-top: 12px;
}

.cart-total-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.cart-total-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent-secondary);
}

/* ---- Detalle Cliente ---- */
.client-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 28px;
}

.client-avatar {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 800;
    color: white;
    box-shadow: var(--shadow-glow);
}

.client-info h2 {
    font-size: 1.4rem;
    font-weight: 700;
}

.client-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ---- Abono Timeline ---- */
.abono-timeline {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.abono-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.abono-item:hover {
    border-color: var(--border-hover);
}

.abono-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--success-bg);
    color: var(--success);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.abono-info {
    flex: 1;
}

.abono-amount {
    font-weight: 700;
    font-size: 1rem;
    color: var(--success);
}

.abono-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ---- Progress Bar (for saldo) ---- */
.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 10px;
    transition: width 0.6s ease;
}

.progress-fill.full {
    background: linear-gradient(135deg, var(--success), #00b894);
}

/* ---- Animations ---- */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(40px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-in {
    animation: fadeInUp 0.4s ease both;
}

.animate-in:nth-child(1) { animation-delay: 0.05s; }
.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.15s; }
.animate-in:nth-child(4) { animation-delay: 0.2s; }

/* ---- Loading Skeleton ---- */
.skeleton {
    background: linear-gradient(90deg, var(--bg-glass) 25%, rgba(255,255,255,0.08) 50%, var(--bg-glass) 75%);
    background-size: 200% 100%;
    animation: pulse 1.5s infinite;
    border-radius: var(--radius-sm);
    height: 20px;
}

/* ---- Responsive ---- */
.mobile-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 150;
    width: 44px;
    height: 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 24px 16px;
        padding-top: 70px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .cart-item {
        flex-wrap: wrap;
        gap: 8px;
    }

    .cart-item-subtotal {
        width: 100%;
        text-align: left;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ---- Utilities ---- */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--text-secondary); }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { gap: 8px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }
.cursor-pointer { cursor: pointer; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Sidebar mobile overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}