/* =====================================================
   TIENDA INVENTARIO - SISTEMA DE DISEÑO PREMIUM (DARK MODE)
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    --bg-main: #090d16;
    --bg-surface: rgba(18, 24, 38, 0.75);
    --bg-surface-elevated: rgba(28, 36, 56, 0.85);
    --bg-input: rgba(11, 16, 28, 0.8);
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(99, 102, 241, 0.6);
    
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.25);
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-full: 9999px;

    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.05);
    --shadow-modal: 0 25px 50px -12px rgba(0, 0, 0, 0.75);
    --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.08) 0px, transparent 50%);
    background-attachment: fixed;
}

/* NAVBAR */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 40;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.brand-icon {
    font-size: 1.5rem;
    background: linear-gradient(135deg, #6366f1, #10b981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.badge-server {
    font-size: 0.8rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

/* CONTAINER */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* KPI CARDS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.15);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), transparent);
}

.stat-card.stat-green::before { background: linear-gradient(90deg, var(--success), transparent); }
.stat-card.stat-amber::before { background: linear-gradient(90deg, var(--warning), transparent); }
.stat-card.stat-rose::before { background: linear-gradient(90deg, var(--danger), transparent); }

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.stat-value {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.stat-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

/* ACTION BAR & CONTROLS */
.action-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.input-search {
    flex: 1;
    min-width: 250px;
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: var(--transition);
}

.input-search:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.select-filter {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
}

.select-filter:focus {
    outline: none;
    border-color: var(--primary);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.875rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #fff;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.14);
}

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

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

.btn-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.75rem;
}

/* TABLE STYLING */
.table-container {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    margin-bottom: 2rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.data-table th {
    background: rgba(15, 23, 42, 0.7);
    padding: 1rem 1.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.code-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.06);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    color: #38bdf8;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.price-tag {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--text-primary);
}

.price-tag.sale {
    color: var(--success);
}

/* STATUS BADGES */
.badge-stock {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-stock.available {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-stock.low {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-stock.out {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* MODAL SYSTEM */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1.5rem;
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

.modal-card {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 580px;
    box-shadow: var(--shadow-modal);
    overflow: hidden;
}

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

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

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1;
}

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

.modal-body {
    padding: 1.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group.full-width {
    grid-column: span 2;
}

.form-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-subtle);
    background: rgba(0, 0, 0, 0.2);
}

/* LOGIN CARD */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1.5rem;
}

.login-card {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 420px;
    padding: 2.5rem;
    box-shadow: var(--shadow-modal);
    text-align: center;
}

.login-logo {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.alert-box {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

/* RECENT MOVEMENTS SECTION */
.movements-section {
    margin-top: 2rem;
}

.section-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.movement-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
}

.mov-type-badge {
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.7rem;
}

.mov-in { background: var(--success-bg); color: var(--success); }
.mov-out { background: var(--danger-bg); color: var(--danger); }
.mov-adj { background: var(--warning-bg); color: var(--warning); }