/* CSS Reset and Variables */
:root {
    --color-green: #2ecc71;
    --color-dark-green: #27ae60;
    --color-blue: #3498db;
    --color-dark-blue: #2980b9;
    --color-bg-dark: #1e272e;
    --color-card-dark: #2f3640;
    --color-text-light: #f5f6fa;
    --color-text-dim: #dcdde1;
    --color-danger: #e74c3c;
    --color-warning: #f39c12;
    --color-border: #4a5462;
    
    font-family: 'Inter', sans-serif;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg-dark); /* Por default SPA es oscura/industrial */
    color: var(--color-text-light);
    overflow-x: hidden;
}

/* Pantalla de Login Blanca como solicitado */
.login-container {
    background-color: #ffffff;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #333;
}
.login-card {
    background: #f8f9fa;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0px 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    width: 100%;
    max-width: 400px;
}
.login-card h1 {
    color: var(--color-blue);
    margin-bottom: 0.5rem;
}

/* Base Inputs y Botones */
.input-field {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 16px;
    box-sizing: border-box;
    font-family: inherit;
}
.btn-action {
    background-color: var(--color-blue);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: 0.3s;
}
.btn-action:hover {
    background-color: var(--color-dark-blue);
}
.btn-out { background-color: var(--color-green); }
.btn-out:hover { background-color: var(--color-dark-green); }

.w-100 { width: 100%; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

/* SPA Layout */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #ffffff;
    color: #333;
    padding: 15px 30px;
    border-bottom: 2px solid var(--color-blue);
}
.logo-container img {
    height: 70px;
    object-fit: contain;
}
.header-title {
    text-align: center;
}
.header-title h1 {
    margin: 0;
    font-size: 24px;
    color: #333;
}
.header-title p {
    margin: 5px 0 0;
    font-size: 12px;
    color: #666;
}

.app-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding: 15px;
    background-color: #242b32;
    overflow-x: auto;
}
.app-nav button {
    background: transparent;
    color: var(--color-text-dim);
    border: 1px solid var(--color-border);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s;
}
.app-nav button:hover, .app-nav button.active {
    background-color: var(--color-green);
    color: white;
    border-color: var(--color-green);
}
.app-nav .btn-logout {
    border-color: var(--color-danger);
    color: var(--color-danger);
}
.app-nav .btn-logout:hover {
    background-color: var(--color-danger);
    color: white;
}

.app-main {
    padding: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.hidden { display: none !important; }

/* Dashboard */
.dashboard-cards {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}
.card {
    background: var(--color-card-dark);
    padding: 20px;
    border-radius: 8px;
    flex: 1;
    text-align: center;
    border-top: 4px solid var(--color-green);
}
.card h3 { margin: 0 0 10px; color: var(--color-text-dim); }
.big-number { font-size: 36px; font-weight: bold; margin: 0; color: var(--color-green); }

/* Animation Canvas */
.canvas-container {
    background: #111;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: inset 0px 0px 15px rgba(0,0,0,0.5);
}
.canvas-container h3 { margin-top: 0; color: #aaa; }
canvas {
    background: #000;
    border-radius: 4px;
    max-width: 100%;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    background: var(--color-card-dark);
    border-radius: 8px;
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}
.data-table th, .data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}
.data-table th {
    background-color: #242b32;
    font-weight: 600;
}
.data-table tr:hover {
    background-color: rgba(255,255,255,0.05);
}
/* Alertas Visuales en Filas */
.row-agotado {
    border-left: 5px solid var(--color-danger) !important;
}
.row-agotado td {
    color: var(--color-danger) !important;
    font-weight: bold;
}
.row-caducar {
    border-left: 5px solid var(--color-warning) !important;
}
.row-caducar td {
    color: #ffd32a !important; /* Yellow-Orange */
}
.label-agotado {
    background-color: var(--color-danger);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    text-transform: uppercase;
}

/* Modals */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    background: white; /* Modal blanco para que resalte y se lea */
    color: #333;
    padding: 30px;
    border-radius: 8px;
    width: 90%;
    max-width: 450px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
}
.close-modal {
    position: absolute;
    top: 15px; right: 20px;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    color: #999;
}
.close-modal:hover { color: #333; }

/* Loader */
#loader {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5); z-index: 9999;
    display: flex; justify-content: center; align-items: center;
}
.spinner {
    width: 50px; height: 50px;
    border: 5px solid #ccc;
    border-top-color: var(--color-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

/* Reportes */
.report-filters {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}
.report-filters label {
    display: flex;
    align-items: center;
    gap: 10px;
}
.report-filters .input-field { margin: 0; width: auto; }
.btn-export { background-color: #3498db; }
.btn-export:hover { background-color: #2980b9; }

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-header { flex-direction: column; gap: 10px; text-align: center; }
    .dashboard-cards { flex-direction: column; }
    .app-nav { justify-content: flex-start; }
}