:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --light: #ecf0f1;
    --dark: #34495e;
    --gray: #95a5a6;
    --border: #e0e0e0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

/* ===== SISTEMA DE LOGIN ===== */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-logo {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo h1 {
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 2rem;
}

.login-logo p {
    color: var(--gray);
    font-size: 1rem;
}

.login-demo {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
    font-size: 0.9rem;
    border-left: 4px solid var(--secondary);
}

.login-demo p {
    margin: 5px 0;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
}

/* ===== ESTRUCTURA PRINCIPAL ===== */
.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--primary);
    color: white;
    padding: 20px 0;
    transition: all 0.3s;
    box-shadow: var(--shadow);
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 20px;
}

.logo h2 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    list-style: none;
    flex: 1;
}

.nav-links li {
    padding: 12px 20px;
    transition: all 0.3s;
    cursor: pointer;
    border-left: 3px solid transparent;
}

.nav-links li:hover {
    background-color: rgba(255,255,255,0.05);
}

.nav-links li.active {
    background-color: rgba(255,255,255,0.1);
    border-left: 3px solid var(--secondary);
}

.nav-links a {
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.nav-links i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.user-info {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: auto;
}

.user-info .btn {
    width: 100%;
    margin-top: 10px;
    background: rgba(255,255,255,0.1);
    color: white;
    border-color: rgba(255,255,255,0.3);
}

.user-info .btn:hover {
    background: rgba(255,255,255,0.2);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background-color: #f8f9fa;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
}

.header h1 {
    color: var(--primary);
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* Stats Cards */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    align-items: center;
    gap: 15px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.leads .card-icon {
    background-color: rgba(52, 152, 219, 0.1);
    color: var(--secondary);
}

.meetings .card-icon {
    background-color: rgba(39, 174, 96, 0.1);
    color: var(--success);
}

.pending .card-icon {
    background-color: rgba(243, 156, 18, 0.1);
    color: var(--warning);
}

.closed .card-icon {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--danger);
}

.card-info h3 {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 5px;
    font-weight: 500;
}

.card .value {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary);
}

/* Content Area */
.content-area {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.leads-table, .calendar, .reports-container, .settings-container {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h2 {
    color: var(--primary);
    font-weight: 600;
}

.table-container {
    overflow-x: auto;
}

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

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--primary);
    position: sticky;
    top: 0;
}

tr:hover {
    background-color: #f8f9fa;
}

/* ===== SELECTOR DE ESTADO MEJORADO ===== */
.status-select-container {
    position: relative;
    display: inline-block;
}

.status-select {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 2px solid transparent;
    outline: none;
    cursor: pointer;
    transition: all 0.3s;
    min-width: 130px;
    text-align: center;
    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='currentColor' 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 8px center;
    background-size: 12px;
    padding-right: 30px;
}

.status-select:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.status-select:focus {
    border-color: var(--secondary);
}

.status-select.new {
    background-color: #e3f2fd;
    color: var(--secondary);
    border-color: #bbdefb;
}

.status-select.contacted {
    background-color: #fff3e0;
    color: var(--warning);
    border-color: #ffe0b2;
}

.status-select.negotiation {
    background-color: #e8f5e9;
    color: var(--success);
    border-color: #c8e6c9;
}

.status-select.closed {
    background-color: #ffebee;
    color: var(--danger);
    border-color: #ffcdd2;
}

/* Buttons */
.btn {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

.btn-primary {
    background-color: var(--secondary);
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-success {
    background-color: var(--success);
    color: white;
}

.btn-success:hover {
    background-color: #219653;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--dark);
}

.btn-outline:hover {
    background-color: #f8f9fa;
}

.btn-icon {
    padding: 8px;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-sm {
    padding: 5px 8px;
    font-size: 0.8rem;
}

.action-buttons {
    display: flex;
    gap: 5px;
}

/* Calendar */
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day {
    padding: 10px;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calendar-day:hover {
    background-color: #f0f0f0;
}

.calendar-day.active {
    background-color: var(--secondary);
    color: white;
}

.calendar-day.has-event::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--danger);
    border-radius: 50%;
}

.calendar-day.other-month {
    color: var(--gray);
    opacity: 0.5;
}

/* Calendario estilo Google */
.calendar-grid-full {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background-color: var(--border);
    border: 1px solid var(--border);
}

.calendar-day-full {
    background: white;
    padding: 8px;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    border: 1px solid #e0e0e0;
    transition: all 0.2s;
}

.calendar-day-full:hover {
    background-color: #f8f9fa;
}

.calendar-day-full.today {
    background-color: #e3f2fd;
}

.calendar-day-full.other-month {
    background-color: #fafafa;
    color: #ccc;
}

.calendar-day-number {
    font-weight: bold;
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.calendar-events {
    flex: 1;
    overflow-y: auto;
    max-height: 90px;
}

.calendar-event {
    font-size: 0.75rem;
    padding: 3px 6px;
    margin-bottom: 3px;
    border-radius: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    border-left: 3px solid;
}

.calendar-event.meeting {
    background-color: #e3f2fd;
    border-left-color: var(--secondary);
    color: var(--secondary);
}

.calendar-event.followup {
    background-color: #fff3e0;
    border-left-color: var(--warning);
    color: var(--warning);
}

.calendar-event.urgent {
    background-color: #ffebee;
    border-left-color: var(--danger);
    color: var(--danger);
}

.calendar-event-time {
    font-weight: 600;
    font-size: 0.7rem;
}

.event-list {
    margin-top: 20px;
}

.event-item {
    padding: 10px;
    border-left: 3px solid var(--secondary);
    margin-bottom: 10px;
    background-color: #f8f9fa;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 4px;
}

.event-time {
    font-size: 0.8rem;
    color: var(--gray);
}

.event-list-full {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    height: fit-content;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    border-radius: var(--radius);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 20px 0 20px;
    margin-bottom: 20px;
}

.modal-header h2 {
    color: var(--primary);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--gray);
}

.close-modal:hover {
    color: var(--dark);
}

.form-group {
    margin-bottom: 20px;
    padding: 0 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 1rem;
    transition: border 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin: 0 20px;
}

.tab {
    padding: 12px 20px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    font-weight: 500;
}

.tab.active {
    border-bottom: 3px solid var(--secondary);
    color: var(--secondary);
}

.tab-content {
    display: none;
    padding: 0 20px;
}

.tab-content.active {
    display: block;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.product-tag {
    background-color: #e3f2fd;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    transition: all 0.2s;
}

.product-tag:hover {
    background-color: #d1eaff;
}

.product-tag input {
    margin-right: 5px;
}

.form-actions {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}

.form-actions-right {
    display: flex;
    gap: 10px;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 4px;
    color: white;
    font-weight: 600;
    z-index: 1100;
    transition: all 0.3s;
    opacity: 0;
    transform: translateY(-20px);
    box-shadow: var(--shadow);
}

.notification.show {
    opacity: 1;
    transform: translateY(0);
}

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

.notification.error {
    background-color: var(--danger);
}

/* Reports */
.reports-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.report-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}

.report-card h2 {
    color: var(--primary);
    margin-bottom: 15px;
    font-weight: 600;
}

.chart-container {
    height: 300px;
    margin-top: 10px;
    position: relative;
}

.report-card.full-width {
    grid-column: 1 / -1;
}

.activity-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.summary-item {
    text-align: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: var(--radius);
}

.summary-item h3 {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 10px;
    font-weight: 500;
}

.summary-value {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary);
}

/* Settings */
.settings-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.settings-option {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}

.settings-option h3 {
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.data-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

/* Filters */
.filters {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: end;
}

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

.filter-group label {
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--dark);
    font-size: 0.9rem;
}

/* Quick Event Modal */
.quick-event-modal {
    max-width: 500px;
}

.event-preview {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 15px;
    border-left: 4px solid var(--secondary);
}

/* Responsive */
@media (max-width: 1200px) {
    .content-area {
        grid-template-columns: 1fr;
    }
    
    .reports-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar .logo h2 span, .sidebar .nav-text {
        display: none;
    }
    
    .sidebar .nav-links i {
        margin-right: 0;
        font-size: 1.2rem;
    }
    
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filters {
        flex-direction: column;
        align-items: stretch;
    }
    
    .user-info {
        padding: 10px;
    }
    
    .user-info .btn {
        font-size: 0.8rem;
        padding: 6px 10px;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 15px;
    }
    
    .stats-cards {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .header-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .form-actions-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .calendar-day-full {
        min-height: 80px;
        padding: 4px;
    }
    
    .calendar-event {
        font-size: 0.7rem;
        padding: 2px 4px;
    }
    
    .status-select {
        min-width: 110px;
        font-size: 0.7rem;
    }
}