/* ==========================================================================
   Sistema de QR Dinámicos - Estilos Modernos y Minimalistas
   ========================================================================== */

:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #fcfdfe;
    --border-color: #e2e8f0;
    --border-focus: #6366f1;
    
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --primary-border: #c7d2fe;
    
    --success: #10b981;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Enlaces */
a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--primary-hover);
}

/* Layout General */
.app-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 24px 20px;
    width: 100%;
    flex: 1;
}

/* Navbar */
.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(8px);
}
.navbar-inner {
    max-width: 1140px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text-main);
    text-decoration: none;
}
.brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), #818cf8);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.95rem;
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.user-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
    background: var(--bg-main);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}
.user-badge .avatar-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.25;
}
.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}
.btn-secondary {
    background-color: #ffffff;
    color: var(--text-main);
    border-color: var(--border-color);
}
.btn-secondary:hover {
    background-color: var(--bg-main);
    border-color: var(--text-light);
}
.btn-outline-danger {
    background-color: transparent;
    color: var(--danger);
    border-color: var(--danger-border);
}
.btn-outline-danger:hover {
    background-color: var(--danger-bg);
}
.btn-sm {
    padding: 6px 12px;
    font-size: 0.82rem;
}
.btn-lg {
    padding: 12px 20px;
    font-size: 1rem;
}
.btn-block {
    width: 100%;
}

/* Tarjetas y Contenedores */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    transition: var(--transition);
}
.card:hover {
    box-shadow: var(--shadow-md);
}

/* Alertas y Mensajes Flash */
.flash-alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: fadeIn 0.3s ease;
}
.flash-success {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: #065f46;
}
.flash-error {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: #991b1b;
}
.flash-warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: #92400e;
}
.flash-info {
    background: var(--primary-light);
    border: 1px solid var(--primary-border);
    color: #3730a3;
}

/* Formularios */
.form-group {
    margin-bottom: 18px;
}
.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
}
.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: #ffffff;
    color: var(--text-main);
    transition: var(--transition);
    outline: none;
}
.form-control:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.form-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 5px;
}

/* Grupo de contraseña con botón Ver/Ocultar */
.password-input-group {
    position: relative;
    display: flex;
    align-items: center;
}
.password-input-group .form-control {
    padding-right: 44px;
}
.btn-toggle-password {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: var(--transition);
}
.btn-toggle-password:hover {
    color: var(--text-main);
    background: #f1f5f9;
}
.btn-toggle-password svg {
    width: 20px;
    height: 20px;
}

/* Autenticación (Login / Registro) */
.auth-wrapper {
    min-height: calc(100vh - 140px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 36px 32px;
}
.auth-header {
    text-align: center;
    margin-bottom: 28px;
}
.auth-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.auth-header p {
    font-size: 0.9rem;
    color: var(--text-muted);
}
.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* Dashboard Header & Grid */
.dashboard-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
}
.dashboard-header h1 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-main);
}
.dashboard-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
}
.stat-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
}

/* QR Grid Cards */
.qr-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}
.qr-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}
.qr-card:hover {
    border-color: var(--primary-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.qr-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}
.qr-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.badge-active {
    background-color: var(--success-bg);
    color: #065f46;
    border: 1px solid var(--success-border);
}
.badge-paused {
    background-color: var(--warning-bg);
    color: #92400e;
    border: 1px solid var(--warning-border);
}
.qr-url-box {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin: 12px 0;
}
.qr-url-label {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
}
.qr-url-target {
    font-size: 0.88rem;
    color: var(--primary);
    font-weight: 500;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.qr-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: 8px;
}

/* Vista de Detalle y Configuración */
.detail-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 24px;
    align-items: start;
}
@media (max-width: 860px) {
    .detail-layout {
        grid-template-columns: 1fr;
    }
}

.qr-preview-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}
.qr-canvas-wrapper {
    background: #ffffff;
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: inline-block;
    margin: 16px 0;
    box-shadow: var(--shadow-sm);
}
.qr-canvas-wrapper canvas,
.qr-canvas-wrapper img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
}
.short-link-badge {
    background: var(--primary-light);
    border: 1px dashed var(--primary-border);
    color: var(--primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.88rem;
    word-break: break-all;
    margin-bottom: 16px;
    cursor: pointer;
    transition: var(--transition);
}
.short-link-badge:hover {
    background: #e0e7ff;
}

/* Tablas e Historial */
.table-responsive {
    overflow-x: auto;
    margin-top: 16px;
}
.history-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
    text-align: left;
}
.history-table th {
    background: var(--bg-main);
    color: var(--text-muted);
    font-weight: 600;
    padding: 10px 14px;
    border-bottom: 2px solid var(--border-color);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.history-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}
.history-table tr:hover td {
    background-color: var(--bg-card-hover);
}
.history-url-cell {
    max-width: 320px;
    word-break: break-all;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    padding: 20px;
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.modal-box {
    background: var(--bg-card);
    width: 100%;
    max-width: 480px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 28px;
    transform: translateY(20px);
    transition: transform 0.2s ease;
}
.modal-overlay.active .modal-box {
    transform: translateY(0);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.modal-close {
    background: transparent;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-muted);
}

/* Toast de notificación */
.toast-notice {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: #1e293b;
    color: white;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 120;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
    pointer-events: none;
}
.toast-notice.show {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Módulo de Diseño de Códigos QR ("Diseña tu código QR")
   ========================================================================== */

.designer-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 24px;
}

.designer-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px 16px;
    border-bottom: 1px solid #f1f5f9;
}

.step-number-badge {
    background: #1e293b;
    color: #ffffff;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.designer-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
}

/* Pestañas de Navegación */
.designer-tabs {
    display: flex;
    gap: 8px;
    padding: 0 24px;
    border-bottom: 1px solid var(--border-color);
    background: #ffffff;
}

.designer-tab-btn {
    background: transparent;
    border: none;
    padding: 14px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    color: #64748b;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.designer-tab-btn:hover {
    color: #0f172a;
}

.designer-tab-btn.active {
    color: #0d9488;
    border-bottom-color: #0d9488;
}

.designer-tab-pane {
    display: none;
    padding: 24px;
    animation: fadeIn 0.25s ease;
}

.designer-tab-pane.active {
    display: block;
}

/* Secciones y Subtítulos */
.designer-section {
    margin-bottom: 24px;
}
.designer-section:last-child {
    margin-bottom: 0;
}

.designer-section-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: #334155;
    margin-bottom: 12px;
    text-transform: none;
}

/* Grillas de Opciones (Botones con Iconos) */
.options-btn-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.option-btn {
    width: 58px;
    height: 58px;
    background: #ffffff;
    border: 1.5px solid #e2e8f0;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 8px;
    position: relative;
}

.option-btn:hover {
    border-color: #94a3b8;
    background: #f8fafc;
    transform: translateY(-1px);
}

.option-btn.active {
    background: #eff6ff;
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.option-btn svg {
    width: 100%;
    height: 100%;
    display: block;
}

.option-btn-icon-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: #475569;
}

/* Filas de Configuración de Color y Switches */
.color-controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 18px;
}

@media (max-width: 640px) {
    .color-controls-grid {
        grid-template-columns: 1fr;
    }
}

.color-field-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.color-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #475569;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    padding: 4px 6px;
    gap: 8px;
    transition: var(--transition);
}
.color-picker-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.color-hex-input {
    border: none;
    background: transparent;
    font-family: monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: #0f172a;
    width: 100%;
    padding: 4px;
    outline: none;
    text-transform: uppercase;
}

.color-native-trigger {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
    overflow: hidden;
}
.color-native-trigger::-webkit-color-swatch-wrapper {
    padding: 0;
}
.color-native-trigger::-webkit-color-swatch {
    border: none;
    border-radius: 5px;
}

/* Switch Toggle Moderno */
.toggle-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 6px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #cbd5e1;
    transition: 0.2s;
    border-radius: 20px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.2s;
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: #3b82f6;
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(16px);
}

.toggle-label-text {
    font-size: 0.82rem;
    font-weight: 600;
    color: #475569;
    cursor: pointer;
}

/* Subida de Archivo de Logo */
.upload-logo-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #ffffff;
    border: 1.5px dashed #cbd5e1;
    border-radius: 10px;
    padding: 14px 18px;
    margin-bottom: 24px;
    transition: var(--transition);
}
.upload-logo-box:hover {
    border-color: #3b82f6;
    background: #f8fafc;
}

.upload-logo-preview {
    display: flex;
    align-items: center;
    gap: 12px;
}

.upload-logo-thumb {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    background: #f1f5f9;
    object-fit: contain;
    padding: 4px;
}

.upload-logo-info {
    display: flex;
    flex-direction: column;
}

.upload-logo-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: #0f172a;
}
.upload-logo-hint {
    font-size: 0.75rem;
    color: #94a3b8;
}

.file-input-hidden {
    display: none;
}

/* Galería de Presets de Logos */
.presets-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.preset-btn {
    width: 54px;
    height: 54px;
    border-radius: 10px;
    border: 1.5px solid #e2e8f0;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 6px;
}
.preset-btn:hover {
    border-color: #94a3b8;
    background: #f8fafc;
    transform: translateY(-1px);
}
.preset-btn.active {
    background: #eff6ff;
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}
.preset-btn svg {
    width: 100%;
    height: 100%;
}

/* Panel de Vista Previa Física */
.qr-live-canvas-container {
    background: #ffffff;
    padding: 16px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 240px;
    margin-bottom: 16px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.qr-live-canvas-container canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 20px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-muted);
    background: var(--bg-card);
    margin-top: auto;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}