/* ==========================================================================
   Clean Light Premium - Sistema de Diseño CSS para la Calculadora SaaS
   ========================================================================== */

:root {
    /* Paleta de colores HSL */
    --primary: #8A0194;
    --primary-hover: #6E0176;
    --primary-light: #FBF0FC;
    --primary-hue: 296;
    
    --secondary-hue: 200;
    --secondary: hsl(var(--secondary-hue), 10%, 40%);
    --secondary-hover: hsl(var(--secondary-hue), 10%, 30%);
    
    --success: hsl(150, 80%, 40%);
    --success-light: hsl(150, 80%, 96%);
    --danger: hsl(350, 80%, 55%);
    --danger-light: hsl(350, 80%, 96%);
    --warning: hsl(45, 90%, 50%);
    --warning-light: hsl(45, 90%, 96%);
    
    --bg-app: hsl(220, 20%, 98%);
    --bg-card: hsl(0, 0%, 100%);
    --border-color: hsl(220, 15%, 90%);
    
    --text-main: hsl(220, 25%, 20%);
    --text-muted: hsl(220, 15%, 50%);
    --text-inverse: hsl(0, 0%, 100%);
    
    /* Fuentes y espaciado */
    --font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 10px 30px rgba(18, 30, 60, 0.06);
    --shadow-lg: 0 20px 50px rgba(18, 30, 60, 0.1);
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-stack);
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.app-header {
    background-color: #000000;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #222222;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.app-logo strong {
    font-weight: 800;
}

.app-logo:hover {
    transform: translateY(-1px);
}

.app-nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    color: #A3A3A3;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition-fast);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
}

.nav-link:hover, .nav-link.active {
    color: #ffffff;
    background-color: #26002A;
}

/* Botones */
.nav-btn, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
    outline: none;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 12px hsla(var(--primary-hue), 85%, 55%, 0.2);
}

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

.btn-secondary:hover {
    background-color: hsl(var(--primary-hue), 85%, 92%);
}

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

.btn-outline:hover {
    background-color: var(--bg-app);
    color: var(--text-main);
}

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

.btn-danger:hover {
    background-color: hsl(350, 80%, 45%);
}

/* Main */
.app-main {
    flex: 1;
    padding: 40px 0;
}

.main-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Alertas */
.alert {
    padding: 16px 20px;
    border-radius: var(--border-radius-md);
    margin-bottom: 24px;
    font-weight: 500;
    font-size: 15px;
}

.alert-success {
    background-color: var(--success-light);
    color: var(--success);
    border: 1px solid rgba(0, 200, 100, 0.2);
}

.alert-danger {
    background-color: var(--danger-light);
    color: var(--danger);
    border: 1px solid rgba(220, 50, 50, 0.2);
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    padding: 24px;
    transition: var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.card-subtitle {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* Footer */
.app-footer {
    background-color: #000000;
    border-top: 1px solid #222222;
    padding: 24px 0;
    font-size: 14px;
    color: #A3A3A3;
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-tag {
    font-weight: 600;
    color: #FF5CFF;
}

/* Formularios */
.form-group {
    margin-bottom: 14px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
}

.form-input, .form-select {
    width: 100%;
    max-width: 450px;
    padding: 9px 12px;
    font-size: 14px;
    font-family: var(--font-stack);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-app);
    color: var(--text-main);
    transition: var(--transition-fast);
}

.form-input[type="number"] {
    max-width: 220px;
}

.form-input:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
    outline: none;
}

.form-help {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Switch toggles */
.switch-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-app);
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: hsl(220, 10%, 80%);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* Entornos (Checkboxes como botones premium) */
.env-checkbox-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.env-checkbox-card {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 16px;
    text-align: center;
    cursor: pointer;
    background-color: var(--bg-card);
    transition: var(--transition-fast);
    font-weight: 600;
}

.env-checkbox-card input {
    position: absolute;
    opacity: 0;
}

.env-checkbox-card:hover {
    border-color: var(--primary);
    background-color: var(--primary-light);
}

.env-checkbox-card.selected {
    border-color: var(--primary);
    background-color: var(--primary-light);
    color: var(--primary);
    box-shadow: 0 4px 12px hsla(var(--primary-hue), 85%, 55%, 0.1);
}

/* Wizard */
.wizard-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 16px;
}

.wizard-step {
    flex: 1;
    text-align: center;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 15px;
    position: relative;
}

.wizard-step.active {
    color: var(--primary);
}

.wizard-step.completed {
    color: var(--success);
}

.wizard-step-body {
    display: none;
}

.wizard-step-body.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

/* Dashboard / Historial */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 32px;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

.history-table th, .history-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.history-table th {
    font-weight: 700;
    color: var(--text-muted);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.history-table tr:hover {
    background-color: var(--bg-app);
}

.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    font-weight: 700;
}

.badge-azure { background-color: #e1f5fe; color: #0288d1; }
.badge-aws { background-color: #fff3e0; color: #f57c00; }
.badge-gcp { background-color: #e8f5e9; color: #388e3c; }

/* Resultado */
.result-header {
    text-align: center;
    margin-bottom: 40px;
}

.result-price-large {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    margin: 12px 0;
    letter-spacing: -1px;
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.cost-breakdown-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.cost-breakdown-item:last-child {
    border-bottom: none;
}

.cost-breakdown-label {
    font-weight: 600;
}

.cost-breakdown-value {
    font-weight: 700;
    color: var(--text-main);
}

/* Gráfico de Dona SVG */
.chart-container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.donut-chart {
    transform: rotate(-90deg);
}

.donut-hole {
    fill: var(--bg-card);
}

.donut-ring {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 4;
}

.donut-segment {
    fill: none;
    stroke-width: 4;
    transition: stroke-dasharray 0.3s ease, stroke-dashoffset 0.3s ease;
}

.chart-center-text {
    position: absolute;
    text-align: center;
}

.chart-center-val {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-main);
}

.chart-center-lbl {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
}

/* Estilo de pestañas para parámetros */
.tabs-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    padding: 10px 16px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-fast);
    border: none;
    background: transparent;
    color: var(--text-muted);
}

.tab-btn.active {
    background-color: var(--primary-light);
    color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* User Badge */
.user-badge {
    font-size: 13px;
    font-weight: 600;
    background-color: var(--bg-app);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

/* Responsividad */
@media (max-width: 992px) {
    .dashboard-grid, .result-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        height: auto;
        padding: 16px 0;
        gap: 12px;
    }
    .app-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}