/**
 * Estilos Generales - POS Tienda Universitaria
 * Sistema de diseño simple y limpio optimizado para uso rápido
 */

/* ============================================================================
   RESET Y BASE
   ============================================================================ */

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

:root {
    /* Colores principales */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-success: #16a34a;
    --color-danger: #dc2626;
    --color-warning: #ea580c;
    --color-info: #0891b2;

    /* Colores de fondo */
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --bg-hover: #f1f5f9;

    /* Colores de texto */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    /* Bordes */
    --border-color: #e2e8f0;
    --border-radius: 8px;

    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    /* Tipografía */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;

    /* Espaciado */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-body);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   PÁGINA DE LOGIN
   ============================================================================ */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-md);
}

.login-box {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-header h1 {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.login-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.login-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.login-footer p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

/* ============================================================================
   FORMULARIOS
   ============================================================================ */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--font-size-base);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-input);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

/* Password con toggle de visibilidad */
.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-wrapper input[type="password"],
.password-wrapper input[type="text"] {
    padding-right: 48px; /* Espacio para el botón */
}

.password-toggle {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-secondary);
    font-size: 18px;
    line-height: 1;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    color: var(--color-primary);
}

.password-toggle:focus {
    outline: none;
    color: var(--color-primary);
}

/* ============================================================================
   BOTONES
   ============================================================================ */

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1.5;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
}

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

.btn-success:hover:not(:disabled) {
    background-color: #15803d;
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #b91c1c;
}

.btn-secondary {
    background-color: #64748b;
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background-color: #475569;
}

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

.btn-info:hover:not(:disabled) {
    background-color: #0e7490;
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
}

/* ============================================================================
   MENSAJES Y ALERTAS
   ============================================================================ */

.error-message,
.success-message,
.warning-message,
.info-message {
    padding: 12px 16px;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.error-message {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.success-message {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.warning-message {
    background-color: #ffedd5;
    color: #9a3412;
    border: 1px solid #fed7aa;
}

.info-message {
    background-color: #e0f2fe;
    color: #075985;
    border: 1px solid #bae6fd;
}

/* ============================================================================
   UTILIDADES
   ============================================================================ */

.text-muted {
    color: var(--text-muted);
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }

/* ============================================================================
   LOADER / SPINNER
   ============================================================================ */

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================================================
   TOAST NOTIFICATIONS
   ============================================================================ */

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    background: white;
    padding: 16px 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    max-width: 500px;
    pointer-events: all;
    animation: slideInRight 0.3s ease;
    border-left: 4px solid var(--color-primary);
}

.toast.toast-success {
    border-left-color: var(--color-success);
}

.toast.toast-error {
    border-left-color: var(--color-danger);
}

.toast.toast-warning {
    border-left-color: var(--color-warning);
}

.toast.toast-info {
    border-left-color: var(--color-info);
}

.toast-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.toast-close {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
}

.toast-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

.toast.hiding {
    animation: slideOutRight 0.3s ease;
}

/* ============================================================================
   ALERTS
   ============================================================================ */

.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
}

.alert-warning {
    background: #fef3c7;
    border-left-color: var(--color-warning);
    color: #92400e;
}

.alert-info {
    background: #e0f2fe;
    border-left-color: var(--color-info);
    color: #075985;
}

.alert-success {
    background: #dcfce7;
    border-left-color: var(--color-success);
    color: #166534;
}

.alert-danger {
    background: #fee2e2;
    border-left-color: var(--color-danger);
    color: #991b1b;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 640px) {
    :root {
        --font-size-base: 14px;
    }

    .login-container {
        padding: var(--spacing-sm);
    }

    .login-box {
        padding: var(--spacing-lg);
    }
}