/* 
 * Archivo: frontend/css/global.css
 * Descripción: Variables, reset, tipografía y estilos globales reutilizables.
 */

:root {
    /* Paleta corporativa (Empresa de Pinturas) */
    --primary: #004c97;
    --primary-dark: #00376d;
    --background: #f5f6f8;
    --surface: #ffffff;
    --text: #1f2937;
    --text-light: #6b7280;
    --border: #e5e7eb;
    --danger: #dc2626;
    --success: #16a34a;

    /* Sombras y Radios */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    /* Transiciones */
    --transition-fast: 0.15s ease-in-out;
}

/* =========================================================
   RESET BÁSICO
   ========================================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* =========================================================
   ELEMENTOS GLOBALES
   ========================================================= */

/* Contenedor Base */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* =========================================================
   CONTROLES DE FORMULARIO (INPUTS, LABELS)
   ========================================================= */
.form-group {
    margin-bottom: 1.25rem;
    position: relative;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text);
    background-color: var(--surface);
    background-clip: padding-box;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 76, 151, 0.15);
}

.form-control::placeholder {
    color: var(--text-light);
    opacity: 0.7;
}

.form-control[disabled] {
    background-color: var(--background);
    cursor: not-allowed;
    opacity: 0.7;
}

/* Botón de ojito para contraseñas */
.btn-toggle-password {
    position: absolute;
    right: 1rem;
    top: 2.1rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    font-size: 1.2rem;
}

/* =========================================================
   BOTONES
   ========================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    width: 100%;
}

.btn-primary {
    color: #fff;
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-primary:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 76, 151, 0.4);
}

.btn-primary:disabled,
.btn-primary.loading {
    background-color: var(--primary);
    border-color: var(--primary);
    opacity: 0.7;
    cursor: not-allowed;
}

/* =========================================================
   ALERTAS / MENSAJES DE ERROR
   ========================================================= */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    display: none; /* Oculto por defecto */
}

.alert.show {
    display: block;
}

.alert-danger {
    color: var(--danger);
    background-color: #fef2f2;
    border-color: #fecaca;
}

.alert-success {
    color: var(--success);
    background-color: #f0fdf4;
    border-color: #bbf7d0;
}

.error-text {
    color: var(--danger);
    font-size: 0.8rem;
    margin-top: 0.25rem;
    display: none;
}

.error-text.show {
    display: block;
}

.form-control.is-invalid {
    border-color: var(--danger);
}