/**
 * Estilos principales del Sistema de Mantenimientos
 * Diseño moderno, responsive y dinámico
 */

/* ============================================
   Variables CSS - Colores Llamativos
   ============================================ */
:root {
    /* Colores principales */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;

    /* Colores secundarios */
    --secondary-color: #f59e0b;
    --secondary-dark: #d97706;
    --secondary-light: #fbbf24;

    /* Colores de acento */
    --accent-color: #ec4899;
    --accent-dark: #db2777;
    --accent-light: #f472b6;

    /* Colores de estado */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;

    /* Colores neutros */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    /* 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Bordes */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transiciones */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* ============================================
   Reset y estilos base
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

/* ============================================
   Página de Login
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 1.5rem;
    position: relative;
    z-index: 10;
}

.login-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-2xl);
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-container {
    width: 104px;
    height: 104px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
    }
}

.logo-container i {
    font-size: 2.5rem;
    color: white;
}

.logo-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 0.5rem;
}

.login-header h1 {
    color: var(--bg-primary);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ============================================
   Formulario
   ============================================ */
.login-form {
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    color: var(--bg-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group label i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-normal);
    background: white;
    color: var(--bg-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.password-input {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    transition: color var(--transition-fast);
}

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

/* ============================================
   Botones
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-block {
    width: 100%;
}

/* ============================================
   Alertas
   ============================================ */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert i {
    font-size: 1.25rem;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--error-color);
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid var(--info-color);
}

/* ============================================
   Footer del Login
   ============================================ */
.login-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 2px solid #e2e8f0;
}

.info-text {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.demo-users {
    background: #f1f5f9;
    padding: 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.demo-user {
    color: var(--bg-secondary);
    margin: 0.25rem 0;
}

.demo-user strong {
    color: var(--primary-color);
}

/* ============================================
   Animación de fondo
   ============================================ */
.login-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
    pointer-events: none;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.circle-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.circle-3 {
    width: 150px;
    height: 150px;
    bottom: 10%;
    left: 50%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
    }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .login-container {
        padding: 1rem;
    }

    .login-box {
        padding: 2rem 1.5rem;
    }

    .login-header h1 {
        font-size: 1.5rem;
    }

    .logo-container {
        width: 70px;
        height: 70px;
    }

    .logo-container i {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .login-box {
        padding: 1.5rem 1rem;
    }

    .login-header h1 {
        font-size: 1.25rem;
    }

    .login-header p {
        font-size: 0.85rem;
    }

    .form-control {
        padding: 0.75rem 0.875rem;
        font-size: 0.95rem;
    }

    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.95rem;
    }
}

/* ============================================
   Utilidades
   ============================================ */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ============================================
   Footer de Login
   ============================================ */
.auth-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    z-index: 5;
}

.footer-content {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.75rem;
    margin-bottom: 0.25rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-authors {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.8rem;
    margin: 0.25rem 0;
    line-height: 1.5;
}

.footer-year {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.7rem;
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .auth-footer {
        padding: 0.75rem 1rem;
    }

    .footer-text {
        font-size: 0.7rem;
    }

    .footer-authors {
        font-size: 0.7rem;
    }

    .footer-year {
        font-size: 0.65rem;
    }
}