:root {
    /* Sistema de diseño - Modo Claro */
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    /* Colores - Modo Claro */
    --bg-primary: #f8f9fa;
    --bg-secondary: rgba(255, 255, 255, 0.85);
    --text-primary: #2c3e50;
    --text-secondary: #5a6b82;
    --accent-color: #1a73e8;
    --border-color: rgba(209, 209, 209, 0.6);
    --input-bg: rgba(255, 255, 255, 0.7);
    --image-opacity: 1;
    
    /* Modales - Modo Claro */
    --modal-bg: rgba(255, 255, 255, 0.9);
    --modal-text: #2c3e50;
    --modal-border: rgba(222, 226, 230, 0.6);
    --modal-header-bg: rgba(248, 249, 250, 0.8);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
    --backdrop-blur: blur(12px);
}

[data-theme="dark"] {
    /* Colores - Modo Oscuro */
    --bg-primary: #121826;
    --bg-secondary: rgba(30, 41, 59, 0.85);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --border-color: rgba(51, 65, 85, 0.6);
    --input-bg: rgba(26, 36, 58, 0.7);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --image-opacity: 0.8;
    
    /* Modales - Modo Oscuro */
    --modal-bg: rgba(30, 41, 59, 0.9);
    --modal-text: #e2e8f0;
    --modal-border: rgba(51, 65, 85, 0.6);
    --modal-header-bg: rgba(45, 55, 72, 0.8);
    
    /* Glassmorphism - Modo Oscuro */
    --glass-bg: rgba(30, 41, 59, 0.25);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* Estilos base mejorados */
body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    height: 100vh;
    transition: var(--transition);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.03) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.03) 0%, transparent 20%);
}

.wrapper {
    display: flex;
    height: 100vh;
    animation: fadeIn 0.8s ease-in-out;
}

.container {
    padding: 0.5rem;
}

/* Sidebar optimizado */
.form-container {
    position: relative;
    background: var(--bg-secondary);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    z-index: 2;
    box-shadow: var(--shadow);
    border-right: 1px solid var(--glass-border);
    animation: slideInLeft 0.8s ease-in-out;
    transition: var(--transition);
}

.form-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    z-index: -1;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.form-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 600;
    font-size: 1.8rem;
    color: var(--text-primary);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Input groups mejorados */
.input-group-classic {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-wrapper {
    position: relative;
}

/* Unificar estilos de inputs */
.input-classic,
input[type="password"],
input[type="text"],
input[type="email"] {
    width: 100%;
    height: 50px;
    padding: 0 3rem 0 2.8rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: var(--transition);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    box-sizing: border-box;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.input-classic:focus,
input[type="password"]:focus,
input[type="text"]:focus,
input[type="email"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 
        0 0 0 3px rgba(26, 115, 232, 0.15),
        0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

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

.input-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 1.1rem;
    z-index: 2;
    transition: var(--transition);
}

.input-classic:focus + .input-icon {
    color: var(--accent-color);
}

/* Botones optimizados */
.btn-classic {
    width: 100%;
    font-weight: 600;
    border-radius: var(--border-radius);
    padding: 0.8rem;
    background: var(--accent-color);
    color: white;
    border: none;
    transition: var(--transition);
    font-size: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.btn-classic:hover {
    background: #0d62d0;
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.btn-link-classic {
    text-decoration: none;
    transition: var(--transition);
    color: var(--accent-color);
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
    display: inline-block;
}

.btn-link-classic::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.btn-link-classic:hover::after {
    width: 100%;
}

/* Toggle de contraseña mejorado */
.toggle-pass {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    z-index: 3;
    border-radius: 50%;
    transition: var(--transition);
}

.toggle-pass:hover {
    color: var(--accent-color);
    background: rgba(0, 0, 0, 0.05);
}

/* Checkbox mejorado */
.form-check {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check-input {
    margin-right: 0;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.form-check-label {
    color: var(--text-primary);
    cursor: pointer;
}

/* Toggle de tema optimizado */
.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 54px;
    height: 28px;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 999px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 3px;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: scale(1.05);
}

.theme-toggle span {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-color);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .theme-toggle span {
    transform: translateX(26px);
}

.theme-toggle i {
    position: absolute;
    font-size: 12px;
    color: var(--text-primary);
    transition: opacity 0.3s ease;
}

.theme-toggle .fa-sun {
    left: 6px;
    opacity: 0.7;
}

.theme-toggle .fa-moon {
    right: 6px;
    opacity: 0.7;
}

/* Imagen mantenida igual */
.image {
    flex: 1;
    min-width: 0;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.15)),
        url("../img/crm2021.png") no-repeat center center;
    background-size: cover;
    animation: zoomIn 1.5s ease forwards;
    opacity: var(--image-opacity);
    transition: opacity 0.3s ease;
    position: relative;
}

/* Modal mejorado */
.custom-modal {
    --bs-modal-bg: var(--modal-bg);
    --bs-modal-color: var(--modal-text);
    --bs-modal-border-color: var(--modal-border);
    --bs-modal-header-border-color: var(--modal-border);
    --bs-modal-footer-border-color: var(--modal-border);
}

.custom-modal .modal-header {
    background-color: var(--modal-header-bg);
    border-bottom: 1px solid var(--modal-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.custom-modal .modal-title {
    color: var(--text-primary);
    font-weight: 600;
}

.custom-modal .modal-body {
    background-color: var(--modal-bg);
    color: var(--modal-text);
    line-height: 1.6;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.custom-modal .modal-footer {
    background-color: var(--modal-header-bg);
    border-top: 1px solid var(--modal-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.custom-modal .btn-primary {
    background-color: var(--accent-color);
    border: none;
}

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

.custom-modal .btn-outline:hover {
    background-color: var(--border-color);
}

/* Responsive mejorado */
@media (max-width: 992px) {
    .wrapper {
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background: linear-gradient(rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.15)),
            url("../img/crm2021.png") no-repeat center center;
        background-size: cover;
        padding: 20px;
        height: auto;
        min-height: 100vh;
    }

    .image {
        display: none;
    }

    .form-container {
        width: 100%;
        max-width: 450px;
        border-radius: var(--border-radius);
        margin: 0 auto;
        padding: 2rem;
        background: var(--bg-secondary);
        backdrop-filter: var(--backdrop-blur);
        -webkit-backdrop-filter: var(--backdrop-blur);
        border: 1px solid var(--glass-border);
        border-right: none;
    }

    .form-container::before {
        border-radius: var(--border-radius);
    }
}

/* Mobile pequeño */
@media (max-width: 480px) {
    .form-container {
        padding: 1.5rem;
    }
    
    .form-container h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .input-classic,
    input[type="password"],
    input[type="text"],
    input[type="email"] {
        height: 46px;
        font-size: 0.9rem;
    }
    
    .btn-classic {
        padding: 0.7rem;
    }
}

/* Animaciones mantenidas */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes zoomIn {
    from {
        transform: scale(1.1);
        opacity: 0.8;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible para mejor accesibilidad */
.input-classic:focus-visible,
.toggle-pass:focus-visible,
.btn-classic:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}