/* Reset y variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colores basados en la imagen */
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-card: #242424;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --accent-green: #4CAF50;
    --accent-green-dark: #2E7D32;
    --accent-green-light: #66BB6A;
    --error: #f44336;
    --success: #4CAF50;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-image: radial-gradient(circle at 50% 0%, #1a2f1a 0%, var(--bg-primary) 50%);
}

/* Contenedor principal */
.login-container {
    width: 100%;
    max-width: 420px;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Caja de login */
.login-box {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 
                0 0 0 1px rgba(76, 175, 80, 0.1);
}

/* Header */
.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--accent-green);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Alertas */
.alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    animation: slideIn 0.3s ease;
}

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

.alert-error {
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid rgba(244, 67, 54, 0.3);
    color: #ef5350;
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.3);
    color: var(--accent-green-light);
}

/* Formulario */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 15px;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus {
    border-color: var(--accent-green);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.1);
}

.form-group input::placeholder {
    color: #666;
}

.password-input {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input input {
    padding-right: 50px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: var(--transition);
}

.toggle-password:hover {
    opacity: 1;
}

/* Checkbox personalizado */
.form-options {
    display: flex;
    align-items: center;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    user-select: none;
}

.checkbox-container input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    background: var(--bg-secondary);
    border: 2px solid #444;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.checkbox-container input:checked + .checkmark {
    background: var(--accent-green);
    border-color: var(--accent-green);
}

.checkmark:after {
    content: "";
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translateY(-1px);
    opacity: 0;
    transition: var(--transition);
}

.checkbox-container input:checked + .checkmark:after {
    opacity: 1;
}

/* Botón de login */
.btn-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-dark) 100%);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

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

/* Footer */
.login-footer {
    margin-top: 25px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
}

.login-footer p {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Responsive */
@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }

    .login-header h1 {
        font-size: 24px;
    }

    .form-group input {
        padding: 12px 14px;
    }

    .btn-login {
        padding: 14px;
    }
}

/* Animación de carga */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}