* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    /* Fondo con textura metálica simulada mediante gradientes */
    background: radial-gradient(circle at center, #6b7280 0%, #374151 50%, #1f2937 100%);
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255,255,255,0.03) 1px, transparent 1px),
        radial-gradient(circle at center, #4b5563 0%, #1f2937 100%);
    background-size: 20px 20px, 20px 20px, 100% 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-wrapper {
    width: 100%;
    max-width: 440px;
    padding: 20px;
}

.login-card {
    /* Fondo de tarjeta estilo acero cepillado oscuro */
    background: linear-gradient(145deg, #4b5563, #374151);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
}

/* Logo Circular Metálico Superior */
.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.metal-logo {
    width: 90px;
    height: 90px;
    background: radial-gradient(circle at 30% 30%, #f3f4f6 0%, #9ca3af 40%, #4b5563 70%, #111827 100%);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 8px 16px rgba(0,0,0,0.4), inset 0 2px 3px rgba(255,255,255,0.6);
    border: 2px solid #374151;
    position: relative;
}

.metal-logo img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.metal-logo span {
    color: #ffffff;
    font-weight: bold;
    font-size: 1.1rem;
    letter-spacing: 1px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.8);
}

.metal-logo::after {
    content: '';
    position: absolute;
    top: 6px;
    right: 12px;
    width: 8px;
    height: 8px;
    background-color: #fbbf24;
    border-radius: 50%;
    box-shadow: 0 0 4px #fbbf24;
}

h2 {
    color: #ffffff;
    text-align: center;
    margin-bottom: 25px;
    font-size: 1.5rem;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.input-group {
    margin-bottom: 18px;
}

.input-group label {
    display: block;
    color: #d1d5db;
    font-size: 0.85rem;
    margin-bottom: 6px;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    background: rgba(31, 41, 59, 0.8);
    border: 1px solid #4b5563;
    border-radius: 8px;
    color: #ffffff;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

.input-group input:focus {
    outline: none;
    border-color: #2e8b57;
    box-shadow: 0 0 8px rgba(46, 139, 87, 0.4), inset 0 2px 4px rgba(0,0,0,0.3);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    font-size: 0.85rem;
}

.checkbox-container {
    display: flex;
    align-items: center;
    color: #d1d5db;
    cursor: pointer;
}

.checkbox-container input {
    margin-right: 8px;
    accent-color: #2e8b57;
    width: 15px;
    height: 15px;
}

.forgot-link {
    color: #60a5fa;
    text-decoration: none;
    transition: color 0.2s;
}

.forgot-link:hover {
    color: #93c5fd;
    text-decoration: underline;
}

/* Botón Login en SeaGreen */
.btn-login {
    width: 100%;
    padding: 12px;
    background: linear-gradient(to bottom, #3cb371, #2e8b57);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255,255,255,0.3);
    transition: filter 0.2s, transform 0.1s;
}

.btn-login:hover {
    filter: brightness(1.1);
}

.btn-login:active {
    transform: scale(0.98);
}

.divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.15);
    margin: 25px 0 20px 0;
}

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

.register-section p {
    color: #9ca3af;
    font-size: 0.85rem;
    margin-bottom: 12px;
}

/* Botón secundario Create Account */
.btn-create {
    width: 100%;
    padding: 12px;
    background: transparent;
    color: #3cb371;
    border: 1px solid #3cb371;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-create:hover {
    background: rgba(60, 179, 113, 0.15);
    color: #55db8d;
    border-color: #55db8d;
}